Tailoring the S‐Selectivity of 2‐Succinyl‐5‐enolpyruvyl‐6‐hydroxy‐3‐cyclohexene‐1‐carboxylate Synthase (MenD) from Escherichia coli
Tailoring the S‐Selectivity of 2‐Succinyl‐5‐enolpyruvyl‐6‐hydroxy‐3‐cyclohexene‐1‐carboxylate Synthase (MenD) from Escherichia coli
复制标题
定制大肠杆菌 2â琥珀酰â5â烯醇丙酮酰â6â羟基â3â环己烯â1â羧酸合酶 (MenD) 的 Sâ选择性
DOI:
10.1002/cctc.201300318
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发表时间:
2013
期刊:
影响因子:
4.5
通讯作者:
Pohl M
中科院分区:
文献类型:
--
作者:
Westphal R;Hahn D;Mackfeld U;Waltzer S;Beigi M;Widmann M;Vogel C;Pleiss J;Müller M;Pohl M
The thiamine diphosphate (ThDP)‐dependent enzyme 2‐succinyl‐5‐enolpyruvyl‐6‐hydroxy‐3‐cyclohexene‐1‐carboxylate synthase fromEscherichia coli(EcMenD, E.C. 2.2.1.9) catalyzes the carboligation of α‐ketoglutarate (α‐KG) and various benzaldehyde derivatives with excellent chemo‐ as well as highR‐selectivity (enantiomeric excess (ee) >93 %) to yield chiral α‐hydroxy ketones. Based on the recently developedS‐pocket concept, we engineeredS‐selectiveEcMenD variants by optimizing the steric properties and stabilization of the acceptor substrate in theS‐pocket. Moreover, the moderateS‐selectivity of theEcMenD variant I474A/F475G described recently for the carboligation of α‐KG and benzaldehyde (ee=75 %) could be improved by selective destabilization of theR‐pathway, which resulted in the variant I474A/F475G/R395Y (ee=85 %S). Subsequent investigation of the acceptor substrate range of this new variant revealed highS‐selectivity especially withmeta‐substituted benzaldehydes, which gave access to 5‐hydroxy‐4‐oxo‐5‐arylpentanoates with excellent enantioselectivities of up to 99 %ee S. Thus, opening theS‐pocket and simultaneous destabilization of theR‐pathway provides a potential general new strategy to enhance theS‐selectivity of ThDP‐dependent enzymes.
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影响因子:
--
作者:
Widmann M;Radloff R;Pleiss J
通讯作者:
Pleiss J
影响因子:
5.2
作者:
Beigi, Maryam;Waltzer, Simon;Mueller, Michael
通讯作者:
Mueller, Michael
影响因子:
3.8
作者:
R. Wilcocks;O. Ward
通讯作者:
O. Ward
影响因子:
4.3
作者:
M. Breuer;M. Pohl;B. Hauer;B. Lingen
通讯作者:
B. Lingen
影响因子:
3.4
作者:
PHILLIPS, RS
通讯作者:
PHILLIPS, RS