On the role of arginine-glutamic acid ion pair in the ATP hydrolysis

被引:8
|
作者
Carmona, P
Molina, M
Rodríguez-Casado, A
机构
[1] CSIC, Inst Estructura Mat, E-28006 Madrid, Spain
[2] Escuela Univ Opt, Dept Quim Organ 1, Madrid 28037, Spain
关键词
ATP hydrolysis; Fourier transform infrared spectroscopy; hydrogen bonding;
D O I
10.1016/j.bpc.2005.08.006
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The complex between adenosine triphosphate (ATP) and 4-guanidinobutyric acid (GBA) has been studied by infrared spectroscopy dry and hydrated (60% relative humidity). Partial nonenzymic hydrolysis has been detected, as deduced from characteristic bands of adenosine diphosphate (ADP) and inorganic orthophosphate formation. An infrared continuum, which increases upon hydration, demonstrates that the hydrogen bonded system in this complex has a large proton polarizability due to collective proton fluctuation. On this basis, a mechanism for splitting of lytic water molecules is also discussed. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:33 / 37
页数:5
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