Evidence for a Watson-Crick hydrogen bonding requirement in DNA synthesis by human DNA polymerase kappa.
Evidence for a Watson-Crick hydrogen bonding requirement in DNA synthesis by human DNA polymerase kappa.
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人类 DNA 聚合酶 kappa 合成 DNA 时需要 Watson-Crick 氢键的证据。
DOI:
10.1128/mcb.25.16.7137-7143.2005
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发表时间:
2005
期刊:
影响因子:
--
通讯作者:
Prakash,Satya
中科院分区:
文献类型:
--
作者:
Wolfle,WilliamT;Washington,MTodd;Kool,EricT;Spratt,ThomasE;Helquist,SandraA;Prakash,Louise;Prakash,Satya
The efficiency and fidelity of nucleotide incorporation by high-fidelity replicative DNA polymerases (Pols) are governed by the geometric constraints imposed upon the nascent base pair by the active site. Consequently, these polymerases can efficiently and accurately replicate through the template bases which are isosteric to natural DNA bases but which lack the ability to engage in Watson-Crick (W-C) hydrogen bonding. DNA synthesis by Polη, a low-fidelity polymerase able to replicate through DNA lesions, however, is inhibited in the presence of such an analog, suggesting a dependence of this polymerase upon W-C hydrogen bonding. Here we examine whether human Polκ, which differs from Polη in having a higher fidelity and which, unlike Polη, is inhibited at inserting nucleotides opposite DNA lesions, shows less of a dependence upon W-C hydrogen bonding than does Polη. We find that an isosteric thymidine analog is replicated with low efficiency by Polκ, whereas a nucleobase analog lacking minor-groove H bonding potential is replicated with high efficiency. These observations suggest that both Polη and Polκ rely on W-C hydrogen bonding for localizing the nascent base pair in the active site for the polymerization reaction to occur, thus overcoming these enzymes' low geometric selectivity.
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DOI:
10.1152/ajpcell.1984.247.3.c234
发表时间:
1984
期刊:
The American journal of physiology
影响因子:
--
作者:
Sato,K;Sato,F
通讯作者:
Sato,F
影响因子:
--
作者:
M. Kino;A. Tokushige;H. Tamura;L. Hopp;B. Searle;F. Khalil;A. Aviv
通讯作者:
A. Aviv
DOI:
10.1172/jci111419
发表时间:
1984
期刊:
The Journal of clinical investigation
影响因子:
--
作者:
Garcia-Perez,A;Smith,WL
通讯作者:
Smith,WL
DOI:
--
发表时间:
1979
期刊:
Prostaglandins
影响因子:
--
作者:
O. V. Miller;J. W. Aiken;D. P. Hemker;R. Shebuski;R. Gorman
通讯作者:
R. Gorman
DOI:
10.1152/ajpcell.1983.244.3.c211
发表时间:
1983
期刊:
The American journal of physiology
影响因子:
--
作者:
Garcia-Perez,A;Smith,WL
通讯作者:
Smith,WL