Mechanism by which untwisting of retinal leads to productive bacteriorhodopsin photocycle states.
Mechanism by which untwisting of retinal leads to productive bacteriorhodopsin photocycle states.
复制标题
视网膜解旋导致产生高效细菌视紫红质光循环状态的机制
DOI:
10.1021/jp505818r
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
N. Bondar
中科院分区:
文献类型:
--
作者:
T. Wolter;M. Elstner;S. Fischer;J. C. Smith;N. Bondar
Relaxation of the twisted-retinal photoproduct state triggers proton-coupled reaction cycle in retinal proteins. Given the crowded protein environments in which the retinal resides, a key open question is whether the retinal relaxation path is governed by the intrinsic torsional properties of the retinal or rather by the interactions of the retinal with protein and water groups. Here we address this question by performing systematic quantum mechanical/molecular mechanical molecular dynamics computations of retinal dynamics in bacteriorhodopsin at different temperatures, reaction path computations, and assessment of the vibrational fingerprints of the retinal molecule. The results demonstrate a complex dependence of the retinal dynamics and preferred geometry on temperature. As the temperature increases, the retinal dihedral angle samples values largely determined by its internal conformational energy. The protein environment shapes the energetics of retinal relaxation and provides hydrogen-bonding partners that stabilize the retinal geometry.
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DOI:
--
发表时间:
1980
期刊:
Biophysics of Structure and Mechanism
影响因子:
--
作者:
T. Iwasa;F. Tokunaga;T. Yoshizawa
通讯作者:
T. Yoshizawa
影响因子:
3.5
作者:
G. Metz;F. Siebert;Martin Engelhard
通讯作者:
Martin Engelhard
影响因子:
64.8
作者:
L. Essen;D. Oesterhelt
通讯作者:
D. Oesterhelt
DOI:
10.1073/pnas.79.2.403
发表时间:
1982-01-01
期刊:
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子:
--
作者:
BRAIMAN, M;MATHIES, R
通讯作者:
MATHIES, R
影响因子:
5.7
作者:
Bondar, AN;Elstner, M;Fischer, S
通讯作者:
Fischer, S