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  • 95
    New England Biolabs t4 rna ligase buffer
    DSSS protocol workflow. ( A ) Fragmentation. RNA is fragmented to sizes in the range of 60–200 nt. ( B ) Dephosphorylation. 5′ phosphates are removed from RNA by treatment with alkaline phosphatase. ( C ) 3′ adapter ligation. Dephosphorylated 200-nt-long RNA fragments are selected by urea-PAGE. The 3′ adapter is ligated to the 3′ ends using <t>T4</t> RNA ligase I. ( D ) Rephosphorylation. Fragments are rephosphorylated by treatment with T4 polynucleotide kinase as preparation for the next ligation step. ( E ) 5′ adapter ligation, preceded by removal of the nonligated 3′adapter by urea-PAGE size selection. ( F ) Reverse transcription (RT) and amplification of library. Molecules with 5′ and 3′ adapters were selected by urea-PAGE. First strand cDNA synthesis and PCR amplification were carried out with the indicated primers. ( G ) Sequencing.
    T4 Rna Ligase Buffer, supplied by New England Biolabs, used in various techniques. Bioz Stars score: 95/100, based on 336 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    90
    Thermo Fisher t4 rna ligase buffer
    Preparation and analysis on circular RNA in vitro . (A) Schematic of in vitro circularization constructs. Transcripts to be circularized consist of a terminal 10 nt open loop structure (black) and a reverse-complementary repeat sequence of 11 nt, which forms an intramolecular stem (red). This structure is followed by a 63 nt constant region for detection by northern blot or PCR (blue), followed by the miRNA-122 sponge (bulge; perfect) or a scrambled control sequence (shuffle) in grey. (B) Schematic of the in vitro ligation reaction. 4-fold excess of GMP over GTP results in ∼80% of the transcripts containing a 5′-monophosphate, enabling efficient in vitro ligation by <t>T4</t> RNA ligase. Ligation products are circular RNAs (intramolecular ligation) or linear dimers (intermolecular ligation). (C) In vitro ligation reactions described in (B) were analyzed on 5%, 6% or 7% polyacrylamide-urea gels by ethidium bromide staining. While mobility of linear RNAs remains unchanged compared to RNA marker, the apparent mobility of circular RNA is lower in higher percentage gels (indicated by dash/double dash or circle). (D) Purified linear or circular RNAs from (C) were transfected in HuH-7.5 cells and total RNA was prepared after 4, 8, 14, 24 and 32 h. RNAs were detected by ³²P-northern blot analysis using identical probes in the constant region [labeled blue in (A)]. (E) HuH-7.5 cells transfected with circular RNA or linear RNA from (C) were subjected to sub-cellular fractionation and cytoplasmic or nuclear fractions were analyzed by ³²P-northern blot detecting transfected RNAs along with U1 snRNA and by western blot against hnRNP A1 or GAPDH proteins as a fractionation control. In the circRNA-transfected samples, a degradation product is detected at linear monomer size (“linearized”).
    T4 Rna Ligase Buffer, supplied by Thermo Fisher, used in various techniques. Bioz Stars score: 90/100, based on 112 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    90
    TaKaRa t4 rna ligase buffer
    Gel electrophoresis pattern of mRNA-linker ligation. The ligation products reacted with or without prRT- DNA oligomer used as a blocker of the 3'-end of mRNA were electrophoresis on 8 M urea 8 % PAGE at 65 °C and were visualized with fluorescence of (A) SYBR Green II and (B) FITC. Lane M: DNA ladder, Lane Y: ligation product, Lane L-: negative control, reaction product without DNA-linker, Lane E-: negative control, reaction product without <t>T4</t> RNA ligase. Mobility of the mRNA-linker and the self-ligation product of mRNA are shown to be equivalent.
    T4 Rna Ligase Buffer, supplied by TaKaRa, used in various techniques. Bioz Stars score: 90/100, based on 11 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    91
    Promega t4 rna ligase buffer
    Gel electrophoresis pattern of mRNA-linker ligation. The ligation products reacted with or without prRT- DNA oligomer used as a blocker of the 3'-end of mRNA were electrophoresis on 8 M urea 8 % PAGE at 65 °C and were visualized with fluorescence of (A) SYBR Green II and (B) FITC. Lane M: DNA ladder, Lane Y: ligation product, Lane L-: negative control, reaction product without DNA-linker, Lane E-: negative control, reaction product without <t>T4</t> RNA ligase. Mobility of the mRNA-linker and the self-ligation product of mRNA are shown to be equivalent.
    T4 Rna Ligase Buffer, supplied by Promega, used in various techniques. Bioz Stars score: 91/100, based on 18 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    99
    Roche t4 rna ligase buffer
    Analysis of wild-type and mutant virion RNA content by RNA end-labeling. RNA extracted from virions was end-labeled with <t>T4</t> RNA ligase and [ 32 P]pCp, and was analyzed on a denaturing 1% agarose gel. ( A ) RNAs extracted from the same number of wild-type (lane 1) and Ψ − (lane 2) virion particles or from a mock preparation (lane 3). ( B ) RNAs extracted from the same number of PR − (lane 4) and Ψ − PR − (lane 5) virion particles or from a mock preparation (lane 6). Lanes 1, 2, and 3 of B represent 2, 1, and 0.5 pmol of yeast tRNA, respectively, which were labeled by the same technique as the other RNA samples.
    T4 Rna Ligase Buffer, supplied by Roche, used in various techniques. Bioz Stars score: 99/100, based on 21 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    78
    Enzymatics t4 rna ligase 2tr buffer
    Analysis of wild-type and mutant virion RNA content by RNA end-labeling. RNA extracted from virions was end-labeled with <t>T4</t> RNA ligase and [ 32 P]pCp, and was analyzed on a denaturing 1% agarose gel. ( A ) RNAs extracted from the same number of wild-type (lane 1) and Ψ − (lane 2) virion particles or from a mock preparation (lane 3). ( B ) RNAs extracted from the same number of PR − (lane 4) and Ψ − PR − (lane 5) virion particles or from a mock preparation (lane 6). Lanes 1, 2, and 3 of B represent 2, 1, and 0.5 pmol of yeast tRNA, respectively, which were labeled by the same technique as the other RNA samples.
    T4 Rna Ligase 2tr Buffer, supplied by Enzymatics, used in various techniques. Bioz Stars score: 78/100, based on 2 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    81
    Thermo Fisher 10x t4 rna ligase buffer
    Analysis of wild-type and mutant virion RNA content by RNA end-labeling. RNA extracted from virions was end-labeled with <t>T4</t> RNA ligase and [ 32 P]pCp, and was analyzed on a denaturing 1% agarose gel. ( A ) RNAs extracted from the same number of wild-type (lane 1) and Ψ − (lane 2) virion particles or from a mock preparation (lane 3). ( B ) RNAs extracted from the same number of PR − (lane 4) and Ψ − PR − (lane 5) virion particles or from a mock preparation (lane 6). Lanes 1, 2, and 3 of B represent 2, 1, and 0.5 pmol of yeast tRNA, respectively, which were labeled by the same technique as the other RNA samples.
    10x T4 Rna Ligase Buffer, supplied by Thermo Fisher, used in various techniques. Bioz Stars score: 81/100, based on 7 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    90
    Thermo Fisher t4 rna ligase
    Example for splint-assisted enzymatic ligation of fully modified tRNA 5′-fragments to synthetic 3′-peptidylamino-RNA conjugates. ( a ) Structures of the 5′-fragment from S. cerevisiae tRNA Phe 5 and the dipeptide-RNA conjugate 6 to form a preligation complex that allows <t>T4</t> RNA ligation of the full-length tRNA-peptide conjugate 8. ( b ) Without splint 7 only marginal amounts of product 8 were formed; reaction conditions: T4 RNA ligase (0.5 U/µl; c RNA = 40 µM each strand; donor/acceptor = 1/1), 50 mM HEPES–NaOH (pH 8.0), 10 mM MgCl 2 , 10 mM DTT, 1 mM ATP, 0.1 mg/ml BSA, 37°C. ( c ) Ligation promoted by splint 7 resulted in 75% yield of 8 . The reaction was monitored by anion-exchange HPLC (for conditions see ‘Materials and Methods’ section); an unidentified, unreactive impurity is marked by an asterisk; reaction conditions: T4 RNA ligase (0.25 U/µl; c RNA = 40 µM each strand; c DNA = 40 µM; donor/acceptor/splint = 1/1/1), buffer as in (b) and 0.5 mM ATP, 37°C. For structures and abbreviations of modified nucleosides see Supplementart Data .
    T4 Rna Ligase, supplied by Thermo Fisher, used in various techniques. Bioz Stars score: 90/100, based on 2401 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    90
    Thermo Fisher t4 dna ligation buffer
    15% denaturing PAGE for the ligation products of linkers A–B, C–D and linkers G–H. PAGE (10×10×0.03 cm, A:B = 29∶1, 7 M urea, 0.5x TBE) was run in 0.5 x TBE, 25°C, 100 V for 3.5 hrs in ( A )–( F ), or 4.3 hrs in ( G ). The ligation products were indicated by the arrows. Lane M: DNA marker I (GeneRuler™ 50 bp DNA ladder, Fermentas). Lane M1: DNA marker I plus oligo 15. ( A ) The ligation products joined by using <t>T4</t> DNA ligase from Fermentas. Lane 1: the ligation products of linkers C–D preincubated with T4 DNA ligase; Lane 2: the ligation products of linkers C–D without the preincubation; Lane 4: the ligation products of linkers A–B; Lanes 3 and 5: the negative controls. ( B ) The ligation products joined by using T4 DNA ligase from Takara. Lanes 1–3∶0.5, 1, and 2 µl of 1 µM oligo 15, respectively; Lanes 4 and 6: the ligation products of linkers A–B; Lane 8: the ligation products of linkers C–D. Lanes 5, 7, and 9: the negative controls. ( C ) The ligation products joined by using T4 DNA ligase from Promega. Lane 1∶1 µl of 1 µM oligo 15; Lanes 2 and 4: ligation products of linkers A–B, and C–D, respectively; Lanes 3 and 5: the negative controls. ( D ) The ligation products joined by using E. coli DNA ligase from Takara. Lanes 1 and 3: the ligation products of linkers A–B, and C–D, respectively; Lanes 2 and 4: the negative controls. ( E ) The ligation products of linkers A–B joined in T4 DNA ligase reaction mixture containing (NH 4 ) 2 SO 4 . Lanes 1–3: the ligase reaction mixture with 7.5 mM (NH 4 ) 2 SO 4 , 3.75 mM (NH 4 ) 2 SO 4 , and without (NH 4 ) 2 SO 4 , respectively; Lane 4: the negative control. ( F ) The ligation products of the phosphorylated linkers A–B and C–D joined by using T4 and E. coli DNA ligase (Takara). Lane 1∶1 µl of 1 µM oligo 15; Lanes 2 and 4: the ligation products of the phosphorylated linkers A–B joined by using T4 and E. coli DNA ligase, respectively; Lanes 3 and 5: the ligation products of the phosphorylated linkers C–D joined by using T4 and E. coli DNA ligase, respectively; Lanes 6 and 7: the ligation products of linkers A–B and C–D, respectively; Lanes 8 and 9: the negative controls of lanes 6 and 7, respectively. ( G ) The ligation products of linkers A–B and the phosphorylated linkers G–H. Lanes 1 and 2: the ligation products of linkers A–B and the ligation products of the phosphorylated linkers G–H plus the negative control of linkers A–B, respectively; Lane 3: the negative control of linkers G–H plus the negative control of linkers A–B. The band from the ligation products of the phosphorylated linkers G–H run a little more slowly than that of linkers A–B. The sequences of linkers G and H are similar to those of linkers A and B, respectively. But there is a 1-base deletion at the 5′ end of each of linkers G and H.
    T4 Dna Ligation Buffer, supplied by Thermo Fisher, used in various techniques. Bioz Stars score: 90/100, based on 20 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    95
    New England Biolabs t4 rnl2
    15% denaturing PAGE for the ligation products of linkers A–B, C–D and linkers G–H. PAGE (10×10×0.03 cm, A:B = 29∶1, 7 M urea, 0.5x TBE) was run in 0.5 x TBE, 25°C, 100 V for 3.5 hrs in ( A )–( F ), or 4.3 hrs in ( G ). The ligation products were indicated by the arrows. Lane M: DNA marker I (GeneRuler™ 50 bp DNA ladder, Fermentas). Lane M1: DNA marker I plus oligo 15. ( A ) The ligation products joined by using <t>T4</t> DNA ligase from Fermentas. Lane 1: the ligation products of linkers C–D preincubated with T4 DNA ligase; Lane 2: the ligation products of linkers C–D without the preincubation; Lane 4: the ligation products of linkers A–B; Lanes 3 and 5: the negative controls. ( B ) The ligation products joined by using T4 DNA ligase from Takara. Lanes 1–3∶0.5, 1, and 2 µl of 1 µM oligo 15, respectively; Lanes 4 and 6: the ligation products of linkers A–B; Lane 8: the ligation products of linkers C–D. Lanes 5, 7, and 9: the negative controls. ( C ) The ligation products joined by using T4 DNA ligase from Promega. Lane 1∶1 µl of 1 µM oligo 15; Lanes 2 and 4: ligation products of linkers A–B, and C–D, respectively; Lanes 3 and 5: the negative controls. ( D ) The ligation products joined by using E. coli DNA ligase from Takara. Lanes 1 and 3: the ligation products of linkers A–B, and C–D, respectively; Lanes 2 and 4: the negative controls. ( E ) The ligation products of linkers A–B joined in T4 DNA ligase reaction mixture containing (NH 4 ) 2 SO 4 . Lanes 1–3: the ligase reaction mixture with 7.5 mM (NH 4 ) 2 SO 4 , 3.75 mM (NH 4 ) 2 SO 4 , and without (NH 4 ) 2 SO 4 , respectively; Lane 4: the negative control. ( F ) The ligation products of the phosphorylated linkers A–B and C–D joined by using T4 and E. coli DNA ligase (Takara). Lane 1∶1 µl of 1 µM oligo 15; Lanes 2 and 4: the ligation products of the phosphorylated linkers A–B joined by using T4 and E. coli DNA ligase, respectively; Lanes 3 and 5: the ligation products of the phosphorylated linkers C–D joined by using T4 and E. coli DNA ligase, respectively; Lanes 6 and 7: the ligation products of linkers A–B and C–D, respectively; Lanes 8 and 9: the negative controls of lanes 6 and 7, respectively. ( G ) The ligation products of linkers A–B and the phosphorylated linkers G–H. Lanes 1 and 2: the ligation products of linkers A–B and the ligation products of the phosphorylated linkers G–H plus the negative control of linkers A–B, respectively; Lane 3: the negative control of linkers G–H plus the negative control of linkers A–B. The band from the ligation products of the phosphorylated linkers G–H run a little more slowly than that of linkers A–B. The sequences of linkers G and H are similar to those of linkers A and B, respectively. But there is a 1-base deletion at the 5′ end of each of linkers G and H.
    T4 Rnl2, supplied by New England Biolabs, used in various techniques. Bioz Stars score: 95/100, based on 65 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    New England Biolabs t4 rna ligase 2 truncated buffer
    Graphical Visualization of the 3′ RACE-Seq Approach, Related to Figure 2 (A) Graphical representation of 3′ RACE-seq library preparation and the oligonucleotides used. First, the 3′ adaptor RA3_15N was joined to the 3′ end of RNA by enzymatic ligation. The adaptor has: (i) 5′ rApp modification for efficient and specific ligation by the truncated <t>T4</t> RNA ligase 2, (ii) delimiter sequence to be used in bioinformatics analyses to exclude RT and PCR artifacts (CTGAC, highlighted in violet), (iii) unique 15N barcode for individual transcript barcoding (highlighted in green), (iv) anchor sequence to pair with the reverse transcription primer (underlined) and (v) dideoxyC on the 3′ end to prevent concatamer formation. The RNA ligated to the adaptor sequence was purified from excess adaptor and reverse transcription was performed with the RT primer, which is compatible with Illumina sequencing and has: (i) sequences to base-pair with the adaptor (underlined), (ii) 6-nucleotide barcode for sample barcoding (highlighted in red), (iii) sequences that base pair with the universal outer primer for nested PCR (blue). Libraries were generated by nested PCR with 2 outer forward primers (F1 and F2) and a single universal reverse primer (uni rev). PCR amplicons of first and second PCRs were purified from excess primers on AmPure beads (Agencourt) before beginning the next step. (B) Flowchart of the bioinformatics approach to 3′ RACE-seq data analysis. The procedure starts at the top. Datasets are shown in rectangles. Software used is depicted in hexagons.
    T4 Rna Ligase 2 Truncated Buffer, supplied by New England Biolabs, used in various techniques. Bioz Stars score: 95/100, based on 20 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    New England Biolabs t4 rna ligase 2 k227q rnl2 buffer
    Graphical Visualization of the 3′ RACE-Seq Approach, Related to Figure 2 (A) Graphical representation of 3′ RACE-seq library preparation and the oligonucleotides used. First, the 3′ adaptor RA3_15N was joined to the 3′ end of RNA by enzymatic ligation. The adaptor has: (i) 5′ rApp modification for efficient and specific ligation by the truncated <t>T4</t> RNA ligase 2, (ii) delimiter sequence to be used in bioinformatics analyses to exclude RT and PCR artifacts (CTGAC, highlighted in violet), (iii) unique 15N barcode for individual transcript barcoding (highlighted in green), (iv) anchor sequence to pair with the reverse transcription primer (underlined) and (v) dideoxyC on the 3′ end to prevent concatamer formation. The RNA ligated to the adaptor sequence was purified from excess adaptor and reverse transcription was performed with the RT primer, which is compatible with Illumina sequencing and has: (i) sequences to base-pair with the adaptor (underlined), (ii) 6-nucleotide barcode for sample barcoding (highlighted in red), (iii) sequences that base pair with the universal outer primer for nested PCR (blue). Libraries were generated by nested PCR with 2 outer forward primers (F1 and F2) and a single universal reverse primer (uni rev). PCR amplicons of first and second PCRs were purified from excess primers on AmPure beads (Agencourt) before beginning the next step. (B) Flowchart of the bioinformatics approach to 3′ RACE-seq data analysis. The procedure starts at the top. Datasets are shown in rectangles. Software used is depicted in hexagons.
    T4 Rna Ligase 2 K227q Rnl2 Buffer, supplied by New England Biolabs, used in various techniques. Bioz Stars score: 95/100, based on 10 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    90
    Thermo Fisher t4 dna ligase
    Graphical Visualization of the 3′ RACE-Seq Approach, Related to Figure 2 (A) Graphical representation of 3′ RACE-seq library preparation and the oligonucleotides used. First, the 3′ adaptor RA3_15N was joined to the 3′ end of RNA by enzymatic ligation. The adaptor has: (i) 5′ rApp modification for efficient and specific ligation by the truncated <t>T4</t> RNA ligase 2, (ii) delimiter sequence to be used in bioinformatics analyses to exclude RT and PCR artifacts (CTGAC, highlighted in violet), (iii) unique 15N barcode for individual transcript barcoding (highlighted in green), (iv) anchor sequence to pair with the reverse transcription primer (underlined) and (v) dideoxyC on the 3′ end to prevent concatamer formation. The RNA ligated to the adaptor sequence was purified from excess adaptor and reverse transcription was performed with the RT primer, which is compatible with Illumina sequencing and has: (i) sequences to base-pair with the adaptor (underlined), (ii) 6-nucleotide barcode for sample barcoding (highlighted in red), (iii) sequences that base pair with the universal outer primer for nested PCR (blue). Libraries were generated by nested PCR with 2 outer forward primers (F1 and F2) and a single universal reverse primer (uni rev). PCR amplicons of first and second PCRs were purified from excess primers on AmPure beads (Agencourt) before beginning the next step. (B) Flowchart of the bioinformatics approach to 3′ RACE-seq data analysis. The procedure starts at the top. Datasets are shown in rectangles. Software used is depicted in hexagons.
    T4 Dna Ligase, supplied by Thermo Fisher, used in various techniques. Bioz Stars score: 90/100, based on 19341 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    Thermo Fisher dynabeads m 280 streptavidin
    Graphical Visualization of the 3′ RACE-Seq Approach, Related to Figure 2 (A) Graphical representation of 3′ RACE-seq library preparation and the oligonucleotides used. First, the 3′ adaptor RA3_15N was joined to the 3′ end of RNA by enzymatic ligation. The adaptor has: (i) 5′ rApp modification for efficient and specific ligation by the truncated <t>T4</t> RNA ligase 2, (ii) delimiter sequence to be used in bioinformatics analyses to exclude RT and PCR artifacts (CTGAC, highlighted in violet), (iii) unique 15N barcode for individual transcript barcoding (highlighted in green), (iv) anchor sequence to pair with the reverse transcription primer (underlined) and (v) dideoxyC on the 3′ end to prevent concatamer formation. The RNA ligated to the adaptor sequence was purified from excess adaptor and reverse transcription was performed with the RT primer, which is compatible with Illumina sequencing and has: (i) sequences to base-pair with the adaptor (underlined), (ii) 6-nucleotide barcode for sample barcoding (highlighted in red), (iii) sequences that base pair with the universal outer primer for nested PCR (blue). Libraries were generated by nested PCR with 2 outer forward primers (F1 and F2) and a single universal reverse primer (uni rev). PCR amplicons of first and second PCRs were purified from excess primers on AmPure beads (Agencourt) before beginning the next step. (B) Flowchart of the bioinformatics approach to 3′ RACE-seq data analysis. The procedure starts at the top. Datasets are shown in rectangles. Software used is depicted in hexagons.
    Dynabeads M 280 Streptavidin, supplied by Thermo Fisher, used in various techniques. Bioz Stars score: 90/100, based on 3244 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    Image Search Results


    DSSS protocol workflow. ( A ) Fragmentation. RNA is fragmented to sizes in the range of 60–200 nt. ( B ) Dephosphorylation. 5′ phosphates are removed from RNA by treatment with alkaline phosphatase. ( C ) 3′ adapter ligation. Dephosphorylated 200-nt-long RNA fragments are selected by urea-PAGE. The 3′ adapter is ligated to the 3′ ends using T4 RNA ligase I. ( D ) Rephosphorylation. Fragments are rephosphorylated by treatment with T4 polynucleotide kinase as preparation for the next ligation step. ( E ) 5′ adapter ligation, preceded by removal of the nonligated 3′adapter by urea-PAGE size selection. ( F ) Reverse transcription (RT) and amplification of library. Molecules with 5′ and 3′ adapters were selected by urea-PAGE. First strand cDNA synthesis and PCR amplification were carried out with the indicated primers. ( G ) Sequencing.

    Journal: Genome Research

    Article Title: Strand-specific deep sequencing of the transcriptome

    doi: 10.1101/gr.094318.109

    Figure Lengend Snippet: DSSS protocol workflow. ( A ) Fragmentation. RNA is fragmented to sizes in the range of 60–200 nt. ( B ) Dephosphorylation. 5′ phosphates are removed from RNA by treatment with alkaline phosphatase. ( C ) 3′ adapter ligation. Dephosphorylated 200-nt-long RNA fragments are selected by urea-PAGE. The 3′ adapter is ligated to the 3′ ends using T4 RNA ligase I. ( D ) Rephosphorylation. Fragments are rephosphorylated by treatment with T4 polynucleotide kinase as preparation for the next ligation step. ( E ) 5′ adapter ligation, preceded by removal of the nonligated 3′adapter by urea-PAGE size selection. ( F ) Reverse transcription (RT) and amplification of library. Molecules with 5′ and 3′ adapters were selected by urea-PAGE. First strand cDNA synthesis and PCR amplification were carried out with the indicated primers. ( G ) Sequencing.

    Article Snippet: We incubated the following reaction mixture for 30 min at 37°C: 10 μL of sample, 1 μL of 10× T4 RNA ligase buffer (as fresh ATP supply), 10 U of polynucleotide kinase (New England BioLabs), 3 μL of RNase free water.

    Techniques: De-Phosphorylation Assay, Ligation, Polyacrylamide Gel Electrophoresis, Selection, Amplification, Polymerase Chain Reaction, Sequencing

    Preparation and analysis on circular RNA in vitro . (A) Schematic of in vitro circularization constructs. Transcripts to be circularized consist of a terminal 10 nt open loop structure (black) and a reverse-complementary repeat sequence of 11 nt, which forms an intramolecular stem (red). This structure is followed by a 63 nt constant region for detection by northern blot or PCR (blue), followed by the miRNA-122 sponge (bulge; perfect) or a scrambled control sequence (shuffle) in grey. (B) Schematic of the in vitro ligation reaction. 4-fold excess of GMP over GTP results in ∼80% of the transcripts containing a 5′-monophosphate, enabling efficient in vitro ligation by T4 RNA ligase. Ligation products are circular RNAs (intramolecular ligation) or linear dimers (intermolecular ligation). (C) In vitro ligation reactions described in (B) were analyzed on 5%, 6% or 7% polyacrylamide-urea gels by ethidium bromide staining. While mobility of linear RNAs remains unchanged compared to RNA marker, the apparent mobility of circular RNA is lower in higher percentage gels (indicated by dash/double dash or circle). (D) Purified linear or circular RNAs from (C) were transfected in HuH-7.5 cells and total RNA was prepared after 4, 8, 14, 24 and 32 h. RNAs were detected by ³²P-northern blot analysis using identical probes in the constant region [labeled blue in (A)]. (E) HuH-7.5 cells transfected with circular RNA or linear RNA from (C) were subjected to sub-cellular fractionation and cytoplasmic or nuclear fractions were analyzed by ³²P-northern blot detecting transfected RNAs along with U1 snRNA and by western blot against hnRNP A1 or GAPDH proteins as a fractionation control. In the circRNA-transfected samples, a degradation product is detected at linear monomer size (“linearized”).

    Journal: RNA Biology

    Article Title: Functional sequestration of microRNA-122 from Hepatitis C Virus by circular RNA sponges

    doi: 10.1080/15476286.2018.1435248

    Figure Lengend Snippet: Preparation and analysis on circular RNA in vitro . (A) Schematic of in vitro circularization constructs. Transcripts to be circularized consist of a terminal 10 nt open loop structure (black) and a reverse-complementary repeat sequence of 11 nt, which forms an intramolecular stem (red). This structure is followed by a 63 nt constant region for detection by northern blot or PCR (blue), followed by the miRNA-122 sponge (bulge; perfect) or a scrambled control sequence (shuffle) in grey. (B) Schematic of the in vitro ligation reaction. 4-fold excess of GMP over GTP results in ∼80% of the transcripts containing a 5′-monophosphate, enabling efficient in vitro ligation by T4 RNA ligase. Ligation products are circular RNAs (intramolecular ligation) or linear dimers (intermolecular ligation). (C) In vitro ligation reactions described in (B) were analyzed on 5%, 6% or 7% polyacrylamide-urea gels by ethidium bromide staining. While mobility of linear RNAs remains unchanged compared to RNA marker, the apparent mobility of circular RNA is lower in higher percentage gels (indicated by dash/double dash or circle). (D) Purified linear or circular RNAs from (C) were transfected in HuH-7.5 cells and total RNA was prepared after 4, 8, 14, 24 and 32 h. RNAs were detected by ³²P-northern blot analysis using identical probes in the constant region [labeled blue in (A)]. (E) HuH-7.5 cells transfected with circular RNA or linear RNA from (C) were subjected to sub-cellular fractionation and cytoplasmic or nuclear fractions were analyzed by ³²P-northern blot detecting transfected RNAs along with U1 snRNA and by western blot against hnRNP A1 or GAPDH proteins as a fractionation control. In the circRNA-transfected samples, a degradation product is detected at linear monomer size (“linearized”).

    Article Snippet: Next, T4 RNA ligase buffer and RNaseOUT (Thermo Fisher Scientific) were added and incubated for 10 min at 37°C.

    Techniques: In Vitro, Construct, Sequencing, Northern Blot, Polymerase Chain Reaction, Ligation, Staining, Marker, Purification, Transfection, Labeling, Cell Fractionation, Western Blot, Fractionation

    Gel electrophoresis pattern of mRNA-linker ligation. The ligation products reacted with or without prRT- DNA oligomer used as a blocker of the 3'-end of mRNA were electrophoresis on 8 M urea 8 % PAGE at 65 °C and were visualized with fluorescence of (A) SYBR Green II and (B) FITC. Lane M: DNA ladder, Lane Y: ligation product, Lane L-: negative control, reaction product without DNA-linker, Lane E-: negative control, reaction product without T4 RNA ligase. Mobility of the mRNA-linker and the self-ligation product of mRNA are shown to be equivalent.

    Journal: International Journal of Biological Sciences

    Article Title: An mRNA-protein Fusion at N-terminus for Evolutionary Protein Engineering

    doi:

    Figure Lengend Snippet: Gel electrophoresis pattern of mRNA-linker ligation. The ligation products reacted with or without prRT- DNA oligomer used as a blocker of the 3'-end of mRNA were electrophoresis on 8 M urea 8 % PAGE at 65 °C and were visualized with fluorescence of (A) SYBR Green II and (B) FITC. Lane M: DNA ladder, Lane Y: ligation product, Lane L-: negative control, reaction product without DNA-linker, Lane E-: negative control, reaction product without T4 RNA ligase. Mobility of the mRNA-linker and the self-ligation product of mRNA are shown to be equivalent.

    Article Snippet: Ligation between the mRNA and the hydrazide-linker The mRNA (2 µM) was hybridized to the DNA moiety of the hydrazide-linker (4 µM) and prRT- (4 µM) by heating at 95 °C and cooling to 25 °C in 50 µl of T4 RNA ligase buffer (Takara Bio) and ligation reaction was started by adding T4 RNA ligase (40 U, Takara Bio) and ribonuclease inhibitor (40 U, Takara Bio).

    Techniques: Nucleic Acid Electrophoresis, Ligation, Electrophoresis, Polyacrylamide Gel Electrophoresis, Fluorescence, SYBR Green Assay, Negative Control

    Screening cycle of the mRNA-protein fusion in this study. The dsDNA library is transcribed to mRNA. The mRNA is hybridized to the DNA moiety of the linker having hydrazide group and ligated with T4 RNA ligase. Hydrazide group of the ligated product and acetyl group of the phenylalanine derivative that is acylated to sup tRNA are ligated chemically and the modified mRNA is translated. The modified aminoacyl sup tRNA tends to occupy the A-site of ribosome at UAG codon inserted near downstream of initiation codon and the phenylalanine is incorporated into the growing peptide. Thus, linkage between N-terminus of the nascent peptide and 5'-terminus of its mRNA is achieved. Screening of mRNA-peptide fusion library according to property of the displayed peptide and amplify the genotype molecules of the screened fusions by RT-PCR.

    Journal: International Journal of Biological Sciences

    Article Title: An mRNA-protein Fusion at N-terminus for Evolutionary Protein Engineering

    doi:

    Figure Lengend Snippet: Screening cycle of the mRNA-protein fusion in this study. The dsDNA library is transcribed to mRNA. The mRNA is hybridized to the DNA moiety of the linker having hydrazide group and ligated with T4 RNA ligase. Hydrazide group of the ligated product and acetyl group of the phenylalanine derivative that is acylated to sup tRNA are ligated chemically and the modified mRNA is translated. The modified aminoacyl sup tRNA tends to occupy the A-site of ribosome at UAG codon inserted near downstream of initiation codon and the phenylalanine is incorporated into the growing peptide. Thus, linkage between N-terminus of the nascent peptide and 5'-terminus of its mRNA is achieved. Screening of mRNA-peptide fusion library according to property of the displayed peptide and amplify the genotype molecules of the screened fusions by RT-PCR.

    Article Snippet: Ligation between the mRNA and the hydrazide-linker The mRNA (2 µM) was hybridized to the DNA moiety of the hydrazide-linker (4 µM) and prRT- (4 µM) by heating at 95 °C and cooling to 25 °C in 50 µl of T4 RNA ligase buffer (Takara Bio) and ligation reaction was started by adding T4 RNA ligase (40 U, Takara Bio) and ribonuclease inhibitor (40 U, Takara Bio).

    Techniques: Modification, Reverse Transcription Polymerase Chain Reaction

    Analysis of wild-type and mutant virion RNA content by RNA end-labeling. RNA extracted from virions was end-labeled with T4 RNA ligase and [ 32 P]pCp, and was analyzed on a denaturing 1% agarose gel. ( A ) RNAs extracted from the same number of wild-type (lane 1) and Ψ − (lane 2) virion particles or from a mock preparation (lane 3). ( B ) RNAs extracted from the same number of PR − (lane 4) and Ψ − PR − (lane 5) virion particles or from a mock preparation (lane 6). Lanes 1, 2, and 3 of B represent 2, 1, and 0.5 pmol of yeast tRNA, respectively, which were labeled by the same technique as the other RNA samples.

    Journal: Proceedings of the National Academy of Sciences of the United States of America

    Article Title: RNA is a structural element in retrovirus particles

    doi: 10.1073/pnas.091000398

    Figure Lengend Snippet: Analysis of wild-type and mutant virion RNA content by RNA end-labeling. RNA extracted from virions was end-labeled with T4 RNA ligase and [ 32 P]pCp, and was analyzed on a denaturing 1% agarose gel. ( A ) RNAs extracted from the same number of wild-type (lane 1) and Ψ − (lane 2) virion particles or from a mock preparation (lane 3). ( B ) RNAs extracted from the same number of PR − (lane 4) and Ψ − PR − (lane 5) virion particles or from a mock preparation (lane 6). Lanes 1, 2, and 3 of B represent 2, 1, and 0.5 pmol of yeast tRNA, respectively, which were labeled by the same technique as the other RNA samples.

    Article Snippet: RNA extracted from viral particles or BHK cells was dissolved in 10 μl of RNase-free water and mixed with 17 μl of a buffer containing 10% DMSO (Sigma), 1× T4 RNA ligase buffer (Roche), 4 units of recombinant RNasin (Promega), and 10 μg/ml BSA.

    Techniques: Mutagenesis, End Labeling, Labeling, Agarose Gel Electrophoresis

    Example for splint-assisted enzymatic ligation of fully modified tRNA 5′-fragments to synthetic 3′-peptidylamino-RNA conjugates. ( a ) Structures of the 5′-fragment from S. cerevisiae tRNA Phe 5 and the dipeptide-RNA conjugate 6 to form a preligation complex that allows T4 RNA ligation of the full-length tRNA-peptide conjugate 8. ( b ) Without splint 7 only marginal amounts of product 8 were formed; reaction conditions: T4 RNA ligase (0.5 U/µl; c RNA = 40 µM each strand; donor/acceptor = 1/1), 50 mM HEPES–NaOH (pH 8.0), 10 mM MgCl 2 , 10 mM DTT, 1 mM ATP, 0.1 mg/ml BSA, 37°C. ( c ) Ligation promoted by splint 7 resulted in 75% yield of 8 . The reaction was monitored by anion-exchange HPLC (for conditions see ‘Materials and Methods’ section); an unidentified, unreactive impurity is marked by an asterisk; reaction conditions: T4 RNA ligase (0.25 U/µl; c RNA = 40 µM each strand; c DNA = 40 µM; donor/acceptor/splint = 1/1/1), buffer as in (b) and 0.5 mM ATP, 37°C. For structures and abbreviations of modified nucleosides see Supplementart Data .

    Journal: Nucleic Acids Research

    Article Title: Reliable semi-synthesis of hydrolysis-resistant 3?-peptidyl-tRNA conjugates containing genuine tRNA modifications

    doi: 10.1093/nar/gkq508

    Figure Lengend Snippet: Example for splint-assisted enzymatic ligation of fully modified tRNA 5′-fragments to synthetic 3′-peptidylamino-RNA conjugates. ( a ) Structures of the 5′-fragment from S. cerevisiae tRNA Phe 5 and the dipeptide-RNA conjugate 6 to form a preligation complex that allows T4 RNA ligation of the full-length tRNA-peptide conjugate 8. ( b ) Without splint 7 only marginal amounts of product 8 were formed; reaction conditions: T4 RNA ligase (0.5 U/µl; c RNA = 40 µM each strand; donor/acceptor = 1/1), 50 mM HEPES–NaOH (pH 8.0), 10 mM MgCl 2 , 10 mM DTT, 1 mM ATP, 0.1 mg/ml BSA, 37°C. ( c ) Ligation promoted by splint 7 resulted in 75% yield of 8 . The reaction was monitored by anion-exchange HPLC (for conditions see ‘Materials and Methods’ section); an unidentified, unreactive impurity is marked by an asterisk; reaction conditions: T4 RNA ligase (0.25 U/µl; c RNA = 40 µM each strand; c DNA = 40 µM; donor/acceptor/splint = 1/1/1), buffer as in (b) and 0.5 mM ATP, 37°C. For structures and abbreviations of modified nucleosides see Supplementart Data .

    Article Snippet: The sample was vortexed and centrifuged before it was treated with T4 RNA ligase (Fermentas; 10 U/µl in storage solution) to give a concentration of 0.25 U/µl (in the final reaction volume).

    Techniques: Ligation, Modification, High Performance Liquid Chromatography

    Example for enzymatic ligation of fully modified tRNA 5′-fragments to synthetic 3′-peptidylamino-RNA conjugates. ( a ) Structures of the 5′-fragment from E. coli tRNA Phe 5 and the dipeptide-RNA conjugate 6 to form a preligation complex that allows T4 RNA ligation of the full-length tRNA-peptide conjugate 8. ( b ) The ligation reaction was monitored by anion-exchange HPLC analysis: 83% yield was achieved after 3 h; reaction conditions: T4 RNA ligase (0.5 U/µl; c RNA = 40 µM each strand; donor/acceptor = 1/1), 50 mM HEPES–NaOH (pH 8.0), 10 mM MgCl 2 , 10 mM DTT, 1 mM ATP, 0.1 mg/ml BSA, 37°C. (c) Purified 3′-peptidyl-tRNA; ( d ) LC-ESI MS analysis of 8 : m.w. (calcd) = 25030, m.w. (found) = 25029 ± 10. Anion-exchange HPLC: for conditions see ‘Materials and Methods’ section. For structures and abbreviations of modified nucleosides see Supplementary Data .

    Journal: Nucleic Acids Research

    Article Title: Reliable semi-synthesis of hydrolysis-resistant 3?-peptidyl-tRNA conjugates containing genuine tRNA modifications

    doi: 10.1093/nar/gkq508

    Figure Lengend Snippet: Example for enzymatic ligation of fully modified tRNA 5′-fragments to synthetic 3′-peptidylamino-RNA conjugates. ( a ) Structures of the 5′-fragment from E. coli tRNA Phe 5 and the dipeptide-RNA conjugate 6 to form a preligation complex that allows T4 RNA ligation of the full-length tRNA-peptide conjugate 8. ( b ) The ligation reaction was monitored by anion-exchange HPLC analysis: 83% yield was achieved after 3 h; reaction conditions: T4 RNA ligase (0.5 U/µl; c RNA = 40 µM each strand; donor/acceptor = 1/1), 50 mM HEPES–NaOH (pH 8.0), 10 mM MgCl 2 , 10 mM DTT, 1 mM ATP, 0.1 mg/ml BSA, 37°C. (c) Purified 3′-peptidyl-tRNA; ( d ) LC-ESI MS analysis of 8 : m.w. (calcd) = 25030, m.w. (found) = 25029 ± 10. Anion-exchange HPLC: for conditions see ‘Materials and Methods’ section. For structures and abbreviations of modified nucleosides see Supplementary Data .

    Article Snippet: The sample was vortexed and centrifuged before it was treated with T4 RNA ligase (Fermentas; 10 U/µl in storage solution) to give a concentration of 0.25 U/µl (in the final reaction volume).

    Techniques: Ligation, Modification, High Performance Liquid Chromatography, Purification, Mass Spectrometry

    15% denaturing PAGE for the ligation products of linkers A–B, C–D and linkers G–H. PAGE (10×10×0.03 cm, A:B = 29∶1, 7 M urea, 0.5x TBE) was run in 0.5 x TBE, 25°C, 100 V for 3.5 hrs in ( A )–( F ), or 4.3 hrs in ( G ). The ligation products were indicated by the arrows. Lane M: DNA marker I (GeneRuler™ 50 bp DNA ladder, Fermentas). Lane M1: DNA marker I plus oligo 15. ( A ) The ligation products joined by using T4 DNA ligase from Fermentas. Lane 1: the ligation products of linkers C–D preincubated with T4 DNA ligase; Lane 2: the ligation products of linkers C–D without the preincubation; Lane 4: the ligation products of linkers A–B; Lanes 3 and 5: the negative controls. ( B ) The ligation products joined by using T4 DNA ligase from Takara. Lanes 1–3∶0.5, 1, and 2 µl of 1 µM oligo 15, respectively; Lanes 4 and 6: the ligation products of linkers A–B; Lane 8: the ligation products of linkers C–D. Lanes 5, 7, and 9: the negative controls. ( C ) The ligation products joined by using T4 DNA ligase from Promega. Lane 1∶1 µl of 1 µM oligo 15; Lanes 2 and 4: ligation products of linkers A–B, and C–D, respectively; Lanes 3 and 5: the negative controls. ( D ) The ligation products joined by using E. coli DNA ligase from Takara. Lanes 1 and 3: the ligation products of linkers A–B, and C–D, respectively; Lanes 2 and 4: the negative controls. ( E ) The ligation products of linkers A–B joined in T4 DNA ligase reaction mixture containing (NH 4 ) 2 SO 4 . Lanes 1–3: the ligase reaction mixture with 7.5 mM (NH 4 ) 2 SO 4 , 3.75 mM (NH 4 ) 2 SO 4 , and without (NH 4 ) 2 SO 4 , respectively; Lane 4: the negative control. ( F ) The ligation products of the phosphorylated linkers A–B and C–D joined by using T4 and E. coli DNA ligase (Takara). Lane 1∶1 µl of 1 µM oligo 15; Lanes 2 and 4: the ligation products of the phosphorylated linkers A–B joined by using T4 and E. coli DNA ligase, respectively; Lanes 3 and 5: the ligation products of the phosphorylated linkers C–D joined by using T4 and E. coli DNA ligase, respectively; Lanes 6 and 7: the ligation products of linkers A–B and C–D, respectively; Lanes 8 and 9: the negative controls of lanes 6 and 7, respectively. ( G ) The ligation products of linkers A–B and the phosphorylated linkers G–H. Lanes 1 and 2: the ligation products of linkers A–B and the ligation products of the phosphorylated linkers G–H plus the negative control of linkers A–B, respectively; Lane 3: the negative control of linkers G–H plus the negative control of linkers A–B. The band from the ligation products of the phosphorylated linkers G–H run a little more slowly than that of linkers A–B. The sequences of linkers G and H are similar to those of linkers A and B, respectively. But there is a 1-base deletion at the 5′ end of each of linkers G and H.

    Journal: PLoS ONE

    Article Title: Detection of Ligation Products of DNA Linkers with 5?-OH Ends by Denaturing PAGE Silver Stain

    doi: 10.1371/journal.pone.0039251

    Figure Lengend Snippet: 15% denaturing PAGE for the ligation products of linkers A–B, C–D and linkers G–H. PAGE (10×10×0.03 cm, A:B = 29∶1, 7 M urea, 0.5x TBE) was run in 0.5 x TBE, 25°C, 100 V for 3.5 hrs in ( A )–( F ), or 4.3 hrs in ( G ). The ligation products were indicated by the arrows. Lane M: DNA marker I (GeneRuler™ 50 bp DNA ladder, Fermentas). Lane M1: DNA marker I plus oligo 15. ( A ) The ligation products joined by using T4 DNA ligase from Fermentas. Lane 1: the ligation products of linkers C–D preincubated with T4 DNA ligase; Lane 2: the ligation products of linkers C–D without the preincubation; Lane 4: the ligation products of linkers A–B; Lanes 3 and 5: the negative controls. ( B ) The ligation products joined by using T4 DNA ligase from Takara. Lanes 1–3∶0.5, 1, and 2 µl of 1 µM oligo 15, respectively; Lanes 4 and 6: the ligation products of linkers A–B; Lane 8: the ligation products of linkers C–D. Lanes 5, 7, and 9: the negative controls. ( C ) The ligation products joined by using T4 DNA ligase from Promega. Lane 1∶1 µl of 1 µM oligo 15; Lanes 2 and 4: ligation products of linkers A–B, and C–D, respectively; Lanes 3 and 5: the negative controls. ( D ) The ligation products joined by using E. coli DNA ligase from Takara. Lanes 1 and 3: the ligation products of linkers A–B, and C–D, respectively; Lanes 2 and 4: the negative controls. ( E ) The ligation products of linkers A–B joined in T4 DNA ligase reaction mixture containing (NH 4 ) 2 SO 4 . Lanes 1–3: the ligase reaction mixture with 7.5 mM (NH 4 ) 2 SO 4 , 3.75 mM (NH 4 ) 2 SO 4 , and without (NH 4 ) 2 SO 4 , respectively; Lane 4: the negative control. ( F ) The ligation products of the phosphorylated linkers A–B and C–D joined by using T4 and E. coli DNA ligase (Takara). Lane 1∶1 µl of 1 µM oligo 15; Lanes 2 and 4: the ligation products of the phosphorylated linkers A–B joined by using T4 and E. coli DNA ligase, respectively; Lanes 3 and 5: the ligation products of the phosphorylated linkers C–D joined by using T4 and E. coli DNA ligase, respectively; Lanes 6 and 7: the ligation products of linkers A–B and C–D, respectively; Lanes 8 and 9: the negative controls of lanes 6 and 7, respectively. ( G ) The ligation products of linkers A–B and the phosphorylated linkers G–H. Lanes 1 and 2: the ligation products of linkers A–B and the ligation products of the phosphorylated linkers G–H plus the negative control of linkers A–B, respectively; Lane 3: the negative control of linkers G–H plus the negative control of linkers A–B. The band from the ligation products of the phosphorylated linkers G–H run a little more slowly than that of linkers A–B. The sequences of linkers G and H are similar to those of linkers A and B, respectively. But there is a 1-base deletion at the 5′ end of each of linkers G and H.

    Article Snippet: Ligations of the linkers with 5′-OH ends The ligations of linkers A–B, C–D, and E–F by using T4 DNA ligase were performed in 100 µl of T4 DNA ligase reaction mixture containing 1 x T4 DNA ligation buffer (40 mM Tris-HCl, 10 mM MgCl2 , 10 mM DTT, and 0.5 mM ATP; pH 7.8 at 25°C), 1 µM of each oligo, and 0.25 Weiss units/µl of T4 DNA ligase (Fermentas, Lithuania; Promega, USA; and Takara, Japan).

    Techniques: Polyacrylamide Gel Electrophoresis, Ligation, Marker, Negative Control

    12% denaturing PAGE for the ligation products of linkers A–B treated with CIAP. PAGE (10×10×0.03 cm, A:B = 19∶1, 7 M urea and 0.5 x TBE) was run in 0.5 x TBE, 25°C, 200 V for 1.7 hrs. The arrows indicate the ligation products. Lane M: DNA marker I (GeneRuler™ 50 bp DNA ladder, Fermentas); Lane M1: DNA marker I +1 µl of 1 µM oligo 15. The ligases used in ( A )–( C ) were T4 DNA ligases. The ligases used in ( D )–( E ) were E. coli DNA ligases. ( A ) CIAP was inactivated at 75°C for 15 min. Lanes 1 and 5∶1 µl of 1 µM oligo 15; Lanes 2: CIAP was inactivated at 75°C for 15 min; Lane 3: the positive control without CIAP treatment; Lane 4: the negative control without ligase. ( B ) CIAP was inactivated at 85°C for 25 min and 45 min. Lanes 1 and 3: the positive controls without CIAP treatment; Lanes 2 and 4: CIAP was inactivated at 85°C for 25 min and 45 min, respectively; Lane 5: the negative control without ligase. ( C ) CIAP was inactivated at 85°C for 65 min and 90 min. Lanes 1 and 3: the positive controls without CIAP treatment; Lanes 2 and 4: CIAP was inactivated at 85°C for 65 min and 90 min, respectively; Lane 5: the negative control without ligase. ( D ) CIAP was inactivated at 85°C for 45 min. Lanes 1 and 3: the positive control without CIAP treatment and the negative control without ligase, respectively; Lane 2: CIAP was inactivated at 85°C for 45 min. ( E ) CIAP was inactivated at 85°C for 65 and 90 min. Lanes 1 and 3: the positive controls without CIAP treatment; Lanes 2 and 4: CIAP was inactivated at 85°C for 65 and 90 min, respectively; Lane 5: the negative control without ligase.

    Journal: PLoS ONE

    Article Title: Detection of Ligation Products of DNA Linkers with 5?-OH Ends by Denaturing PAGE Silver Stain

    doi: 10.1371/journal.pone.0039251

    Figure Lengend Snippet: 12% denaturing PAGE for the ligation products of linkers A–B treated with CIAP. PAGE (10×10×0.03 cm, A:B = 19∶1, 7 M urea and 0.5 x TBE) was run in 0.5 x TBE, 25°C, 200 V for 1.7 hrs. The arrows indicate the ligation products. Lane M: DNA marker I (GeneRuler™ 50 bp DNA ladder, Fermentas); Lane M1: DNA marker I +1 µl of 1 µM oligo 15. The ligases used in ( A )–( C ) were T4 DNA ligases. The ligases used in ( D )–( E ) were E. coli DNA ligases. ( A ) CIAP was inactivated at 75°C for 15 min. Lanes 1 and 5∶1 µl of 1 µM oligo 15; Lanes 2: CIAP was inactivated at 75°C for 15 min; Lane 3: the positive control without CIAP treatment; Lane 4: the negative control without ligase. ( B ) CIAP was inactivated at 85°C for 25 min and 45 min. Lanes 1 and 3: the positive controls without CIAP treatment; Lanes 2 and 4: CIAP was inactivated at 85°C for 25 min and 45 min, respectively; Lane 5: the negative control without ligase. ( C ) CIAP was inactivated at 85°C for 65 min and 90 min. Lanes 1 and 3: the positive controls without CIAP treatment; Lanes 2 and 4: CIAP was inactivated at 85°C for 65 min and 90 min, respectively; Lane 5: the negative control without ligase. ( D ) CIAP was inactivated at 85°C for 45 min. Lanes 1 and 3: the positive control without CIAP treatment and the negative control without ligase, respectively; Lane 2: CIAP was inactivated at 85°C for 45 min. ( E ) CIAP was inactivated at 85°C for 65 and 90 min. Lanes 1 and 3: the positive controls without CIAP treatment; Lanes 2 and 4: CIAP was inactivated at 85°C for 65 and 90 min, respectively; Lane 5: the negative control without ligase.

    Article Snippet: Ligations of the linkers with 5′-OH ends The ligations of linkers A–B, C–D, and E–F by using T4 DNA ligase were performed in 100 µl of T4 DNA ligase reaction mixture containing 1 x T4 DNA ligation buffer (40 mM Tris-HCl, 10 mM MgCl2 , 10 mM DTT, and 0.5 mM ATP; pH 7.8 at 25°C), 1 µM of each oligo, and 0.25 Weiss units/µl of T4 DNA ligase (Fermentas, Lithuania; Promega, USA; and Takara, Japan).

    Techniques: Polyacrylamide Gel Electrophoresis, Ligation, Marker, Positive Control, Negative Control

    12% denaturing PAGE for the ligation products of linkers A–B, C–D, and E–F. PAGE (10×10×0.03 cm, A:B = 19∶1, 7 M urea and 0.5 x TBE) was run in 0.5 x TBE, 25°C, 200 V for 1.7 hrs for the ligation products of linkers A–B and C–D, or 100 V for 3.5 hrs for those of linkers E–F. The arrows indicate the ligation products. Lane M: DNA marker I (GeneRuler™ 50 bp DNA ladder, Fermentas); Lane M1: DNA marker I +1 µl of 1 µM oligo 15; Lane M2: pUC19 DNA/MspI Marker (Fermentas). ( A ) The ligation products joined by using T4 DNA ligase from Takara and Fermentas. Lane 1∶1 µl of 1 µM oligo 15; Lanes 2 and 6: the ligation products of linkers A–B joined by using T4 DNA ligase from Takara and Fermentas, respectively. We could see 5 bands. Of them, bands 1 and 2 were from oligos 4 and 1, respectively. Band 3 was from both oligos 2 and 3. Band 4 was unknown. Perhaps it might be the intermixtures of oligos 1–4. Band 5 was the denatured ligation products of linkers A–B; Lanes 4 and 8: the ligation products of linkers C–D joined by using T4 DNA ligase from Takara and Fermentas, respectively. We could see 4 bands. Of them, bands 6 and 7 were from both oligos 6 and 7, and both oligos 5 and 8, respectively. Band 8 was the denatured ligation products of linkers C–D. Band 9 was unknown. Perhaps it might be the intermixtures of oligos 5–8 and the double-strand ligation products of linkers C–D; Lanes 3, 5, 7, and 9: the negative controls. ( B ) The ligation products of linkers A–B and C–D joined by using T4 DNA ligase from Promega and the ligation products of linkers A–B joined in the ligase reaction mixture containing (NH 4 ) 2 SO 4 . Lane 1∶1 µl of 1 µM oligo 15; Lanes 2 and 4: the denatured ligation products of linkers A–B, and C–D, respectively. T4 DNA ligase was from Promega; Lanes 6 and 7: the ligation products of linkers A–B joined in the ligase reaction mixture without (NH 4 ) 2 SO 4 and with (NH 4 ) 2 SO 4 , respectively. T4 DNA ligase used was from Takara; Lanes 3, 5, and 8: the negative controls. ( C ) The ligation products of linkers A–B and C–D joined by using E. coli DNA ligase. Lane 1∶1 µl of 1 µM oligo 15; Lanes 2 and 4: the ligation products of linkers A–B, and C–D, respectively; Lanes 3 and 5: the negative controls. ( D ) The ligation products of linkers E–F joined in the ligase reaction mixture with (NH 4 ) 2 SO 4 . The ligase was T4 DNA ligase (Fermentas). Lane 1: pUC19 DNA/MspI Marker plus 2 µl of ligation products of linkers E–F; Lanes 2 and 3: the ligation products of linkers E–F joined in the ligase reaction mixtures with (NH 4 ) 2 SO 4 , and without (NH 4 ) 2 SO 4 , respectively. We could see 3 bands. Bands 10 and 11 are from both oligos 9 and 12, and both oligos 10 and 11, respectively; Band 12 is the ligation products of linkers E–F; Lane 4: the negative control. ( E ) The ligation products of linkers E–F joined by using E. coli DNA ligase. Lane 1: the ligation products of linkers E–F. Lane 2: the negative control. ( F ) The ligation products of linkers A–B preincubated with T4 PNK in the E. coli DNA ligase reaction mixture without ATP. The ligase was E. coli DNA ligase (Takara). Lane 1∶1 µl of 1 µM oligo 15; Lane 2: linkers A–B were not preincubated with T4 PNK; Lane 3: linkers A–B were preincubated with T4 PNK; Lane 4: the negative control.

    Journal: PLoS ONE

    Article Title: Detection of Ligation Products of DNA Linkers with 5?-OH Ends by Denaturing PAGE Silver Stain

    doi: 10.1371/journal.pone.0039251

    Figure Lengend Snippet: 12% denaturing PAGE for the ligation products of linkers A–B, C–D, and E–F. PAGE (10×10×0.03 cm, A:B = 19∶1, 7 M urea and 0.5 x TBE) was run in 0.5 x TBE, 25°C, 200 V for 1.7 hrs for the ligation products of linkers A–B and C–D, or 100 V for 3.5 hrs for those of linkers E–F. The arrows indicate the ligation products. Lane M: DNA marker I (GeneRuler™ 50 bp DNA ladder, Fermentas); Lane M1: DNA marker I +1 µl of 1 µM oligo 15; Lane M2: pUC19 DNA/MspI Marker (Fermentas). ( A ) The ligation products joined by using T4 DNA ligase from Takara and Fermentas. Lane 1∶1 µl of 1 µM oligo 15; Lanes 2 and 6: the ligation products of linkers A–B joined by using T4 DNA ligase from Takara and Fermentas, respectively. We could see 5 bands. Of them, bands 1 and 2 were from oligos 4 and 1, respectively. Band 3 was from both oligos 2 and 3. Band 4 was unknown. Perhaps it might be the intermixtures of oligos 1–4. Band 5 was the denatured ligation products of linkers A–B; Lanes 4 and 8: the ligation products of linkers C–D joined by using T4 DNA ligase from Takara and Fermentas, respectively. We could see 4 bands. Of them, bands 6 and 7 were from both oligos 6 and 7, and both oligos 5 and 8, respectively. Band 8 was the denatured ligation products of linkers C–D. Band 9 was unknown. Perhaps it might be the intermixtures of oligos 5–8 and the double-strand ligation products of linkers C–D; Lanes 3, 5, 7, and 9: the negative controls. ( B ) The ligation products of linkers A–B and C–D joined by using T4 DNA ligase from Promega and the ligation products of linkers A–B joined in the ligase reaction mixture containing (NH 4 ) 2 SO 4 . Lane 1∶1 µl of 1 µM oligo 15; Lanes 2 and 4: the denatured ligation products of linkers A–B, and C–D, respectively. T4 DNA ligase was from Promega; Lanes 6 and 7: the ligation products of linkers A–B joined in the ligase reaction mixture without (NH 4 ) 2 SO 4 and with (NH 4 ) 2 SO 4 , respectively. T4 DNA ligase used was from Takara; Lanes 3, 5, and 8: the negative controls. ( C ) The ligation products of linkers A–B and C–D joined by using E. coli DNA ligase. Lane 1∶1 µl of 1 µM oligo 15; Lanes 2 and 4: the ligation products of linkers A–B, and C–D, respectively; Lanes 3 and 5: the negative controls. ( D ) The ligation products of linkers E–F joined in the ligase reaction mixture with (NH 4 ) 2 SO 4 . The ligase was T4 DNA ligase (Fermentas). Lane 1: pUC19 DNA/MspI Marker plus 2 µl of ligation products of linkers E–F; Lanes 2 and 3: the ligation products of linkers E–F joined in the ligase reaction mixtures with (NH 4 ) 2 SO 4 , and without (NH 4 ) 2 SO 4 , respectively. We could see 3 bands. Bands 10 and 11 are from both oligos 9 and 12, and both oligos 10 and 11, respectively; Band 12 is the ligation products of linkers E–F; Lane 4: the negative control. ( E ) The ligation products of linkers E–F joined by using E. coli DNA ligase. Lane 1: the ligation products of linkers E–F. Lane 2: the negative control. ( F ) The ligation products of linkers A–B preincubated with T4 PNK in the E. coli DNA ligase reaction mixture without ATP. The ligase was E. coli DNA ligase (Takara). Lane 1∶1 µl of 1 µM oligo 15; Lane 2: linkers A–B were not preincubated with T4 PNK; Lane 3: linkers A–B were preincubated with T4 PNK; Lane 4: the negative control.

    Article Snippet: Ligations of the linkers with 5′-OH ends The ligations of linkers A–B, C–D, and E–F by using T4 DNA ligase were performed in 100 µl of T4 DNA ligase reaction mixture containing 1 x T4 DNA ligation buffer (40 mM Tris-HCl, 10 mM MgCl2 , 10 mM DTT, and 0.5 mM ATP; pH 7.8 at 25°C), 1 µM of each oligo, and 0.25 Weiss units/µl of T4 DNA ligase (Fermentas, Lithuania; Promega, USA; and Takara, Japan).

    Techniques: Polyacrylamide Gel Electrophoresis, Ligation, Marker, Negative Control

    The radioautograph of oligo 11 phosphorylated by T4 DNA ligase. The oligo 11 was phosphorylated by using commercial T4 DNA ligase. The phosphorylation products were loaded on a 15% denaturing PAGE gel (10×10×0.03 cm, A:B = 29∶1, 7 M urea, 0.5 x TBE). Electrophoresis was run in 0.5 x TBE at 100 V and 25°C for 3 hrs. The gel was dried between two semipermeable cellulose acetate membranes and radioautographed at −20°C for 1–3 days. The arrows indicate the phosphorylation products. The positive controls were oligo 11 phosphorylated by T4 PNK. ( A ) Oligo 11 was phosphorylated by T4 DNA ligase at 37°C for 2 hrs. Lanes 1 and 5: the positive controls; Lanes 2 and 4: the negative controls without ligase, and without oligo 11, respectively; Lane 3: the phosphorylation products of oligo 11 by T4 DNA ligase. ( B ) Oligo 11 treated with CIAP was phosphorylated by T4 DNA ligase at 37°C for 2 hrs. Lanes 1 and 5: the positive controls; Lane 2: the phosphorylation products of oligo 11 by T4 DNA ligase; Lanes 3 and 4: the negative controls without ligase, and without oligo 11, respectively; Lanes 6, 7, and 8: oligo 11 treated with CIAP was phosphorylated by T4 DNA ligase. CIAP was inactivated at 85°C for 15 min, 30 min, and 60 min, respectively. Lanes 9 and 10: the negative controls without ligase, and without oligo 11, respectively. ( C ) Oligo 11 treated with CIAP was phosphorylated by T4 DNA ligase at 37°C for 2 hrs. Lanes 1 and 5: the positive controls; Lane 2: the phosphorylation products of oligo 11 by T4 DNA ligase; Lanes 3 and 4: the negative controls without ligase, and without oligo 11, respectively; Lanes 6, 7, and 8: oligo 11 treated with CIAP was phosphorylated by T4 DNA ligase. CIAP was inactivated at 85°C for 60 min, 15 min, and 30 min, respectively. ( D ) Oligos 11 and 12 were phosphorylated by T4 DNA ligase at 37°C for 1 hr. Lane 1: oligos 11 and 12 were phosphorylated by T4 PNK; Lane 2: oligos 11 and 12 were phosphorylated by T4 DNA ligase; Lane 3: oligo 11 were phosphorylated by T4 DNA ligase; Lane 4: the negative control without ligase. ( E ) Oligo 11 was phosphorylated by T4 DNA ligase at 37°C for 2 hrs. 1 x TE and 10% SDS were not added to the phosphorylation products before phenol/chloroform extraction. Lane 1: the positive control; Lanes 2 and 3: the phosphorylation products of oligo 11 by T4 DNA ligase and the negative controls without ligase, respectively.

    Journal: PLoS ONE

    Article Title: Detection of Ligation Products of DNA Linkers with 5?-OH Ends by Denaturing PAGE Silver Stain

    doi: 10.1371/journal.pone.0039251

    Figure Lengend Snippet: The radioautograph of oligo 11 phosphorylated by T4 DNA ligase. The oligo 11 was phosphorylated by using commercial T4 DNA ligase. The phosphorylation products were loaded on a 15% denaturing PAGE gel (10×10×0.03 cm, A:B = 29∶1, 7 M urea, 0.5 x TBE). Electrophoresis was run in 0.5 x TBE at 100 V and 25°C for 3 hrs. The gel was dried between two semipermeable cellulose acetate membranes and radioautographed at −20°C for 1–3 days. The arrows indicate the phosphorylation products. The positive controls were oligo 11 phosphorylated by T4 PNK. ( A ) Oligo 11 was phosphorylated by T4 DNA ligase at 37°C for 2 hrs. Lanes 1 and 5: the positive controls; Lanes 2 and 4: the negative controls without ligase, and without oligo 11, respectively; Lane 3: the phosphorylation products of oligo 11 by T4 DNA ligase. ( B ) Oligo 11 treated with CIAP was phosphorylated by T4 DNA ligase at 37°C for 2 hrs. Lanes 1 and 5: the positive controls; Lane 2: the phosphorylation products of oligo 11 by T4 DNA ligase; Lanes 3 and 4: the negative controls without ligase, and without oligo 11, respectively; Lanes 6, 7, and 8: oligo 11 treated with CIAP was phosphorylated by T4 DNA ligase. CIAP was inactivated at 85°C for 15 min, 30 min, and 60 min, respectively. Lanes 9 and 10: the negative controls without ligase, and without oligo 11, respectively. ( C ) Oligo 11 treated with CIAP was phosphorylated by T4 DNA ligase at 37°C for 2 hrs. Lanes 1 and 5: the positive controls; Lane 2: the phosphorylation products of oligo 11 by T4 DNA ligase; Lanes 3 and 4: the negative controls without ligase, and without oligo 11, respectively; Lanes 6, 7, and 8: oligo 11 treated with CIAP was phosphorylated by T4 DNA ligase. CIAP was inactivated at 85°C for 60 min, 15 min, and 30 min, respectively. ( D ) Oligos 11 and 12 were phosphorylated by T4 DNA ligase at 37°C for 1 hr. Lane 1: oligos 11 and 12 were phosphorylated by T4 PNK; Lane 2: oligos 11 and 12 were phosphorylated by T4 DNA ligase; Lane 3: oligo 11 were phosphorylated by T4 DNA ligase; Lane 4: the negative control without ligase. ( E ) Oligo 11 was phosphorylated by T4 DNA ligase at 37°C for 2 hrs. 1 x TE and 10% SDS were not added to the phosphorylation products before phenol/chloroform extraction. Lane 1: the positive control; Lanes 2 and 3: the phosphorylation products of oligo 11 by T4 DNA ligase and the negative controls without ligase, respectively.

    Article Snippet: Ligations of the linkers with 5′-OH ends The ligations of linkers A–B, C–D, and E–F by using T4 DNA ligase were performed in 100 µl of T4 DNA ligase reaction mixture containing 1 x T4 DNA ligation buffer (40 mM Tris-HCl, 10 mM MgCl2 , 10 mM DTT, and 0.5 mM ATP; pH 7.8 at 25°C), 1 µM of each oligo, and 0.25 Weiss units/µl of T4 DNA ligase (Fermentas, Lithuania; Promega, USA; and Takara, Japan).

    Techniques: Polyacrylamide Gel Electrophoresis, Electrophoresis, Negative Control, Positive Control

    Graphical Visualization of the 3′ RACE-Seq Approach, Related to Figure 2 (A) Graphical representation of 3′ RACE-seq library preparation and the oligonucleotides used. First, the 3′ adaptor RA3_15N was joined to the 3′ end of RNA by enzymatic ligation. The adaptor has: (i) 5′ rApp modification for efficient and specific ligation by the truncated T4 RNA ligase 2, (ii) delimiter sequence to be used in bioinformatics analyses to exclude RT and PCR artifacts (CTGAC, highlighted in violet), (iii) unique 15N barcode for individual transcript barcoding (highlighted in green), (iv) anchor sequence to pair with the reverse transcription primer (underlined) and (v) dideoxyC on the 3′ end to prevent concatamer formation. The RNA ligated to the adaptor sequence was purified from excess adaptor and reverse transcription was performed with the RT primer, which is compatible with Illumina sequencing and has: (i) sequences to base-pair with the adaptor (underlined), (ii) 6-nucleotide barcode for sample barcoding (highlighted in red), (iii) sequences that base pair with the universal outer primer for nested PCR (blue). Libraries were generated by nested PCR with 2 outer forward primers (F1 and F2) and a single universal reverse primer (uni rev). PCR amplicons of first and second PCRs were purified from excess primers on AmPure beads (Agencourt) before beginning the next step. (B) Flowchart of the bioinformatics approach to 3′ RACE-seq data analysis. The procedure starts at the top. Datasets are shown in rectangles. Software used is depicted in hexagons.

    Journal: Cell

    Article Title: Uridylation by TUT4/7 Restricts Retrotransposition of Human LINE-1s

    doi: 10.1016/j.cell.2018.07.022

    Figure Lengend Snippet: Graphical Visualization of the 3′ RACE-Seq Approach, Related to Figure 2 (A) Graphical representation of 3′ RACE-seq library preparation and the oligonucleotides used. First, the 3′ adaptor RA3_15N was joined to the 3′ end of RNA by enzymatic ligation. The adaptor has: (i) 5′ rApp modification for efficient and specific ligation by the truncated T4 RNA ligase 2, (ii) delimiter sequence to be used in bioinformatics analyses to exclude RT and PCR artifacts (CTGAC, highlighted in violet), (iii) unique 15N barcode for individual transcript barcoding (highlighted in green), (iv) anchor sequence to pair with the reverse transcription primer (underlined) and (v) dideoxyC on the 3′ end to prevent concatamer formation. The RNA ligated to the adaptor sequence was purified from excess adaptor and reverse transcription was performed with the RT primer, which is compatible with Illumina sequencing and has: (i) sequences to base-pair with the adaptor (underlined), (ii) 6-nucleotide barcode for sample barcoding (highlighted in red), (iii) sequences that base pair with the universal outer primer for nested PCR (blue). Libraries were generated by nested PCR with 2 outer forward primers (F1 and F2) and a single universal reverse primer (uni rev). PCR amplicons of first and second PCRs were purified from excess primers on AmPure beads (Agencourt) before beginning the next step. (B) Flowchart of the bioinformatics approach to 3′ RACE-seq data analysis. The procedure starts at the top. Datasets are shown in rectangles. Software used is depicted in hexagons.

    Article Snippet: The reactions were carried out in 20 μL with 1x T4 RNA ligase 2 truncated buffer (NEB) supplemented with PEG-8000 at 10% final concentration, 0.25 U/μl RiboLock inhibitor (Thermo Fisher Scientific), 3 pmol of the 5′ FAM-labeled 44-mer oligonucleotide RNA44 (Future Synthesis) and 300 U T4 RNA ligase 2 truncated (NEB) for 18h at 18°C.

    Techniques: Ligation, Modification, Sequencing, Polymerase Chain Reaction, Purification, Nested PCR, Generated, Software