Quantum Calculations of Electron Tunneling in Respiratory Complex III.
Quantum Calculations of Electron Tunneling in Respiratory Complex III.
复制标题
呼吸复合体中电子隧道效应的量子计算 III。
DOI:
10.1021/acs.jpcb.5b09424
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
Stuchebrukhov,AlexeiA
中科院分区:
文献类型:
--
作者:
Hagras,MuhammadA;Hayashi,Tomoyuki;Stuchebrukhov,AlexeiA
The most detailed and comprehensive to date study of electron transfer reactions in the respiratory complex III of aerobic cells, also known asbc1complex, is reported. In the framework of the tunneling current theory, electron tunneling rates and atomistic tunneling pathways between different redox centers were investigated for all electron transfer reactions comprising different stages of the proton-motive Q-cycle. The calculations reveal that complex III is a smart nanomachine, which under certain conditions undergoes conformational changes gating electron transfer, or channeling electrons to specific pathways. One-electron tunneling approximation was adopted in the tunneling calculations, which were performed using hybrid Broken-Symmetry (BS) unrestricted DFT/ZINDO levels of theory. The tunneling orbitals were determined using an exact biorthogonalization scheme that uniquely separates pairs of tunneling orbitals with small overlaps out of the remaining Franck–Condon orbitals with significant overlap. Electron transfer rates in different redox pairs show exponential distance dependence, in agreement with the reported experimental data; some reactions involve coupled proton transfer. Proper treatment of a concerted two-electron bifurcated tunneling reaction at the Qosite is given.
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影响因子:
2
作者:
MITCHELL, P
通讯作者:
MITCHELL, P
影响因子:
6.3
作者:
BERENDSEN, HJC;VANDERSPOEL, D;VANDRUNEN, R
通讯作者:
VANDRUNEN, R
DOI:
--
发表时间:
1992
期刊:
European Journal of Biochemistry
影响因子:
--
作者:
G. Bechmann;H. Weiss;P. Rich
通讯作者:
P. Rich
DOI:
10.1021/jp512699a
发表时间:
2015
期刊:
The journal of physical chemistry. B
影响因子:
--
作者:
Hagras,MuhammadA;Stuchebrukhov,AlexeiA
通讯作者:
Stuchebrukhov,AlexeiA
影响因子:
3.7
作者:
CROFTS, AR;WANG, ZG
通讯作者:
WANG, ZG