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
复制
发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Aharoni A
Aharoni A
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Berger I;Guttman C;Amar D;Zarivach R;Aharoni A

文献摘要

参考文献

被引文献

相似文献

细胞溶质磺基转移酶(SULT)是哺乳动物的酶,通过添加硫酸基团来解毒各种化学品。尽管进行了广泛的研究,SULT广泛特异性的分子基础仍然不清楚。在这里,采用结构,蛋白质工程和动力学方法,以深入了解SULT1A1的广泛特异性,催化活性和底物抑制的分子基础。我们已经确定了五个新的结构的SULT1A1在复杂的不同受体,并利用定向进化的方法来产生SULT1A1突变体具有增强的热稳定性和催化活性增加。我们发现,活性位点的可塑性,使不同的受体的结合,并确定了显着的结构变化的SULT1A1活性位点,导致第二受体分子的结合,在一个保守的,但非生产性的方式。我们的组合方法突出了SULT1A1结构灵活性在控制这种酶的特异性和活性方面的主导作用。
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.
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
DOI: 10.1016/j.jmb.2008.04.024
发表时间: 2008-06-20
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
DOI: 10.1006/jmbi.1999.3153
发表时间: 1999-10-29
影响因子: 5.6
作者:
Bidwell, LM;McManus, ME;Martin, JL
通讯作者: Martin, JL