Electron transfer pathways in cytochrome c oxidase.
Electron transfer pathways in cytochrome c oxidase.
复制标题
DOI:
10.1016/j.bbabio.2011.03.003
复制
发表时间:
2011-10
影响因子:
4.3
通讯作者:
Guallar, Victor
中科院分区:
文献类型:
--
作者:
Fatima Lucas, M.;Rousseau, Denis L.;Guallar, Victor
Mixed quantum mechanical/molecular mechanics calculations, were used to explore the electron pathway of the terminal electron transfer enzyme, Cytochrome c Oxidase. This enzyme catalyzes the reduction of molecular oxygen to water in a multiple step process. Density functional calculations on the three redox centers allowed for the characterization of the electron transfer mechanism, following the sequence CuA → heme a → heme a3. This process is largely affected by the presence of positive charges, confirming the possibility of a proton coupled electron transfer. An extensive mapping of all residues involved in the electron transfer, between the CuA center (donor) and the O2 reduction site heme a3-CuB (receptor), was obtained by selectively activating/deactivating different quantum regions. The method employed, called QM/MM e-pathway, allowed the identification of key residues along the possible electron transfer paths, consistent with experimental data. In particular, the role of arginines 481 and 482 appears crucial in the CuA → heme a and in the heme a → heme a3 electron transfer processes.
登录
查看更多内容
影响因子:
64.8
作者:
IWATA, S;OSTERMEIER, C;MICHEL, H
通讯作者:
MICHEL, H
影响因子:
56.9
作者:
BERATAN, DN;ONUCHIC, JN;GRAY, HB
通讯作者:
GRAY, HB
影响因子:
4.4
作者:
BECKE, AD
通讯作者:
BECKE, AD
DOI:
10.1006/bbrc.1995.1938
发表时间:
1995-07-06
影响因子:
3.1
作者:
FEE, JA;SANDERS, D;VANNGARD, T
通讯作者:
VANNGARD, T
影响因子:
4.8
作者:
Ji, H;Yeh, SR;Rousseau, DL
通讯作者:
Rousseau, DL