Joyce Catherine M
Department of Molecular Biophysics and Biochemistry, Yale University, 266 Whitney Avenue, P.O. Box 208114, New Haven, CT 06520-8114, USA.
Biochim Biophys Acta. 2010 May;1804(5):1032-40. doi: 10.1016/j.bbapap.2009.07.021. Epub 2009 Aug 7.
A minimal reaction pathway for DNA polymerases was established over 20years ago using chemical-quench methods. Since that time there has been considerable interest in noncovalent steps in the reaction pathway, conformational changes involving the polymerase or its DNA substrate that may play a role in substrate specificity. Fluorescence-based assays have been devised in order to study these conformational transitions and the results obtained have added new detail to the reaction pathway.
20多年前,利用化学淬灭方法建立了DNA聚合酶的最小反应途径。从那时起,人们对反应途径中的非共价步骤、涉及聚合酶或其DNA底物的构象变化产生了浓厚兴趣,这些变化可能在底物特异性中发挥作用。为了研究这些构象转变,人们设计了基于荧光的检测方法,所获得的结果为反应途径增添了新的细节。