MenD from Bacillus subtilis: A Potent Catalyst for the Enantiocomplementary Asymmetric Synthesis of Functionalized α‐Hydroxy Ketones
MenD from Bacillus subtilis: A Potent Catalyst for the Enantiocomplementary Asymmetric Synthesis of Functionalized α‐Hydroxy Ketones
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来自枯草芽孢杆菌的 MenD:功能化α羟基酮对映互补不对称合成的有效催化剂
DOI:
10.1002/cctc.201300690
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发表时间:
2014
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;Jansen S;Vogel C;Pleiss J;Müller M;Rother D;Pohl M
The thiamine diphosphate‐dependent enzyme 2‐succinyl‐5‐enolpyruvyl‐6‐hydroxy‐3‐cyclohexene‐1‐carboxylate synthase (MenD) catalyzes a Stetter‐like 1,4‐addition of α‐ketoglutarate to isochorismate in the biosynthesis of menaquinone (vitamin K). Here, we describe the carboligation potential of MenD fromBacillus subtilis(BsMenD) for the nonphysiological 1,2‐addition of decarboxylated α‐ketoglutarate (succinylsemialdehyde) and various benzaldehyde derivatives. Furthermore, we engineerBsMenD variants for the enantiocomplementary asymmetric synthesis of functionalized α‐hydroxy ketones. Wild typeBsMenD shows an excellent chemo‐ as well as high (R)‐selectivity for the carboligation of α‐ketoglutarate as the donor, and different benzaldehyde derivatives as acceptor yielding (R)‐α‐hydroxy ketones with up to >99 %ee. By engineering (S)‐selectiveBsMenD variants, based on the recently developedS‐pocket concept, we provide access to most of the corresponding (S)‐α‐hydroxy ketones with up to 98 %ee. In particular, benzaldehyde andmeta‐substituted derivatives were converted with high enantioselectivities (eeof 91–98 % (S)). The significantly higher (S)‐selectivity ofBsMenD variants than recently published MenD variants fromEscherichia coli, could be attributed to a second‐shell residue next to theS‐pocket. A glycine residue, adjacent to the majorS‐pocket residues I476 and F477 (standard numbering), is assumed to result in higher structural flexibility in theS‐pocket region ofBsMenD, which in turn could result in improved stabilization of the antiparallel orientation of the acceptor.
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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:
--
作者:
Anja Kurutsch;M. Richter;V. Brecht;G. Sprenger;Michael Müller
通讯作者:
Michael Müller
DOI:
10.1039/b100341k
发表时间:
2001-01-01
期刊:
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1
影响因子:
--
作者:
Demir, AS;Pohl, M;Müller, M
通讯作者:
Müller, M