neb cutsmart buffer  (New England Biolabs)


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    Name:
    CutSmart Buffer
    Description:
    CutSmart Buffer 5 0 ml
    Catalog Number:
    B7204S
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    24
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    Buffers
    Size:
    5 0 ml
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    Structured Review

    New England Biolabs neb cutsmart buffer
    CutSmart Buffer
    CutSmart Buffer 5 0 ml
    https://www.bioz.com/result/neb cutsmart buffer/product/New England Biolabs
    Average 99 stars, based on 1 article reviews
    Price from $9.99 to $1999.99
    neb cutsmart buffer - by Bioz Stars, 2021-07
    99/100 stars

    Images

    1) Product Images from "Identification of an Intermediate in Hepatitis B Virus Covalently Closed Circular (CCC) DNA Formation and Sensitive and Selective CCC DNA Detection"

    Article Title: Identification of an Intermediate in Hepatitis B Virus Covalently Closed Circular (CCC) DNA Formation and Sensitive and Selective CCC DNA Detection

    Journal: Journal of Virology

    doi: 10.1128/JVI.00539-17

    Exo I III versus Exo T5 digestion of plasmid DNA. (A) Diagrams showing expected digestion results of various plasmid DNA species. A break in the circle denotes the nick on the DNA strand. (B and C) Plasmid pCI-HBc (2.5 ng) was mixed with 20 μl of mock PF DNA extracted from uninduced HepAD38 cells. The DNA mix was first treated with Nb.BbvCI (5 units) to nick the plasmid DNA specifically on the minus strand (B and C, lanes 5 to 8) or was left untreated (B and C, lanes 1 to 4) before digestion with Exo I III (5 units and 25 units, respectively) in two different buffers or with Exo T5 (5 units). The DNA samples were then resolved on an agarose gel, and HBc DNA was detected by Southern blotting using a riboprobe specific for the viral plus-strand (B) or minus-strand (C) DNA. The diagrams on the right of panel C depict the various DNA species and their migration on the gel. B3, 1× NEB buffer 3; BCS, 1× NEB buffer Cutsmart; PE, phenol extraction.
    Figure Legend Snippet: Exo I III versus Exo T5 digestion of plasmid DNA. (A) Diagrams showing expected digestion results of various plasmid DNA species. A break in the circle denotes the nick on the DNA strand. (B and C) Plasmid pCI-HBc (2.5 ng) was mixed with 20 μl of mock PF DNA extracted from uninduced HepAD38 cells. The DNA mix was first treated with Nb.BbvCI (5 units) to nick the plasmid DNA specifically on the minus strand (B and C, lanes 5 to 8) or was left untreated (B and C, lanes 1 to 4) before digestion with Exo I III (5 units and 25 units, respectively) in two different buffers or with Exo T5 (5 units). The DNA samples were then resolved on an agarose gel, and HBc DNA was detected by Southern blotting using a riboprobe specific for the viral plus-strand (B) or minus-strand (C) DNA. The diagrams on the right of panel C depict the various DNA species and their migration on the gel. B3, 1× NEB buffer 3; BCS, 1× NEB buffer Cutsmart; PE, phenol extraction.

    Techniques Used: Plasmid Preparation, Agarose Gel Electrophoresis, Southern Blot, Migration

    Exo I III versus Exo T5 digestion of HBV core and PF DNA. (A) Diagrams showing expected results of digestion with various HBV PF DNA species. Left, structures of known and potential HBV PF DNA species; middle and right, expected digestion products of the various DNA species. The DNA species in the rectangular box, with a covalently closed minus strand and an open plus strand, represents a potential intermediate during RC DNA to CCC DNA conversion that was identified in the current study (see the text for details). The black dot at the 5′ end of the minus strand of the PF-RC and PF-DSL DNA denotes the unknown modification of this end upon removal of the RT protein (deproteination; see the text for details). (B and C) HBV core DNA (0.3 μl) combined with mock PF DNA (20 μl) extracted from uninduced HepAD38 cells (B) or PF DNA (20 μl) extracted from induced HepAD38 cells (C) was treated with Exo I III (5 units and 25 units, respectively) (lanes 3 and 10) or Exo T5 (5 units) (lanes 6 and 13) in 1× NEB CutSmart buffer. Subsequently, MfeI-HF (10 units) was used to linearize CCC DNA (lanes 5, 7, 12, and 14) and Exo T5 (5 units) was used to digest the SS circular DNA (lanes 4 and 11). Heat treatment (95°C, 10 min) was used to denature RC DNA to SS linear DNA (lanes 2 and 9). The DNA samples were then resolved on an agarose gel, and the various HBV DNA species were detected by Southern blotting using a riboprobe specific for the plus-strand (lanes 1 to 7) or minus-strand (lanes 8 to 14) DNA. The diagrams on the sides depict the various DNA species and their migration on the gel. The positions of the various RC DNA species, CCC DNA species, and SS linear and circular DNA species are indicated by the schematic diagrams. Note that the linearized CCC DNA comigrates with the DSL DNA, a minor form present in both core DNA and PF DNA (lanes 1 and 8).
    Figure Legend Snippet: Exo I III versus Exo T5 digestion of HBV core and PF DNA. (A) Diagrams showing expected results of digestion with various HBV PF DNA species. Left, structures of known and potential HBV PF DNA species; middle and right, expected digestion products of the various DNA species. The DNA species in the rectangular box, with a covalently closed minus strand and an open plus strand, represents a potential intermediate during RC DNA to CCC DNA conversion that was identified in the current study (see the text for details). The black dot at the 5′ end of the minus strand of the PF-RC and PF-DSL DNA denotes the unknown modification of this end upon removal of the RT protein (deproteination; see the text for details). (B and C) HBV core DNA (0.3 μl) combined with mock PF DNA (20 μl) extracted from uninduced HepAD38 cells (B) or PF DNA (20 μl) extracted from induced HepAD38 cells (C) was treated with Exo I III (5 units and 25 units, respectively) (lanes 3 and 10) or Exo T5 (5 units) (lanes 6 and 13) in 1× NEB CutSmart buffer. Subsequently, MfeI-HF (10 units) was used to linearize CCC DNA (lanes 5, 7, 12, and 14) and Exo T5 (5 units) was used to digest the SS circular DNA (lanes 4 and 11). Heat treatment (95°C, 10 min) was used to denature RC DNA to SS linear DNA (lanes 2 and 9). The DNA samples were then resolved on an agarose gel, and the various HBV DNA species were detected by Southern blotting using a riboprobe specific for the plus-strand (lanes 1 to 7) or minus-strand (lanes 8 to 14) DNA. The diagrams on the sides depict the various DNA species and their migration on the gel. The positions of the various RC DNA species, CCC DNA species, and SS linear and circular DNA species are indicated by the schematic diagrams. Note that the linearized CCC DNA comigrates with the DSL DNA, a minor form present in both core DNA and PF DNA (lanes 1 and 8).

    Techniques Used: Countercurrent Chromatography, Modification, Agarose Gel Electrophoresis, Southern Blot, Migration

    Confirmation of the closed circular minus strand in the processed RC DNA by BmgBI or Nt.BbvCI and Exo I III digestion. (A and D) Diagrams showing expected results of digestion performed with various HBV PF DNA species. The short line intersecting the circle denotes the site of BmgBI digestion (A) or Nt.BbvCI nicking (D). The presence of the RNA (short gray line) at the 5′ end of the plus strand in RC DNA prevents BmgBI digestion (panel A; arrow blocked by a short line). The black dot at the 5′ end of the minus strand of the PF-RC DNA denotes the unknown modification of this end upon removal of the RT protein. The DNA species indicated in the rectangular box, with a covalently closed minus strand and an open plus strand, represents a potential intermediate during RC DNA to CCC DNA conversion that was identified in this study (see the text for details). (B and C) HBV core DNA (0.3 μl) combined with mock PF DNA (20 μl) extracted from uninduced HepAD38 cells (lanes 1 to 3) or PF DNA (lanes 4 to 6) extracted from induced HepAD38 cells was treated with BmgBI (5 units) in 1× NEB buffer 3 to linearize all supercoiled and nicked CCC DNA (lanes 2, 3, 5, and 6) or was mock treated (lanes 1 and 4). For lanes 3 and 6, the DNA samples were further digested with Exo I III after BmgBI treatment. The samples were then resolved on an agarose gel, and various HBV DNA species were detected by Southern blotting using a riboprobe specific for the viral plus-strand (B) or minus-strand (C) DNA. The diagrams on the right of panel C depict the various DNA species and their migration on the gel. (E) PF DNA extracted from induced HepAD38 cells was treated with Nt.BbvCI (5 units) in 1× NEB Cutsmart buffer to nick all CCC DNA (lanes 3, 4, 7, and 8) or mock treated (lanes 1 and 5). For lanes 4 and 8, the DNA samples were further digested with Exo I III after Nt.BbvCI treatment. The samples were then resolved on an agarose gel, and various HBV DNA species were detected by Southern blotting using a riboprobe specific for the viral plus-strand (lanes 1 to 4) or minus-strand (lanes 5 to 8) DNA. The diagrams on the right depict the various DNA species and their migration on the gel. Marker, the DNA marker lane. The size of the DNA markers is indicated (in kilobase pairs). The blank spaces between the lanes in panels B, C, and E indicate where other lanes from the same gel that were deemed nonessential for this work were cropped out during the preparation of the figure.
    Figure Legend Snippet: Confirmation of the closed circular minus strand in the processed RC DNA by BmgBI or Nt.BbvCI and Exo I III digestion. (A and D) Diagrams showing expected results of digestion performed with various HBV PF DNA species. The short line intersecting the circle denotes the site of BmgBI digestion (A) or Nt.BbvCI nicking (D). The presence of the RNA (short gray line) at the 5′ end of the plus strand in RC DNA prevents BmgBI digestion (panel A; arrow blocked by a short line). The black dot at the 5′ end of the minus strand of the PF-RC DNA denotes the unknown modification of this end upon removal of the RT protein. The DNA species indicated in the rectangular box, with a covalently closed minus strand and an open plus strand, represents a potential intermediate during RC DNA to CCC DNA conversion that was identified in this study (see the text for details). (B and C) HBV core DNA (0.3 μl) combined with mock PF DNA (20 μl) extracted from uninduced HepAD38 cells (lanes 1 to 3) or PF DNA (lanes 4 to 6) extracted from induced HepAD38 cells was treated with BmgBI (5 units) in 1× NEB buffer 3 to linearize all supercoiled and nicked CCC DNA (lanes 2, 3, 5, and 6) or was mock treated (lanes 1 and 4). For lanes 3 and 6, the DNA samples were further digested with Exo I III after BmgBI treatment. The samples were then resolved on an agarose gel, and various HBV DNA species were detected by Southern blotting using a riboprobe specific for the viral plus-strand (B) or minus-strand (C) DNA. The diagrams on the right of panel C depict the various DNA species and their migration on the gel. (E) PF DNA extracted from induced HepAD38 cells was treated with Nt.BbvCI (5 units) in 1× NEB Cutsmart buffer to nick all CCC DNA (lanes 3, 4, 7, and 8) or mock treated (lanes 1 and 5). For lanes 4 and 8, the DNA samples were further digested with Exo I III after Nt.BbvCI treatment. The samples were then resolved on an agarose gel, and various HBV DNA species were detected by Southern blotting using a riboprobe specific for the viral plus-strand (lanes 1 to 4) or minus-strand (lanes 5 to 8) DNA. The diagrams on the right depict the various DNA species and their migration on the gel. Marker, the DNA marker lane. The size of the DNA markers is indicated (in kilobase pairs). The blank spaces between the lanes in panels B, C, and E indicate where other lanes from the same gel that were deemed nonessential for this work were cropped out during the preparation of the figure.

    Techniques Used: Modification, Countercurrent Chromatography, Agarose Gel Electrophoresis, Southern Blot, Migration, Marker

    Related Articles

    Plasmid Preparation:

    Article Title: Restriction Endonucleases from Invasive Neisseria gonorrhoeae Cause Double-Strand Breaks and Distort Mitosis in Epithelial Cells during Infection
    Article Snippet: .. Portions of lysates were further heat inactivated (HI) at 95°C for 10 min. One µg of the commercial plasmid pECFP-N1 (Clonetech, CA, USA) was subjected to either MS11 P+ lysate or HI lysate together with CutSmart buffer (New England Biolabs, Ipswich, MA, USA) for 1 h. As controls, circular/uncut pECFP-N1 was used as well as HindIII (Roche, Mannheim, Germany) linearized pECFP-N1. .. The plasmid reactions were run on 1% agarose gel electrophoresis in 1xTBE buffer and stained with ethidium bromide.

    Article Title: Exonuclease combinations reduce noises in 3D genomics technologies
    Article Snippet: Exonuclease combination pre-tests for linearized DNA elimination The pGL4.23 (4283 bp, P1) ( ) and pCDNA3.1-NLS-NgAgo (8246 bp, P2) plasmids were extracted, using Endo-free Plasmid Mini Kit II (E.Z.N.A.® , D6950). .. Linearized plasmid DNA was obtained in the following 200 μl solution/per reaction, including 23.4 μl plasmid, 5 μl BamHI-HF (HindIII for P2) (NEB), 20 μl 10× Cutsmart Buffer (NEBuffer 2 for P2) and 151.6 μl H2 O. .. Three reactions were performed at 37°C for 1 h. To increase the yield of linearized plasmid DNA, three digested solutions were combined, followed by addition of 1.2-fold phenol/chloroform/isoamyl alcohol for DNA extraction ( ).

    Polymerase Chain Reaction:

    Article Title: A simple and efficient cloning system for CRISPR/Cas9-mediated genome editing in rice
    Article Snippet: Primers containing adaptors for Golden Gate cloning (OJH307 and OJH308, ) were used in the amplification with PJG090 as the template. .. The reagents were recommended as following: one ul of PCR product, 50 ng of PJG112, 1 ul of Cutsmart Buffer (NEB), 0.4 ul of T4 ligase buffer (NEB), 5 U of Bsa I (NEB), 20 U of T4 DNA ligase (NEB) and add ddH2 O to 10 ul. ..

    Isolation:

    Article Title: Depurination of colibactin-derived interstrand cross-links
    Article Snippet: Plasmid Linearization Test The pUC19 DNA isolated from plasmid cleavage assays with E. coli. was used for the plasmid linearization test. .. To set up the linearization reactions, 20 units of EcoRI-HF® (New England Biolabs®) was mixed with 500 ng of isolated DNA (40 units/µg DNA) in CutSmart® buffer (New England Biolabs®), pH 7.9, in a total volume of 50 µL for 30 min at 37 °C. .. The CutSmart® buffer (New England Biolabs®) contains 50 mM potassium acetate, 20 mM Tris-acetate, 10 mM magnesium acetate, and 100 µg/mL BSA.

    Article Title: Depurination of colibactin-derived interstrand cross-links.
    Article Snippet: The pUC19 DNA isolated from plasmid cleavage assays with E. coli . was used for the plasmid linearization test. .. To set up the linearization reactions, 20 units of EcoRI-HF® (New England Biolabs®) was mixed with 500 ng of isolated DNA (40 units/μg DNA) in CutSmart® buffer (New England Biolabs®), pH 7.9, in a total volume of 50 μL for 30 min at 37 °C. .. The CutSmart® buffer (New England Biolabs®) contains 50 mM potassium acetate, 20 mM Tris-acetate, 10 mM magnesium acetate, and 100 μg/mL BSA.

    Article Title: Depurination of colibactin-derived interstrand cross-links
    Article Snippet: The CutSmart® buffer (New England Biolabs®) contains 50 mM potassium acetate, 20 mM Tris-acetate, 10 mM magnesium acetate, and 100 µg/mL BSA. .. To set up the negative control reactions, 500 ng of isolated DNA was treated with CutSmart buffer® (New England Biolabs®), pH 7.9, in a total volume of 50 µL for 30 min at 37 °C. .. The reacted DNA was then purified using PCR clean-up kit (New England Biolabs®) and quantified using the nanodrop.

    Negative Control:

    Article Title: Depurination of colibactin-derived interstrand cross-links
    Article Snippet: The CutSmart® buffer (New England Biolabs®) contains 50 mM potassium acetate, 20 mM Tris-acetate, 10 mM magnesium acetate, and 100 µg/mL BSA. .. To set up the negative control reactions, 500 ng of isolated DNA was treated with CutSmart buffer® (New England Biolabs®), pH 7.9, in a total volume of 50 µL for 30 min at 37 °C. .. The reacted DNA was then purified using PCR clean-up kit (New England Biolabs®) and quantified using the nanodrop.

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  • 94
    New England Biolabs nb btsi
    Library quality control and anticipated results. ( a ) Sonicated DNA separated by agarose gel electrophoresis (Step 25) shows an average fragment size of approximately 400 bp. ( b ) Bioanalyzer result (Step 84) for an emRiboSeq library shows a typical trace (left) and gel-like image (right) with a peak for fragments between ˜180 and ˜300 bp in size (black bar). Standards (green and purple bars) of defined size and amount allow quantification. FU, arbitrary fluorescence units. ( c ) Agarose gel electrophoresis of PCR products after 15, 16 and 17 cycles of amplification (Steps 81-83) of the same library shows product between 200 and 300 bp in size. ( d ) Sequencing results for libraries generated using <t>Nb.BtsI</t> are highly reproducibility between different strains (POL, wildtype polymerase; pol1-L868M, increased Pol-α ribonucleotide incorporation) after normalizing read counts to sequence tags per million (TPM). The majority of bona fide Nb.BtsI sites were present at maximal frequency, although some sites were present at lower frequencies. This is the result of partial loss during size selection because of their close proximity to other cleavage sites, a highly reproducible finding between independent libraries (Spearman's rho=0.82, p
    Nb Btsi, supplied by New England Biolabs, used in various techniques. Bioz Stars score: 94/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    99
    New England Biolabs cutsmart buffer
    Analysis of pUC19 DNA following treatment with clb − or clb + E. coli and linearization with the restriction enzyme EcoRI. The cross-linked linearized pUC19 DNA isolated from a co-culture with clb + BW25113 E. coli was used a positive control. A . Analysis of DNA by native gel electrophoresis. B . Analysis of DNA by denaturing gel electrophoresis. For both A and B: DNA ladder (Lane #1); circular pUC19 DNA standard (Lane #2); linearized pUC19 DNA standard (Lane # 3); linearized pUC19 DNA co-cultured with clb + BW25113 E. coli (Lane #4); circular pUC19 DNA isolated from co-culture with clb − BW25113 E. coli (Lane #5), reacted with buffer (Lane #6), reacted with EcoRI restriction enzyme (Lane #7); circular pUC19 DNA isolated from co-culture with clb + BW25113 E. coli (Lane #8), reacted with buffer (Lane #9), reacted with EcoRI restriction enzyme (Lane #10). Conditions (Lane #4): linearized pUC19 DNA, clb + BW25113 E. coli , M9-CA media, 4 h at 37 °C. Conditions (Lane #5–#7): circular pUC19 DNA isolated from co-culture with clb − BW25113 E. coli in M9-CA media for 4 h at 37 °C (Lane #5); the DNA (15.4 μM base pair) was reacted with <t>CutSmart</t> Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #6); the DNA (15.4 μM base pair) was reacted with 20 units of EcoRI-HF restriction enzyme in CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #7). Conditions (Lane #8–#10): circular pUC19 DNA isolated from co-culture with BW25113 clb + E. coli . in in M9-CA media for 4 h at 37 °C (Lane # 8); the DNA (15.4 μM base pair) was reacted with CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #9); the DNA (15.4 μM base pair) was reacted with 20 units of EcoRI-HF restriction enzyme in CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #10). The DNA was isolated and analyzed by native (Fig. 5A) or 0.4% NaOH denaturing (Fig. 5B) agarose gel electrophoresis (90 V, 1.5 h). SC = supercoiled, nicked = SSB, linear = DSB, SC-denat. = supercoiled DNA in denaturing form, linear-denat. = DSB/linearized DNA in denaturing form, nicked-XL = SSB DNA cross-linked by colibactin, linear-XL = DSB/linerized DNA cross-linked by colibactin.
    Cutsmart Buffer, supplied by New England Biolabs, used in various techniques. Bioz Stars score: 99/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/cutsmart buffer/product/New England Biolabs
    Average 99 stars, based on 1 article reviews
    Price from $9.99 to $1999.99
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    Library quality control and anticipated results. ( a ) Sonicated DNA separated by agarose gel electrophoresis (Step 25) shows an average fragment size of approximately 400 bp. ( b ) Bioanalyzer result (Step 84) for an emRiboSeq library shows a typical trace (left) and gel-like image (right) with a peak for fragments between ˜180 and ˜300 bp in size (black bar). Standards (green and purple bars) of defined size and amount allow quantification. FU, arbitrary fluorescence units. ( c ) Agarose gel electrophoresis of PCR products after 15, 16 and 17 cycles of amplification (Steps 81-83) of the same library shows product between 200 and 300 bp in size. ( d ) Sequencing results for libraries generated using Nb.BtsI are highly reproducibility between different strains (POL, wildtype polymerase; pol1-L868M, increased Pol-α ribonucleotide incorporation) after normalizing read counts to sequence tags per million (TPM). The majority of bona fide Nb.BtsI sites were present at maximal frequency, although some sites were present at lower frequencies. This is the result of partial loss during size selection because of their close proximity to other cleavage sites, a highly reproducible finding between independent libraries (Spearman's rho=0.82, p

    Journal: Nature protocols

    Article Title: Genome-wide mapping of embedded ribonucleotides and other non-canonical nucleotides using emRiboSeq and EndoSeq

    doi: 10.1038/nprot.2015.099

    Figure Lengend Snippet: Library quality control and anticipated results. ( a ) Sonicated DNA separated by agarose gel electrophoresis (Step 25) shows an average fragment size of approximately 400 bp. ( b ) Bioanalyzer result (Step 84) for an emRiboSeq library shows a typical trace (left) and gel-like image (right) with a peak for fragments between ˜180 and ˜300 bp in size (black bar). Standards (green and purple bars) of defined size and amount allow quantification. FU, arbitrary fluorescence units. ( c ) Agarose gel electrophoresis of PCR products after 15, 16 and 17 cycles of amplification (Steps 81-83) of the same library shows product between 200 and 300 bp in size. ( d ) Sequencing results for libraries generated using Nb.BtsI are highly reproducibility between different strains (POL, wildtype polymerase; pol1-L868M, increased Pol-α ribonucleotide incorporation) after normalizing read counts to sequence tags per million (TPM). The majority of bona fide Nb.BtsI sites were present at maximal frequency, although some sites were present at lower frequencies. This is the result of partial loss during size selection because of their close proximity to other cleavage sites, a highly reproducible finding between independent libraries (Spearman's rho=0.82, p

    Article Snippet: CRITICAL: alternative sources of recombinant type 2 RNase H enzymes may be used 10% (wt/vol) Bovine Serum Albumin Fraction V (BSA, Roche, cat. no. 10 735 086 001) Magnesium chloride (MgCl2 , Sigma, cat. no. M2670) Nb.BtsI, Supplied with 10x CutSmart® buffer (New England Biolabs, cat. no. R0707) BciVI, Supplied with 10x CutSmart® buffer (New England Biolabs, cat. no. R0596) Shrimp Alkaline Phosphatase (SAP), supplied with 10x reaction buffer (Affymetrix USB® , cat. no. 70092Z) Dynabeads® M-280 Streptavidin (Life Technologies, cat. no. 11205D) Tri-sodium citrate (Sigma, cat. no. C8532) Glycogen (Roche, cat. no. 10 901 393 001) Sodium acetate (NaOAc, Sigma, cat. no. S2889) Sodium hydroxide (NaOH, Sigma, cat. no. 38215) CAUTION Sodium hydroxide is corrosive.

    Techniques: Sonication, Agarose Gel Electrophoresis, Fluorescence, Polymerase Chain Reaction, Amplification, Sequencing, Generated, Selection

    Analysis of pUC19 DNA following treatment with clb − or clb + E. coli and linearization with the restriction enzyme EcoRI. The cross-linked linearized pUC19 DNA isolated from a co-culture with clb + BW25113 E. coli was used a positive control. A . Analysis of DNA by native gel electrophoresis. B . Analysis of DNA by denaturing gel electrophoresis. For both A and B: DNA ladder (Lane #1); circular pUC19 DNA standard (Lane #2); linearized pUC19 DNA standard (Lane # 3); linearized pUC19 DNA co-cultured with clb + BW25113 E. coli (Lane #4); circular pUC19 DNA isolated from co-culture with clb − BW25113 E. coli (Lane #5), reacted with buffer (Lane #6), reacted with EcoRI restriction enzyme (Lane #7); circular pUC19 DNA isolated from co-culture with clb + BW25113 E. coli (Lane #8), reacted with buffer (Lane #9), reacted with EcoRI restriction enzyme (Lane #10). Conditions (Lane #4): linearized pUC19 DNA, clb + BW25113 E. coli , M9-CA media, 4 h at 37 °C. Conditions (Lane #5–#7): circular pUC19 DNA isolated from co-culture with clb − BW25113 E. coli in M9-CA media for 4 h at 37 °C (Lane #5); the DNA (15.4 μM base pair) was reacted with CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #6); the DNA (15.4 μM base pair) was reacted with 20 units of EcoRI-HF restriction enzyme in CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #7). Conditions (Lane #8–#10): circular pUC19 DNA isolated from co-culture with BW25113 clb + E. coli . in in M9-CA media for 4 h at 37 °C (Lane # 8); the DNA (15.4 μM base pair) was reacted with CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #9); the DNA (15.4 μM base pair) was reacted with 20 units of EcoRI-HF restriction enzyme in CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #10). The DNA was isolated and analyzed by native (Fig. 5A) or 0.4% NaOH denaturing (Fig. 5B) agarose gel electrophoresis (90 V, 1.5 h). SC = supercoiled, nicked = SSB, linear = DSB, SC-denat. = supercoiled DNA in denaturing form, linear-denat. = DSB/linearized DNA in denaturing form, nicked-XL = SSB DNA cross-linked by colibactin, linear-XL = DSB/linerized DNA cross-linked by colibactin.

    Journal: Biochemistry

    Article Title: Depurination of colibactin-derived interstrand cross-links.

    doi: 10.1021/acs.biochem.9b01070

    Figure Lengend Snippet: Analysis of pUC19 DNA following treatment with clb − or clb + E. coli and linearization with the restriction enzyme EcoRI. The cross-linked linearized pUC19 DNA isolated from a co-culture with clb + BW25113 E. coli was used a positive control. A . Analysis of DNA by native gel electrophoresis. B . Analysis of DNA by denaturing gel electrophoresis. For both A and B: DNA ladder (Lane #1); circular pUC19 DNA standard (Lane #2); linearized pUC19 DNA standard (Lane # 3); linearized pUC19 DNA co-cultured with clb + BW25113 E. coli (Lane #4); circular pUC19 DNA isolated from co-culture with clb − BW25113 E. coli (Lane #5), reacted with buffer (Lane #6), reacted with EcoRI restriction enzyme (Lane #7); circular pUC19 DNA isolated from co-culture with clb + BW25113 E. coli (Lane #8), reacted with buffer (Lane #9), reacted with EcoRI restriction enzyme (Lane #10). Conditions (Lane #4): linearized pUC19 DNA, clb + BW25113 E. coli , M9-CA media, 4 h at 37 °C. Conditions (Lane #5–#7): circular pUC19 DNA isolated from co-culture with clb − BW25113 E. coli in M9-CA media for 4 h at 37 °C (Lane #5); the DNA (15.4 μM base pair) was reacted with CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #6); the DNA (15.4 μM base pair) was reacted with 20 units of EcoRI-HF restriction enzyme in CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #7). Conditions (Lane #8–#10): circular pUC19 DNA isolated from co-culture with BW25113 clb + E. coli . in in M9-CA media for 4 h at 37 °C (Lane # 8); the DNA (15.4 μM base pair) was reacted with CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #9); the DNA (15.4 μM base pair) was reacted with 20 units of EcoRI-HF restriction enzyme in CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #10). The DNA was isolated and analyzed by native (Fig. 5A) or 0.4% NaOH denaturing (Fig. 5B) agarose gel electrophoresis (90 V, 1.5 h). SC = supercoiled, nicked = SSB, linear = DSB, SC-denat. = supercoiled DNA in denaturing form, linear-denat. = DSB/linearized DNA in denaturing form, nicked-XL = SSB DNA cross-linked by colibactin, linear-XL = DSB/linerized DNA cross-linked by colibactin.

    Article Snippet: The CutSmart® buffer (New England Biolabs®) contains 50 mM potassium acetate, 20 mM Tris-acetate, 10 mM magnesium acetate, and 100 μg/mL BSA.

    Techniques: Isolation, Co-Culture Assay, Positive Control, Nucleic Acid Electrophoresis, Cell Culture, Agarose Gel Electrophoresis

    Schematic overview of droplet Tn-Seq. a A microfluidic device encapsulates single bacterial cells into droplets containing growth medium. Bacteria are allowed to grow within droplets, genomic DNA (gDNA) is isolated at the start of the experiment (t1) and after growth (t2). Importantly, while growth for each transposon mutant takes place in isolation, gDNA is isolated from the pooled population, enabling screening of all mutants simultaneously. b gDNA is then amplified with DNA polymerase phi29, digested with MmeI, an adapter is ligated, a ~180 bp fragment is produced which contains ~16 nucleotides of bacterial gDNA, defining the transposon-insertion location, followed by Illumina sequencing. Reads are demultiplexed based on the barcode in the adapter and a potential second barcode in primer 1, mapped to the genome, and fitness is calculated for each defined region.

    Journal: Nature Communications

    Article Title: Droplet Tn-Seq combines microfluidics with Tn-Seq for identifying complex single-cell phenotypes

    doi: 10.1038/s41467-019-13719-9

    Figure Lengend Snippet: Schematic overview of droplet Tn-Seq. a A microfluidic device encapsulates single bacterial cells into droplets containing growth medium. Bacteria are allowed to grow within droplets, genomic DNA (gDNA) is isolated at the start of the experiment (t1) and after growth (t2). Importantly, while growth for each transposon mutant takes place in isolation, gDNA is isolated from the pooled population, enabling screening of all mutants simultaneously. b gDNA is then amplified with DNA polymerase phi29, digested with MmeI, an adapter is ligated, a ~180 bp fragment is produced which contains ~16 nucleotides of bacterial gDNA, defining the transposon-insertion location, followed by Illumina sequencing. Reads are demultiplexed based on the barcode in the adapter and a potential second barcode in primer 1, mapped to the genome, and fitness is calculated for each defined region.

    Article Snippet: Beads were then dried for 3 min at room temperature, and DNA was eluted off the beads with 12.7 μl of dH2 O. (3) In all, 11.49 μl of phi29 amplified DNA was then added to a MmeI digestion mix (two units NEB MmeI enzyme, 50 μM SAM, 1× CutSmart Buffer) in a total volume of 20 μl, and incubated for 2.5 h at 37 °C followed by 20 min at 65 °C. (4) In all, 1 μl of alkaline phosphatase (NEB - M0290S Calf Intestinal, CIP) was added to the sample and incubated for 1 h at 37 °C. (5) In total, 10 μl of magnetic beads plus 20 μl PEG solution per sample were used to wash the sample followed by elution in 14.3 μl of dH2 O. (6) T4 DNA ligase (NEB M0202L) was used to ligate DNA adapter barcodes by adding 13.12 μl DNA to 1 μl of 1:5 diluted adapter, 1× T4 DNA Ligase Reaction Buffer, and 400 units T4 DNA ligase, followed by incubation at 16 °C for 16 h, 65 °C for 10 min, and held at 10 °C. (7) In all, 10 μl magnetic beads plus 20 μl PEG solution were used to wash the sample followed by elution in 36 μl of dH2 O. (8) Adapter ligated DNA was then PCR amplified using Q5 high-fidelity DNA polymerase (NEB – M0491L) by adding 34 μl of DNA to 1X Q5 reaction buffer, 10 mM dNTPs, 0.45 μM of each primer (P1-M6-GAT-MmeI; P2-ADPT-Tnseq-primer; Supplementary Data ), one unit Q5 DNA polymerase, and incubated at 98 °C for 30 s, and 18–22 cycles of 98 °C for 10 s, 62 °C for 30 s, 72 °C for 15 s, followed by 72 °C for 2 min, and a 10 °C hold. (9) PCR products were gel purified and sequenced on an Illumina NextSeq 500 according to the manufacturer's protocol.

    Techniques: Isolation, Mutagenesis, Amplification, Produced, Sequencing

    Unbiased whole-genome amplification of low-quantity genomic DNA. a , b gDNA was prepared by two different methods for transposon sequencing. For the WGA sample, 10 ng of gDNA was amplified first with DNA polymerase phi29 before MmeI digestion and adapter ligation. For the standard sample, 1 μg of gDNA was digested with MmeI, followed by adapter ligation. There is a strong correlation between fitness values obtained from WGA preparation compared with standard Tn-Seq library preparation a , and WGA preparation is highly reproducible b .

    Journal: Nature Communications

    Article Title: Droplet Tn-Seq combines microfluidics with Tn-Seq for identifying complex single-cell phenotypes

    doi: 10.1038/s41467-019-13719-9

    Figure Lengend Snippet: Unbiased whole-genome amplification of low-quantity genomic DNA. a , b gDNA was prepared by two different methods for transposon sequencing. For the WGA sample, 10 ng of gDNA was amplified first with DNA polymerase phi29 before MmeI digestion and adapter ligation. For the standard sample, 1 μg of gDNA was digested with MmeI, followed by adapter ligation. There is a strong correlation between fitness values obtained from WGA preparation compared with standard Tn-Seq library preparation a , and WGA preparation is highly reproducible b .

    Article Snippet: Beads were then dried for 3 min at room temperature, and DNA was eluted off the beads with 12.7 μl of dH2 O. (3) In all, 11.49 μl of phi29 amplified DNA was then added to a MmeI digestion mix (two units NEB MmeI enzyme, 50 μM SAM, 1× CutSmart Buffer) in a total volume of 20 μl, and incubated for 2.5 h at 37 °C followed by 20 min at 65 °C. (4) In all, 1 μl of alkaline phosphatase (NEB - M0290S Calf Intestinal, CIP) was added to the sample and incubated for 1 h at 37 °C. (5) In total, 10 μl of magnetic beads plus 20 μl PEG solution per sample were used to wash the sample followed by elution in 14.3 μl of dH2 O. (6) T4 DNA ligase (NEB M0202L) was used to ligate DNA adapter barcodes by adding 13.12 μl DNA to 1 μl of 1:5 diluted adapter, 1× T4 DNA Ligase Reaction Buffer, and 400 units T4 DNA ligase, followed by incubation at 16 °C for 16 h, 65 °C for 10 min, and held at 10 °C. (7) In all, 10 μl magnetic beads plus 20 μl PEG solution were used to wash the sample followed by elution in 36 μl of dH2 O. (8) Adapter ligated DNA was then PCR amplified using Q5 high-fidelity DNA polymerase (NEB – M0491L) by adding 34 μl of DNA to 1X Q5 reaction buffer, 10 mM dNTPs, 0.45 μM of each primer (P1-M6-GAT-MmeI; P2-ADPT-Tnseq-primer; Supplementary Data ), one unit Q5 DNA polymerase, and incubated at 98 °C for 30 s, and 18–22 cycles of 98 °C for 10 s, 62 °C for 30 s, 72 °C for 15 s, followed by 72 °C for 2 min, and a 10 °C hold. (9) PCR products were gel purified and sequenced on an Illumina NextSeq 500 according to the manufacturer's protocol.

    Techniques: Whole Genome Amplification, Sequencing, Amplification, Ligation

    Analysis of pUC19 DNA following treatment with clb − or clb + E. coli and linearization with the restriction enzyme EcoRI. The cross-linked linearized pUC19 DNA isolated from a co-culture with clb + BW25113 E. coli was used a positive control. A. Analysis of DNA by native gel electrophoresis. B. Analysis of DNA by denaturing gel electrophoresis. For both A and B: DNA ladder (Lane #1); circular pUC19 DNA standard (Lane #2); linearized pUC19 DNA standard (Lane # 3); linearized pUC19 DNA co-cultured with clb + BW25113 E. coli (Lane #4); circular pUC19 DNA isolated from co-culture with clb − BW25113 E. coli (Lane #5), reacted with buffer (Lane #6), reacted with EcoRI restriction enzyme (Lane #7); circular pUC19 DNA isolated from co-culture with clb + BW25113 E. coli (Lane #8), reacted with buffer (Lane #9), reacted with EcoRI restriction enzyme (Lane #10). Conditions (Lane #4): linearized pUC19 DNA, clb + BW25113 E. coli , M9-CA media, 4 h at 37 °C. Conditions (Lane #5–#7): circular pUC19 DNA isolated from co-culture with clb − BW25113 E. coli in M9-CA media for 4 h at 37 °C (Lane #5); the DNA (15.4 µM base pair) was reacted with CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #6); the DNA (15.4 µM base pair) was reacted with 20 units of EcoRI-HF restriction enzyme in CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #7). Conditions (Lane #8–#10): circular pUC19 DNA isolated from co-culture with BW25113 clb + E. coli. in in M9-CA media for 4 h at 37 °C (Lane # 8); the DNA (15.4 µM base pair) was reacted with CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #9); the DNA (15.4 µM base pair) was reacted with 20 units of EcoRI-HF restriction enzyme in CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #10). The DNA was isolated and analyzed by native ( Fig. 5A ) or 0.4% NaOH denaturing ( Fig. 5B ) agarose gel electrophoresis (90 V, 1.5 h).

    Journal: bioRxiv

    Article Title: Depurination of colibactin-derived interstrand cross-links

    doi: 10.1101/869313

    Figure Lengend Snippet: Analysis of pUC19 DNA following treatment with clb − or clb + E. coli and linearization with the restriction enzyme EcoRI. The cross-linked linearized pUC19 DNA isolated from a co-culture with clb + BW25113 E. coli was used a positive control. A. Analysis of DNA by native gel electrophoresis. B. Analysis of DNA by denaturing gel electrophoresis. For both A and B: DNA ladder (Lane #1); circular pUC19 DNA standard (Lane #2); linearized pUC19 DNA standard (Lane # 3); linearized pUC19 DNA co-cultured with clb + BW25113 E. coli (Lane #4); circular pUC19 DNA isolated from co-culture with clb − BW25113 E. coli (Lane #5), reacted with buffer (Lane #6), reacted with EcoRI restriction enzyme (Lane #7); circular pUC19 DNA isolated from co-culture with clb + BW25113 E. coli (Lane #8), reacted with buffer (Lane #9), reacted with EcoRI restriction enzyme (Lane #10). Conditions (Lane #4): linearized pUC19 DNA, clb + BW25113 E. coli , M9-CA media, 4 h at 37 °C. Conditions (Lane #5–#7): circular pUC19 DNA isolated from co-culture with clb − BW25113 E. coli in M9-CA media for 4 h at 37 °C (Lane #5); the DNA (15.4 µM base pair) was reacted with CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #6); the DNA (15.4 µM base pair) was reacted with 20 units of EcoRI-HF restriction enzyme in CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #7). Conditions (Lane #8–#10): circular pUC19 DNA isolated from co-culture with BW25113 clb + E. coli. in in M9-CA media for 4 h at 37 °C (Lane # 8); the DNA (15.4 µM base pair) was reacted with CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #9); the DNA (15.4 µM base pair) was reacted with 20 units of EcoRI-HF restriction enzyme in CutSmart Buffer® (New England Biolabs®), pH 7.9, at 37 °C for 30 minutes (Lane #10). The DNA was isolated and analyzed by native ( Fig. 5A ) or 0.4% NaOH denaturing ( Fig. 5B ) agarose gel electrophoresis (90 V, 1.5 h).

    Article Snippet: To set up the linearization reactions, 20 units of EcoRI-HF® (New England Biolabs®) was mixed with 500 ng of isolated DNA (40 units/µg DNA) in CutSmart® buffer (New England Biolabs®), pH 7.9, in a total volume of 50 µL for 30 min at 37 °C.

    Techniques: Isolation, Co-Culture Assay, Positive Control, Nucleic Acid Electrophoresis, Cell Culture, Agarose Gel Electrophoresis