Binding of β-lactam antibiotics to a bioinspired dizinc complex reminiscent of the active site of metallo-β-lactamases.
Binding of β-lactam antibiotics to a bioinspired dizinc complex reminiscent of the active site of metallo-β-lactamases.
复制标题
β-内酰胺抗生素与生物启发的二锌复合物的结合让人想起金属-β-内酰胺酶的活性位点
DOI:
10.1021/ic202425m
复制
发表时间:
2012
影响因子:
4.6
通讯作者:
F. Meyer
中科院分区:
文献类型:
--
作者:
S. Wöckel;J. Galezowska;S. Dechert;F. Meyer
Metallo-β-lactamases (mβls) cause bacterial resistance toward a broad spectrum of β-lactam antibiotics by catalyzing the hydrolytic cleavage of the four-membered β-lactam ring, thus inactivating the drug. Minutiae of the mechanism of these enzymes are still not well understood, and reports about binding studies of the substrates to the enzymes as well as to synthetic model systems are rare. Here we report a new pyrazolate-based bioinspired dizinc complex (1) reminiscent of the active site of binuclear mβls. Since1does not mediate hydrolytic degradation of β-lactams, the binding of a series of common β-lactam antibiotics (benzylpenicillin, cephalotin, 6-aminopenicillanic acid, ampicillin) as well as the inhibitor sulbactam and the simplest β-lactam, 2-azetidinone, to the dizinc core of1could now be studied in detail by NMR and IR spectroscopy as well as mass spectrometry. X-ray crystallographic information was obtained for1and its complexes with 2-azetidinone (2) and sulbactam (3); the latter represents the first structurally characterized dizinc complex with a bound β-lactam drug. While 2-azetidinone was found deprotonated and bridging in the clamp of the two zinc ions in2, in3and all other cases the substrates preferentially bind via their carboxylate group within the bimetallic pocket. The relevance of this binding mode for mβls and consequences for the design of functional model systems are discussed.
登录
查看更多内容
DOI:
--
发表时间:
1987
期刊:
影响因子:
--
作者:
Q. Yang;P. Seiler;J. Dunitz
通讯作者:
J. Dunitz
影响因子:
5.6
作者:
O. Jacquin;Dorothée Balbeur;C. Damblon;P. Marchot;E. De Pauw;G. Roberts;J. Frère;A. Matagne
通讯作者:
A. Matagne
影响因子:
4.9
作者:
F. Meyer;P. Rutsch
通讯作者:
P. Rutsch
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
W. Henderson;A. Oliver;C. Rickard
通讯作者:
C. Rickard
DOI:
--
发表时间:
1984
期刊:
影响因子:
--
作者:
M. Asso;R. Panossian;M. Guiliano
通讯作者:
M. Guiliano