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Article

The critical role of a hydrogen bond between Gln63 and Trp104 in the blue-light sensing BLUF domain that controls AppA activity.

Journal of molecular biology - 18 May 2007

Masuda Shinji, Tomida Yoshiyuki, Ohta Hiroyuki, Takamiya Ken-Ichiro

Abstract excerpt

AppA is a novel blue-light receptor that controls photosynthetic gene expression in the purple bacterium Rhodobacter sphaeroides. The photocycle reaction of the light-sensing domain, BLUF, is unique in the sense that a few hydrogen bond rearrangements are accompanied by only slight structural cha...

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Identifiers

PMID: 17399741
DOI: 10.1016/j.jmb.2007.02.087

Provenance

PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 2 Sept 2026. Prepared record publication-17399741-2026-09-02.2. Manifest publication-graph-cohort-2026-09-02.2.

Source receipt: PubMed via Helena Literature Corpus, retrieved 2 Sept 2026.

Related research

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The critical role of a hydrogen bond between Gln63 and Trp104 in the blue-light sensing BLUF domain that controls AppA activity.PMID 17399741Read ↗

A Q63E Rhodobacter sphaeroides AppA BLUF domain mutant is locked in a pseudo-light-excited signaling state.Semantic proximity Read ↗

Crystal structures of the AppA BLUF domain photoreceptor provide insights into blue light-mediated signal transduction.Semantic proximity Read ↗

In vivo effects on photosynthesis gene expression of base pair exchanges in the gene encoding the light-responsive BLUF domain of AppA in Rhodobacter sphaeroides.Semantic proximity Read ↗

Structural refinement of a key tryptophan residue in the BLUF photoreceptor AppA by ultraviolet resonance Raman spectroscopy.Semantic proximity Read ↗

Spectroscopic studies of the AppA BLUF domain from Rhodobacter sphaeroides: addressing movement of tryptophan 104 in the signaling state.Semantic proximity Read ↗

Serine in BLUF domains displays spectral importance in computational models.Semantic proximity Read ↗

Ultrafast structural dynamics in BLUF domains: transient infrared spectroscopy of AppA and its mutants.Semantic proximity Read ↗

Tryptophan at position 104 is involved in transforming light signal into changes of beta-sheet structure for the signaling state in the BLUF domain of AppA.Semantic proximity Read ↗

Electron transfer quenching in light adapted and mutant forms of the AppA BLUF domain.Semantic proximity Read ↗

The role of key amino acids in the photoactivation pathway of the Synechocystis Slr1694 BLUF domain.Semantic proximity Read ↗

Probing the allostery in dimeric near-infrared biomarkers derived from the bacterial phytochromes: The impact of the T204A substitution on the inter-monomer interaction.Semantic proximity Read ↗

Modulation of the photocycle of a LOV domain photoreceptor by the hydrogen-bonding network.Semantic proximity Read ↗

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