PHOTOREACTIONS OF THE PHOTOINTERMEDIATES OF BACTERIORHODOPSIN
PHOTOREACTIONS OF THE PHOTOINTERMEDIATES OF BACTERIORHODOPSIN
复制标题
细菌视紫红质光中间体的光反应
DOI:
--
复制
发表时间:
1995
期刊:
影响因子:
--
通讯作者:
S. Balashov
中科院分区:
文献类型:
--
作者:
S. Balashov
The photochemical reactions of the intermediates of the photochemical cycle of bacteriorhodopsin (bR) are reviewed. These reactions constitute photochemical control of the cycle and provide an independent approach for the investigation of the mechanism of light energy transduction in the purple membrane. The absorption of a light quantum by the K, L, or M intermediates converts them back to bR. These transformations interrupt the photocycle so that no proton transfer occurs after absorption of the second quantum. The action of blue light on the M intermediate causes structural changes of the chromophore, as a result of which the Schiff base is reprotonated from Asp-85, not from Asp-96 as in the usual thermal transition of M. The photoreactions of the L, M, N, and O intermediates lead to the formation of new photoproducts. Studies of the photoconversion of the intermediates can serve as an additional source of information on the nature of photoprocesses in bR: they reveal several conformers of K and bR at 90 K, different M states, two N intermediates, and provide direct evidence for the existence of a thermal back reaction from N to M. The study of the photoreactions of the J, K, L, M, N, and O intermediates is a promising method for elucidating the structures and roles of these states. Reversible photoconversions of bR and its photointermediates provide a basis for potential applications of bR in optical registration of information.
登录
查看更多内容
影响因子:
2.9
作者:
L. Zimányi;G. Varo;Man Chang;B. Ni;R. Needleman;J. Lanyi
通讯作者:
L. Zimányi;G. Varo;Man Chang;B. Ni;R. Needleman;J. Lanyi
影响因子:
2.9
作者:
BALASHOV, SP;GOVINDJEE, R;MENICK, DR
通讯作者:
MENICK, DR
影响因子:
2.9
作者:
AMES, JB;MATHIES, RA
通讯作者:
MATHIES, RA
DOI:
10.1073/pnas.86.23.9228
发表时间:
1989-12-01
影响因子:
11.1
作者:
OTTO, H;MARTI, T;HEYN, MP
通讯作者:
HEYN, MP
影响因子:
2.9
作者:
Yan,B;Xie,A;Nienhaus,GU;Katsuta,Y;Spudich,JL
通讯作者:
Spudich,JL