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Protein

Photosystem II protein Y

Gene

psbY

Organism
Thermosynechococcus elongatus (strain BP-1)
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Experimental evidence at protein leveli

Functioni

Loosely associated component of the core of photosystem II, it is not always seen in crystals. PSII is a light-driven water plastoquinone oxidoreductase, using light energy to abstract electrons from H2O, generating a proton gradient subsequently used for ATP formation.1 PublicationUniRule annotation2 Publications

Cofactori

Note: PSII binds multiple chlorophylls, carotenoids and specific lipids.3 Publications

GO - Molecular functioni

GO - Biological processi

Keywordsi

Biological processPhotosynthesis

Names & Taxonomyi

Protein namesi
Recommended name:
Photosystem II protein YUniRule annotation
Gene namesi
Name:psbYUniRule annotation
Ordered Locus Names:tsl0836
OrganismiThermosynechococcus elongatus (strain BP-1)
Taxonomic identifieri197221 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaSynechococcalesSynechococcaceaeThermosynechococcus
Proteomesi
  • UP000000440 Componenti: Chromosome

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini1 – 4Lumenal1 Publication4
Transmembranei5 – 23HelicalUniRule annotationAdd BLAST19
Topological domaini24 – 41Cytoplasmic1 PublicationAdd BLAST18

GO - Cellular componenti

Keywords - Cellular componenti

Membrane, Photosystem II, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00002168951 – 41Photosystem II protein YAdd BLAST41

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei1N-formylmethionine2 Publications1

Keywords - PTMi

Formylation

Interactioni

Subunit structurei

Cyanobacterial PSII is composed of 1 copy each of membrane proteins PsbA, PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK, PsbL, PsbM, PsbT, PsbX, PsbY, PsbZ, Ycf12, 3 peripheral proteins PsbO, PsbU, PsbV and a large number of cofactors. It forms dimeric complexes. This protein is only loosely associated with PSII, and is not often found in crystals.3 Publications

Protein-protein interaction databases

DIPiDIP-48506N.
IntActiQ8DKM3. 1 interactor.
STRINGi197221.tsl0836.

Structurei

Secondary structure

141
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Helixi4 – 32Combined sources29

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
4PJ0X-ray2.44R/r1-41[»]
5KAFX-ray3.00R/r1-41[»]
5KAIX-ray2.80R/r1-41[»]
5MX2X-ray2.20R/r1-41[»]
5TISX-ray2.25R/r1-41[»]
SMRiQ8DKM3.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the PsbY family.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

HOGENOMiHOG000054627.
KOiK02723.

Family and domain databases

HAMAPiMF_00717. PSII_PsbY. 1 hit.
InterProiView protein in InterPro
IPR009388. PSII_PsbY.
PfamiView protein in Pfam
PF06298. PsbY. 1 hit.

Sequencei

Sequence statusi: Complete.

Q8DKM3-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40 
MDWRVLVVLL PVLLAAGWAV RNILPYAVKQ VQKLLQKAKA A
Length:41
Mass (Da):4,585
Last modified:July 1, 2008 - v2
Checksum:iB17D3247F887DF86
GO

Sequence cautioni

The sequence BAC08388 differs from that shown. Reason: Erroneous initiation. Translation N-terminally shortened.Curated

Mass spectrometryi

Molecular mass is 4617±4 Da from positions 1 - 41. Determined by MALDI. 1 Publication
Molecular mass is 4614 Da from positions 1 - 41. Determined by MALDI. 1 Publication

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000039 Genomic DNA. Translation: BAC08388.1. Different initiation.
RefSeqiNP_681626.1. NC_004113.1.

Genome annotation databases

EnsemblBacteriaiBAC08388; BAC08388; BAC08388.
GeneIDi1010967.
KEGGitel:tsl0836.

Similar proteinsi

Entry informationi

Entry nameiPSBY_THEEB
AccessioniPrimary (citable) accession number: Q8DKM3
Entry historyiIntegrated into UniProtKB/Swiss-Prot: October 10, 2003
Last sequence update: July 1, 2008
Last modified: November 22, 2017
This is version 85 of the entry and version 2 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

3D-structure, Complete proteome, Direct protein sequencing, Reference proteome

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  2. SIMILARITY comments
    Index of protein domains and families