An evolved aminoacyl-tRNA synthetase with atypical polysubstrate specificity.
An evolved aminoacyl-tRNA synthetase with atypical polysubstrate specificity.
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DOI:
10.1021/bi101929e
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发表时间:
2011-03-22
期刊:
影响因子:
2.9
通讯作者:
Schultz PG
中科院分区:
文献类型:
--
作者:
Young DD;Young TS;Jahnz M;Ahmad I;Spraggon G;Schultz PG
We have employed a rapid fluorescence-based screen to assess the polyspecificity of several aaRSs against an array of unnatural amino acids. We discovered that a p-cyanophenylalanine specific aminoacyl-tRNA synthetase (pCNF-RS) has high substrate permissivity for unnatural amino acids, while maintaining its ability to discriminate against the canonical twenty amino acids. This orthogonal pCNF-RS, together with its cognate amber nonsense suppressor tRNA is able to selectively incorporate 18 unnatural amino acids into proteins, including trifluoroketone, alkynyl, and hydrazino substituted amino acids. In an attempt to better understand this polyspecificity, the x-ray crystal structure of the aaRS/p-cyanophenylalanine complex was determined. A comparison of this structure with those of other mutant aaRSs showed that both binding site size and other more subtle features control substrate polyspecificitiy.
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影响因子:
2.9
作者:
Miyake-Stoner, Shigeki J.;Refakis, Christian A.;Mehl, Ryan A.
通讯作者:
Mehl, Ryan A.
影响因子:
15
作者:
Lee HS;Spraggon G;Schultz PG;Wang F
通讯作者:
Wang F
影响因子:
--
作者:
Wang, L;Schultz, PG
通讯作者:
Schultz, PG
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
DOI:
10.1038/nsb934
发表时间:
2003-06-01
期刊:
NATURE STRUCTURAL BIOLOGY
影响因子:
--
作者:
Kobayashi, T;Nureki, O;Yokoyama, S
通讯作者:
Yokoyama, S