Studies on the Reactions of Biapenem with VIM Metallo β-Lactamases and the Serine β-Lactamase KPC-2.
Studies on the Reactions of Biapenem with VIM Metallo β-Lactamases and the Serine β-Lactamase KPC-2.
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DOI:
10.3390/antibiotics11030396
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发表时间:
2022-03-16
期刊:
影响因子:
--
通讯作者:
Schofield CJ
中科院分区:
文献类型:
--
作者:
Lucic A;Malla TR;Calvopiña K;Tooke CL;Brem J;McDonough MA;Spencer J;Schofield CJ
Carbapenems are important antibacterials and are both substrates and inhibitors of some β-lactamases. We report studies on the reaction of the unusual carbapenem biapenem, with the subclass B1 metallo-β-lactamases VIM-1 and VIM-2 and the class A serine-β-lactamase KPC-2. X-ray diffraction studies with VIM-2 crystals treated with biapenem reveal the opening of the β-lactam ring to form a mixture of the (2S)-imine and enamine complexed at the active site. NMR studies on the reactions of biapenem with VIM-1, VIM-2, and KPC-2 reveal the formation of hydrolysed enamine and (2R)- and (2S)-imine products. The combined results support the proposal that SBL/MBL-mediated carbapenem hydrolysis results in a mixture of tautomerizing enamine and (2R)- and (2S)-imine products, with the thermodynamically favoured (2S)-imine being the major observed species over a relatively long-time scale. The results suggest that prolonging the lifetimes of β-lactamase carbapenem complexes by optimising tautomerisation of the nascently formed enamine to the (2R)-imine and likely more stable (2S)-imine tautomer is of interest in developing improved carbapenems.
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影响因子:
4.6
作者:
Galdadas I;Lovera S;Pérez-Hernández G;Barnes MD;Healy J;Afsharikho H;Woodford N;Bonomo RA;Gervasio FL;Haider S
通讯作者:
Haider S
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
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通讯作者:
Cowtan, K
影响因子:
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Nicoletti, G
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3.6
作者:
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通讯作者:
Nagao, Y
影响因子:
4.9
作者:
Makena A;Düzgün AÖ;Brem J;McDonough MA;Rydzik AM;Abboud MI;Saral A;Çiçek AÇ;Sandalli C;Schofield CJ
通讯作者:
Schofield CJ