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Article

Proton translocation by bacteriorhodopsin in the absence of substantial conformational changes.

Journal of molecular biology - 31 May 2002

Tittor J, Paula S, Subramaniam S, Heberle J, Henderson R, Oesterhelt D

Abstract excerpt

Unlike wild-type bacteriorhodopsin (BR), the BR triple mutant D96G/F171C/F219L has been shown to undergo only minor structural rearrangements during its photocycle. Nonetheless, the mutant is capable of transporting protons at a rate of 125(+/-40) H+/BR per minute under light-saturating conditions. Light adaptation of the triple mutant's retinal proceeds in a pH-dependent manner up to a maximum of 63% all-trans....

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PMID: 12051928
DOI: 10.1016/S0022-2836(02)00307-8

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