蛋白质间电子隧穿的不同情形：水介导途径的影响
Different scenarios for inter-protein electron tunneling: the effect of water-mediated pathways.
作者信息
Miyashita O, Axelrod H L, Onuchic J N
机构信息
University of California, San Diego, 9500 Gilman Dr, La Jolla, California U.S.A.
出版信息
J Biol Phys. 2002 Sep;28(3):383-94. doi: 10.1023/A:1020308521041.
Abstract
Recent theoretical developments now allow for reliable calculation oftunneling matrix elements in unimolecular biological electron transferreactions that have been tested experimentally. Most biological ETprocesses, however, are bimolecular, or involve large-scale proteindomain motions. In this paper, initial advances in this direction bystudying the inter-protein electron transfer between cytochrome c(2)andthe photosynthetic reaction center. Utilizing an approach that integratesmolecular dynamics and the Pathways method, we have observed that theensemble dominant tunneling pathways in this reaction go though thetyrosine 162 or are water mediated.
摘要
最近的理论进展使得在已通过实验验证的单分子生物电子转移反应中可靠计算隧穿矩阵元成为可能。然而，大多数生物电子转移过程是双分子的，或者涉及大规模的蛋白质结构域运动。在本文中，通过研究细胞色素c₂与光合反应中心之间的蛋白质间电子转移，在这个方向上取得了初步进展。利用一种整合分子动力学和路径方法的途径，我们观察到该反应中总体占主导的隧穿途径是通过酪氨酸162或由水介导的。
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