Discover Community Create You

Loading publication...

Noodle always counts identifier-free feature events for service operation. With your permission, Google Analytics can also estimate audience and engagement. Search text, publication identifiers, cookies, IP addresses and browser fingerprints are never included in Noodle's first-party event counters.

Privacy details

Article

Introduction of a hydrogen bond between phylloquinone PhQ(A) and a threonine side-chain OH group in photosystem I.

The journal of physical chemistry. B - 6 Dec 2012

Mula Sam, McConnell Michael D, Ching Amy, Zhao Nan, Gordon Heather L, Hastings Gary, Redding Kevin E, van der Est Art

Abstract excerpt

The phylloquinone acceptor PhQ(A) in photosystem I binds to the protein through a single H-bond to the backbone nitrogen of PsaA-L722. Here, we investigate the effect of this H-bond on the electron transfer (ET) kinetics by substituting threonine for PsaA-L722. Room temperature spin-polarized transient EPR measurements show that in the PsaA-L722T mutant, the rate of PhQ(A)(-) to F(X) ET increases and the...

Read the complete abstract on PubMed

Topics

Share this publication in a Topic to start or enrich a Post.

Share to Chlamydomonas reinhardtii
Share to Electron Spin Resonance Spectroscopy

Methodology Data sources Editorial policy Privacy About Contact Helena Bioinformatics

Share to Electron Transport

Share to Hydrogen Bonding

Share to Molecular Dynamics Simulation

Share to Photosystem I Protein Complex

Share to Plant Proteins

Share to Threonine

Source

Identifiers

PMID: 23137346
DOI: 10.1021/jp309410w

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.

Related research

Semantic proximity does not establish scientific evidence.

Research trail→

Click a neighbor to travelStep 1 · 12 closest

Introduction of a hydrogen bond between phylloquinone PhQ(A) and a threonine side-chain OH group in photosystem I.PMID 23137346Read ↗

Alteration of the H-bond to the A(1A) phylloquinone in Photosystem I: influence on the kinetics and energetics of electron transfer.Semantic proximity Read ↗

Interquinone electron transfer in photosystem I as evidenced by altering the hydrogen bond strength to the phylloquinone(s).Semantic proximity Read ↗

Local Electric Field Changes during the Photoconversion of the Bathy Phytochrome Agp2.Semantic proximity Read ↗

Controlling electron transfer between the two cofactor chains of photosystem I by the redox state of one of their components.Semantic proximity Read ↗

The hydrophobic recognition site formed by residues PsaA-Trp651 and PsaB-Trp627 of photosystem I in Chlamydomonas reinhardtii confers distinct selectivity for binding of plastocyanin and cytochrome c6.Semantic proximity Read ↗

Evidence that histidine forms a coordination bond to the A(0A) and A(0B) chlorophylls and a second H-bond to the A(1A) and A(1B) phylloquinones in M688H(PsaA) and M668H(PsaB) variants of Synechocystis sp. PCC 6803.Semantic proximity Read ↗

Kinetic and vibrational isotope effects of proton transfer reactions in channelrhodopsin-2.Semantic proximity Read ↗

Photoionization and electron radical recombination dynamics in photoactive yellow protein investigated by ultrafast spectroscopy in the visible and near-infrared spectral region.Semantic proximity Read ↗

The Origin of Ultrafast Multiphasic Dynamics in Photoisomerization of Bacteriophytochrome.Semantic proximity Read ↗

Formation of interacting spins on flavosemiquinone and tyrosine radical in photoreaction of a blue light sensor BLUF protein TePixD.Semantic proximity Read ↗

Photoinduced Orientation Change of the Dimer Structure of the Pr-I State of Cph1Δ2.Semantic proximity Read ↗

Time-resolved single tryptophan fluorescence in photoactive yellow protein monitors changes in the chromophore structure during the photocycle via energy transfer.Semantic proximity Read ↗

⌁Select a neighboring publication to make it the new centre.