1.Construction of a New T-Vector: Nickase (Nt.BspQI)-Generated T-Vector Bearing a Reddish-Orange Indicator Gene.
Ji Young CHOI ; Chulman JO ; Sangmee Ahn JO
Tissue Engineering and Regenerative Medicine 2016;13(1):66-69
T-vectors are widely used for cloning the polymerase chain reaction (PCR) products. However, the low conversion efficiency of a plasmid into the linear T-vector usually results in non-recombinants. Here, we designed a new plasmid pNBQ-T to easily select the recombinant colonies harboring PCR products. pNBQ-T plasmid, which contains a DsRed indicator gene between two Nt.BspQI restriction cassettes, each of which contains palindromic sequences susceptible to Nt.BspQI nickase (5′-GCTCTTCT^GAAGAGC-3′) at each end. Thus, this plasmid can be easily converted into T-vectors by a nickase (quadruple nicking), which results in two double strand breaks with 3′-thymidine overhangs. DsRed indicator gene, which is inserted between the restriction sites, helps identifying the PCR recombinants. Using this pNBQ-T plasmid the insertion efficiency of a PCR product was examined. We successfully identified white colony of the recombinants with the inserted myostatin promoter gene: the cloning efficiency was 93%. Therefore, this simple method utilizing pNBQ-T plasmid will serve as a useful and efficient technique for preparation of home-made T-vectors.
Clone Cells
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Cloning, Organism
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Deoxyribonuclease I*
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Methods
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Myostatin
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Plasmids
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Polymerase Chain Reaction