The molecular basis for the broad substrate specificity of human sulfotransferase 1A1.
The molecular basis for the broad substrate specificity of human sulfotransferase 1A1.
复制标题
人硫代转移酶1a1的广泛底物特异性的分子基础。
DOI:
10.1371/journal.pone.0026794
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Aharoni A
中科院分区:
文献类型:
--
作者:
Berger I;Guttman C;Amar D;Zarivach R;Aharoni A
Cytosolic sulfotransferases (SULTs) are mammalian enzymes that detoxify a wide variety of chemicals through the addition of a sulfate group. Despite extensive research, the molecular basis for the broad specificity of SULTs is still not understood. Here, structural, protein engineering and kinetic approaches were employed to obtain deep understanding of the molecular basis for the broad specificity, catalytic activity and substrate inhibition of SULT1A1. We have determined five new structures of SULT1A1 in complex with different acceptors, and utilized a directed evolution approach to generate SULT1A1 mutants with enhanced thermostability and increased catalytic activity. We found that active site plasticity enables binding of different acceptors and identified dramatic structural changes in the SULT1A1 active site leading to the binding of a second acceptor molecule in a conserved yet non-productive manner. Our combined approach highlights the dominant role of SULT1A1 structural flexibility in controlling the specificity and activity of this enzyme.
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DOI:
10.1107/s0907444905036693
发表时间:
2006-01-01
影响因子:
2.2
作者:
Evans, P
通讯作者:
Evans, P
影响因子:
5.6
作者:
Bershtein, Shimon;Goldin, Korina;Tawfik, Dan S.
通讯作者:
Tawfik, Dan S.
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
影响因子:
5.6
作者:
Bidwell, LM;McManus, ME;Martin, JL
通讯作者:
Martin, JL
影响因子:
4.8
作者:
Dajani, R;Cleasby, A;Coughtrie, MWH
通讯作者:
Coughtrie, MWH