Hinton D M, Gumport R I
Nucleic Acids Res. 1979 Sep 25;7(2):453-64. doi: 10.1093/nar/7.2.453.
T4 RNA ligase catalyzes the addition of a single deoxyribonucleoside 3',5'-bisphosphate to the 3'-hydroxyl of oligodeoxyribonucleotides (Hinton et al. (1978) Biochemistry 17, 5091). We have determined improved conditions for this reaction which give yields equal to or greater than 85% when any of five common deoxyribonucleoside bisphosphate (pdAp, pdCp, pdGp, pdTp, or pdUp) are added to dA(PDA)4. A low ATP concentration, which is constantly maintained by a regeneration system composed of phosphocreatine, creatine kinase, and myokinase, contributes to the attainment of high yields. The addition of RNase A and spermine also enhances the rates and yields of the reactions. These conditions facilitate the use of RNA ligase as a reagent for the stepwise synthesis of DNA of defined sequence.
T4 RNA连接酶催化将单个脱氧核糖核苷3',5'-二磷酸添加到寡脱氧核糖核苷酸的3'-羟基上(辛顿等人,(1978年)《生物化学》17卷,5091页)。我们已经确定了该反应的改进条件,当将五种常见的脱氧核糖核苷二磷酸(pdAp、pdCp、pdGp、pdTp或pdUp)中的任何一种添加到dA(PDA)4中时,产率等于或大于85%。由磷酸肌酸、肌酸激酶和肌激酶组成的再生系统持续维持的低ATP浓度有助于实现高产率。添加核糖核酸酶A和精胺也能提高反应速率和产率。这些条件便于将RNA连接酶用作逐步合成特定序列DNA的试剂。