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Formation of M-Like Intermediates in Proteorhodopsin in Alkali Solutions (pH ≥ ∼8.5) Where the Proton Release Occurs First in Contrast to the Sequence at Lower pH.

Biochemistry - 23 Feb 2016

Tamogami Jun, Sato Keitaro, Kurokawa Sukuna, Yamada Takumi, Nara Toshifumi, Demura Makoto, Miyauchi Seiji, Kikukawa Takashi, Muneyuki Eiro, Kamo Naoki

Abstract excerpt

Proteorhodopsin (PR) is an outward light-driven proton pump observed in marine eubacteria. Despite many structural and functional similarities to bacteriorhodopsin (BR) in archaea, which also acts as an outward proton pump, the mechanism of the photoinduced proton release and uptake is different between two H(+)-pumps. In this study, we investigated the pH dependence of the photocycle and proton transfer in PR...

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PMID: 26812529
DOI: 10.1021/acs.biochem.5b01196

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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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