A short, strong hydrogen bond in the active site of human carbonic anhydrase II.
A short, strong hydrogen bond in the active site of human carbonic anhydrase II.
复制标题
人类碳赤霉素II的活性位点中的短而强的氢键。
DOI:
10.1021/bi902007b
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发表时间:
2010-01-19
期刊:
影响因子:
2.9
通讯作者:
McKenna, Robert
中科院分区:
文献类型:
--
作者:
Avvaru, Balendu Sankara;Kim, Chae Un;Sippel, Katherine H.;Gruner, Sol M.;Agbandje-McKenna, Mavis;Silverman, David N.;McKenna, Robert
The crystal structure of human carbonic anhydrase II (HCA II) obtained at 0.9 Å resolution reveals that a water molecule, termed deep water, Dw, and bound in a hydrophobic pocket of the active site forms a short, strong hydrogen bond with the zinc-bound solvent molecule, a conclusion based on the observed oxygen-oxygen distance of 2.45 Å. This water structure has similarities with hydrated hydroxide found in crystals of certain inorganic complexes. The energy required to displace Dw contributes in significant part to the weak binding of CO2 in the enzyme-substrate complex, a weak binding that enhances kcat for the conversion of CO2 into bicarbonate. In addition, this short, strong hydrogen bond is expected to contribute to the low pKa of the zinc-bound water and to promote proton transfer in catalysis.
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影响因子:
3.3
作者:
Roy, Arijit;Taraphder, Srabani
通讯作者:
Taraphder, Srabani
DOI:
10.1073/pnas.0904184106
发表时间:
2009-06-30
影响因子:
11.1
作者:
Sjoeblom, Bjoern;Polentarutti, Maurizio;Djinovic-Carugo, Kristina
通讯作者:
Djinovic-Carugo, Kristina
DOI:
10.1002/prot.340170112
发表时间:
1993-09-01
期刊:
PROTEINS-STRUCTURE FUNCTION AND GENETICS
影响因子:
--
作者:
XUE, YF;LILJAS, A;LINDSKOG, S
通讯作者:
LINDSKOG, S
影响因子:
3.3
作者:
Cui, Q;Karplus, M
通讯作者:
Karplus, M
影响因子:
15
作者:
Smedarchina, Z;Siebrand, W;Cui, Q
通讯作者:
Cui, Q