Accession Number : ADA190237

Title :   Electrochemical Study of Phototransduction in Protein Pigment-Containing Model Membranes.

Descriptive Note : Annual rept. 1 Dec 86-30 Nov 87,

Corporate Author : WAYNE STATE UNIV DETROIT MICH DEPT OF PSYCHOLOGY

Personal Author(s) : Hong, Felix T

PDF Url : ADA190237

Report Date : 21 Dec 1987

Pagination or Media Count : 13

Abstract : The objective of this project is to use primarily an electrochemical approach to study the fundamental molecular processes that underlie the light-mediated sensory and energy transduction in model retinal protein membranes. Most light-mediated energy transducing membranes utilize chlorophyll protein complexes as the 'reaction centers' whereas most light-mediated sensory transducing membranes utilize retinal proteins as the light-sensing elements. At a superficial level the only thing in common to both types of membranes is the asymmetrical orientation of the membrane-bound pigment-proteins. The retinal protein, bacteriorhodopsin, from the purple membrane of Halobacterium halobium is a light-driven proton pump. It is unique in the sense that it is similar to the visual pigment rhodopsin chemically but similar to the chlorophyll protein complexes functionally. The bacteriorhodopsin system thus presents an unusual opportunity to gain insights into possible common designs in the photosynthetic and the visual membranes.

Descriptors :   *ELECTROCHEMISTRY, *PIGMENTS, *PROTEINS, *RETINA, *MEMBRANES(BIOLOGY), *PHOTOACTIVATION ANALYSIS, ASYMMETRY, CHLOROPHYLLS, EYE PIGMENTS, MODELS, OPTICAL IMAGES, ORIENTATION(DIRECTION), PHOTORECEPTORS, PHOTOSENSITIVITY(BIOLOGICAL)

Subject Categories : Radiation and Nuclear Chemistry
      Anatomy and Physiology
      Microbiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE