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Article

Different dark conformations function in color-sensitive photosignaling by the sensory rhodopsin I-HtrI complex.

Biophysical journal - 1 Jun 2007

Sasaki Jun, Phillips Brian J, Chen Xinpu, Van Eps Ned, Tsai Ah-Lim, Hubbell Wayne L, Spudich John L

Abstract excerpt

The haloarchaeal phototaxis receptor sensory rhodopsin I (SRI) in complex with its transducer HtrI delivers an attractant signal from excitation with an orange photon and a repellent signal from a second near-UV photon excitation. Using a proteoliposome system with purified SRI in complex with its transducer HtrI, we identified by site-directed fluorescence labeling a site (Ser(155)) on SRI that is...

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Identifiers

PMID: 17351006
DOI: 10.1529/biophysj.106.101121
PMCID: PMC1868990

Genes

SRI

Provenance

PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 6 Sept 2026. Manifest publication-graph-cohort-2026-09-06.1.

Source receipt: pubmed, retrieved 6 Sept 2026.

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Different dark conformations function in color-sensitive photosignaling by the sensory rhodopsin I-HtrI complex.PMID 17351006Read ↗

The cytoplasmic membrane-proximal domain of the HtrII transducer interacts with the E-F loop of photoactivated Natronomonas pharaonis sensory rhodopsin II.Semantic proximity Read ↗

A Schiff base connectivity switch in sensory rhodopsin signaling.Semantic proximity Read ↗

Signal relay from sensory rhodopsin I to the cognate transducer HtrI: assessing the critical change in hydrogen-bonding between Tyr-210 and Asn-53.Semantic proximity Read ↗

Suppressor mutation analysis of the sensory rhodopsin I-transducer complex: insights into the color-sensing mechanism.Semantic proximity Read ↗

Direct observation of the structural change of Tyr174 in the primary reaction of sensory rhodopsin II.Semantic proximity Read ↗

Structural changes of sensory rhodopsin I and its transducer protein are dependent on the protonated state of Asp76.Semantic proximity Read ↗

Five residues in the HtrI transducer membrane-proximal domain close the cytoplasmic proton-conducting channel of sensory rhodopsin I.Semantic proximity Read ↗

Protonatable residues at the cytoplasmic end of transmembrane helix-2 in the signal transducer HtrI control photochemistry and function of sensory rhodopsin I.Semantic proximity Read ↗

The signal transfer from the receptor NpSRII to the transducer NpHtrII is not hampered by the D75N mutation.Semantic proximity Read ↗

Structural analysis of a HAMP domain: the linker region of the phototransducer in complex with sensory rhodopsin II.Semantic proximity Read ↗

A microbial rhodopsin with a unique retinal composition shows both sensory rhodopsin II and bacteriorhodopsin-like properties.Semantic proximity Read ↗

Spectral tuning in sensory rhodopsin I from Salinibacter ruber.Semantic proximity Read ↗

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