Molecular Basis of Substrate Recognition and Product Release by the Klebsiella pneumoniae Carbapenemase (KPC-2).

Molecular Basis of Substrate Recognition and Product Release by the Klebsiella pneumoniae Carbapenemase (KPC-2).
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DOI:
10.1021/acs.jmedchem.7b00158
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发表时间:
2017-04-27
影响因子:
7.3
通讯作者:
Chen Y
Chen Y
中科院分区:
医学1区
文献类型:
--
作者:
Pemberton OA;Zhang X;Chen Y

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碳青霉烯类耐药肠杆菌科(CRE)由于产生KPC-2 A类β-内酰胺酶而对大多数β-内酰胺抗生素具有耐药性。本文介绍了KPC-2与β-内酰胺类抗生素的第一个产物复合物晶体结构,其中含有水解的头孢噻肟和法罗培南。他们提供了KPC-2的底物识别及其独特的头孢菌素酶/碳青霉烯酶活性的实验见解。这些结构也代表了野生型丝氨酸β-内酰胺酶的第一个产物复合物,阐明了这些酶的产物释放机制。
Carbapenem-resistant Enterobacteriaceae (CRE) are resistant to most β-lactam antibiotics due to production of the KPC-2 class A β-lactamase. Here we present the first product complex crystal structures of KPC-2 with β-lactam antibiotics, containing hydrolyzed cefotaxime and faropenem. They provide experimental insights into substrate recognition by KPC-2 and its unique cephalosporinase/carbapenemase activity. These structures also represent the first product complexes for a wild type serine β-lactamase, elucidating the product release mechanism of these enzymes in general.
X射线晶体学揭示了配体诱导的质子转移和低垒氢键。
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