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Literature DB >> 7858138

The pH dependence of the subpicosecond retinal photoisomerization process in bacteriorhodopsin: evidence for parallel photocycles.

L Song¹, S L Logunov, D Yang, M A el-Sayed.

Abstract

The pH dependence of the subpicosecond decay of the retinal photoexcited state in bacteriorhodopsin (bR) is determined in the pH range 6.8-11.3. A rapid change in the decay rate of the retinal photoexcited state is observed in the pH range 9-10, the same pH range in which a rapid change in the M412 formation kinetics was observed. This observation supports the previously proposed heterogeneity model in which parallel photocycles contribute to the observed pH dependence of the M412 formation kinetics in bR.

Entities: Chemical

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Year: 1994 PMID： 7858138 PMCID： PMC1225576 DOI： 10.1016/S0006-3495(94)80684-8

Source DB: PubMed Journal: Biophys J ISSN： 0006-3495 Impact factor: 4.033

22 in total

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Journal: Biochemistry Date: 1990-08-07 Impact factor: 3.162

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Journal: Biochemistry Date: 1990-03-06 Impact factor: 3.162

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Journal: Photochem Photobiol Date: 1992 Impact factor: 3.421

9. Redshift of the purple membrane absorption band and the deprotonation of tyrosine residues at high pH: Origin of the parallel photocycles of trans-bacteriorhodopsin.

Authors: S P Balashov; R Govindjee; T G Ebrey
Journal: Biophys J Date: 1991-08 Impact factor: 4.033

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4 in total

1. Intermediate spectra and photocycle kinetics of the Asp96 --> asn mutant bacteriorhodopsin determined by singular value decomposition with self-modeling.

Authors: L Zimányi; A Kulcsár; J K Lanyi; D F Sears; J Saltiel
Journal: Proc Natl Acad Sci U S A Date: 1999-04-13 Impact factor: 11.205