Substrate-bound structures of a ketoreductase from amphotericin modular polyketide synthase.
Substrate-bound structures of a ketoreductase from amphotericin modular polyketide synthase.
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两性霉素模块化聚酮合酶酮还原酶的底物结合结构
DOI:
10.1016/j.jsb.2018.04.001
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发表时间:
2018-08
影响因子:
3
通讯作者:
Zheng J
中科院分区:
文献类型:
--
作者:
Liu C;Yuan M;Xu X;Wang L;Keatinge-Clay AT;Deng Z;Lin S;Zheng J
Ketoreductase (KR) domains of modular polyketide synthases (PKSs) control the stereochemistry of C2 methyl and C3 hydroxyl substituents of polyketide intermediates. To understand the molecular basis of stereocontrol exerted by KRs, the crystal structure of a KR from the second module of the amphotericin PKS (AmpKR2) complexed with NADP+ and 2-methyl-3-oxopentanoyl-pantetheine was solved. This first ternary structure provides direct evidence to the hypothesis that a substrate enters into the active site of an A-type KR from the side opposite the coenzyme to generate an L-hydroxyl substituent. A comparison with the ternary complex of a G355T/Q364H mutant sheds light on the structural basis for stereospecificity toward the substrate C2 methyl substituent. Functional assays suggest the pantetheine handle shows obvious influence on the catalytic efficiency and the stereochemical outcome. Together, these findings extend our current understanding of the stereo-chemical control of PKS KR domains.
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影响因子:
2.9
作者:
Xie X;Garg A;Keatinge-Clay AT;Khosla C;Cane DE
通讯作者:
Cane DE
DOI:
10.1039/c5cc07315d
发表时间:
2016-01-14
期刊:
Chemical communications (Cambridge, England)
影响因子:
--
作者:
Bailey CB;Pasman ME;Keatinge-Clay AT
通讯作者:
Keatinge-Clay AT
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:
3.2
作者:
Caffrey, P
通讯作者:
Caffrey, P
影响因子:
2.9
作者:
Weissman, KJ;Timoney, M;Leadlay, PF
通讯作者:
Leadlay, PF