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Article

Tyrosine 263 in cyanobacterial phytochrome Cph1 optimizes photochemistry at the prelumi-R→lumi-R step.

Photochemistry and photobiology - 1 Jan 2000

Sineshchekov Vitaly, Mailliet Joel, Psakis Georgios, Feilke Kathleen, Kopycki Jakub, Zeidler Mathias, Essen Lars-Oliver, Hughes Jon

Abstract excerpt

We report a low-temperature fluorescence spectroscopy study of the PAS-GAF-PHY sensory module of Cph1 phytochrome, its Y263F mutant (both with known 3D structures) as well as Y263H and Y263S to connect their photochemical parameters with intramolecular interactions. None of the holoproteins showed photochemical activity at low temperature, and the activation barriers for the Pr→lumi-R photoreaction (2.5-3.1 kJ...

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PMID: 24571438
DOI: 10.1111/php.12263

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-07.1.

Source receipt: pubmed, retrieved 7 Sept 2026.

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