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Article

Aspartate-histidine interaction in the retinal schiff base counterion of the light-driven proton pump of Exiguobacterium sibiricum.

Biochemistry - 24 Jul 2012

Balashov S P, Petrovskaya L E, Lukashev E P, Imasheva E S, Dioumaev A K, Wang J M, Sychev S V, Dolgikh D A, Rubin A B, Kirpichnikov M P, Lanyi J K

Abstract excerpt

One of the distinctive features of eubacterial retinal-based proton pumps, proteorhodopsins, xanthorhodopsin, and others, is hydrogen bonding of the key aspartate residue, the counterion to the retinal Schiff base, to a histidine. We describe properties of the recently found eubacterium proton pump from Exiguobacterium sibiricum (named ESR) expressed in Escherichia coli, especially features that depend on Asp-His...

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Identifiers

PMID: 22738070
DOI: 10.1021/bi300409m
PMCID: PMC3415241

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-08.1.

Source receipt: pubmed, retrieved 7 Sept 2026.

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