Biochemistry (Moscow)

, Volume 66, Issue 11, pp 1269–1276

Infrared Methods for Monitoring the Protonation State of Carboxylic Amino Acids in the Photocycle of Bacteriorhodopsin

  • A. K. Dioumaev

DOI: 10.1023/A:1013135419529

Cite this article as:
Dioumaev, A.K. Biochemistry (Moscow) (2001) 66: 1269. doi:10.1023/A:1013135419529


This review deals with the role of carboxylic amino acids in the proton-transport activity of bacteriorhodopsin. The main focus is on the infrared data, which allow direct monitoring of the protonation/deprotonation of specific residues during the proton movement in the course of the photocycle. Additional attention is paid to the potential use of carboxylic acids in proteins as internal sensors, based on the sensitivity of their IR frequencies to the immediate environment.

retinal proteins FTIR time-resolved aspartic acid glutamic acid COOH stretch symmetric and antisymmetric stretching vibrations carbonyl carboxyl carboxylate 

Copyright information

© MAIK “Nauka/Interperiodica” 2001

Authors and Affiliations

  • A. K. Dioumaev
    • 1
  1. 1.Department of Physiology and BiophysicsUniversity of CaliforniaIrvine, IrvineUSA

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