Journal: Nucleic Acids Research
Article Title: T5 exonuclease-dependent assembly offers a low-cost method for efficient cloning and site-directed mutagenesis
Figure Lengend Snippet: Comparison of different assembly methods. ( A ) TEDA was compared with In-fusion and SLIC for the assembly of two fragments. Middle- lacZ and pBBR1MCS5::lacZ-truncated with 15-bp or 20-bp overlaps were used. 1:1, the same molar ratio of the insert to vector was used for DNA assembly; 1:2, double molar amount of the insert to vector was used for DNA assembly. ( B ) TEDA was compared with Gibson and non-optimized TEDA methods. The Pkat-eGFP and SmaI-pSK was used for cloning. TEDA(0.04U)−30°C, 0.04 U T5 exonuclease at 30°C for 40 min; TEDA(0.08 U)−30°C, 0.08 U T5 exonuclease at 30°C for 40 min; TEDA(0.04 U)−50°C, 0.04 U T5 exonuclease at 50°C for 40 min; Gibson, 0.08 U T5 exonuclease with Phusion and Taq DNA ligase at 50°C for 60 min. Neg, DNA fragments were transformed without TEDA treatment. ( C ) TEDA was compared with In-fusion for 4 fragments assembly. The 5Ptac-phbCAB operon was separated into three fragments (Figure 2A ), and they were assembled with linearized pBBR1MCS-2 to generate pBBR1MCS2::5Ptac-phbCAB. The data are averages of three parallel experiments with STDEV.
Article Snippet: 5X TEDA stock solution One milliliter of 5X TEDA solution contained 0.5 M Tris–HCl pH 7.5, 50 mM MgCl2 , 50 mM dithiothreitol, 0.25 g of PEG 8000, and 1 μl of 10 U/μl T5 exonuclease (New England Biolab, Beijing).
Techniques: Plasmid Preparation, Clone Assay, Transformation Assay