4FSB

Crystal structure of the metallo-beta-lactamase VIM-31 in its oxidized form at 1.88 A

4FSB の概要

• エントリーDOI: 10.2210/pdb4fsb/pdb
• 関連するPDBエントリー: 4FR7
• 分子名称: Metallo-beta-lactamase VIM-31, ZINC ION, CHLORIDE ION, ... (4 entities in total)
• 機能のキーワード: metallo-beta-lactamase superfamily, beta-lactam hydrolyzing enzyme, zinc binding, hydrolase
• 由来する生物種: Enterobacter cloacae
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 50789.37

構造登録者

Herzog, K.,Hoffmann, K.M. (登録日: 2012-06-27, 公開日: 2013-06-26, 最終更新日: 2023-12-06)

主引用文献

Kupper, M.B.,Herzog, K.,Bennink, S.,Schlomer, P.,Bogaerts, P.,Glupczynski, Y.,Fischer, R.,Bebrone, C.,Hoffmann, K.M.
The three-dimensional structure of VIM-31 - a metallo-beta-lactamase from Enterobacter cloacae in its native and oxidized form.
Febs J., 282:2352-2360, 2015

PubMed Abstract: The metallo-β-lactamase VIM-31 differs from VIM-2 by only two Tyr224His and His252Arg substitutions. Located close to the active site, the Tyr224His substitution is also present in VIM-1, VIM-4, VIM-7 and VIM-12. The VIM-31 variant was reported in 2012 from Enterobacter cloacae and kinetically characterized. It exhibits globally lower catalytic efficiencies than VIM-2. In the present study, we report the three-dimensional structures of VIM-31 in its native (reduced) and oxidized forms. The so-called 'flapping-loop' (loop 1) and loop 3 of VIM-31 were not positioned as in VIM-2 but instead were closer to the active site as in VIM-4, resulting in a narrower active site in VIM-31. Also, the presence of His224 in VIM-31 disrupts hydrogen-bonding networks close to the active site. Moreover, a third zinc-binding site, which also exists in VIM-2 structures, could be identified as a structural explanation for the decreased activity of VIM-MBLs at high zinc concentrations.

PubMed: 25825035
DOI: 10.1111/febs.13283

実験手法

X-RAY DIFFRACTION (1.88 Å)