Bacteriorhodopsin. Correspondence of the Photocycle and Electrogenesis with Sites of the Molecule

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L. V. Khitrina^* and A. L. Ksenofontov

Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia; fax: (7-095) 939-3181; E-mail: khitr@phtbio.genebee.msu.su; ksenofon@belozersky.msu.ru

^* To whom correspondence should be addressed.

Received July 21, 2004

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Correspondence of phases of electrogenesis, photocycle transitions, and proton transfer with the proton transporting groups of bacteriorhodopsin was studied. The structure of bacteriorhodopsin was considered by the file 1c3w and projections of sites of the proton movement pathway onto the normal to the purple membrane were measured. The dielectric permeability of the terminal site of the semichannel Schiff base --> external surface of the purple membrane was noticeably higher than in the center of the membrane.

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KEY WORDS: bacteriorhodopsin, purple membranes, 1c3w, electrogenesis, proton transport, photocycle, distance between proton-transporting groups

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