Kinetic effects of multiple charge modifications in enzyme‐substrate reactions: Brownian dynamics simulations of Cu, Zn superoxide dismutase
作者:
Jacqueline J. Sines,
J. Andrew McCammon,
Stuart A. Allison,
期刊:
Journal of Computational Chemistry
(WILEY Available online 1992)
卷期:
Volume 13,
issue 1
页码: 66-69
ISSN:0192-8651
年代: 1992
DOI:10.1002/jcc.540130108
出版商: John Wiley&Sons, Inc.
数据来源: WILEY
摘要:
AbstractWe used Brownian dynamics simulations of substrate O 2−encounters with the enzyme bovine erythrocyte Cu, Zn superoxide dismutase (SOD) to study the effects of multiple charge modifications in the enzyme on the kinetics of its diffusion‐controlled reaction. When the charges of two or three residues were changed, the calculated rate consant relative to that for the unmodified enzyme was usually found to be the product of relative rate constants for the enzymes with the corresponding single‐site changes. This “multiplicativity” rule may be useful in the design of enzymes that operate with diffusion‐controlled kinetics. Residues that deviate from the general rule are found in the active site channel of SOD, and the origin of these deviations
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