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Protein

Cytochrome b559 subunit beta

Gene

psbF

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

Functioni

This b-type cytochrome is tightly associated with the reaction center of photosystem II (PSII). PSII is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H2O, generating O2 and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation.UniRule annotation3 Publications

Cofactori

heme bUniRule annotationNote: With its partner (PsbE) binds heme. PSII binds additional chlorophylls, carotenoids and specific lipids.UniRule annotation12 Publications

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi24Iron (heme axial ligand); shared with alpha subunit9 PublicationsUniRule annotation2 Publications1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Biological processElectron transport, Photosynthesis, Transport
LigandHeme, Iron, Metal-binding

Enzyme and pathway databases

BioCyciTELO197221:G1G3I-1569-MONOMER

Names & Taxonomyi

Protein namesi
Recommended name:
Cytochrome b559 subunit betaUniRule annotation
Alternative name(s):
PSII reaction center subunit VIUniRule annotation
Gene namesi
Name:psbFUniRule annotation
Ordered Locus Names:tsr1542
OrganismiThermosynechococcus elongatus (strain BP-1)
Taxonomic identifieri197221 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaSynechococcalesSynechococcaceaeThermosynechococcus
Proteomesi
  • UP000000440 Componenti: Chromosome

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini2 – 19Cytoplasmic1 PublicationAdd BLAST18
Transmembranei20 – 35Helical1 PublicationAdd BLAST16
Topological domaini36 – 45Lumenal1 Publication10

GO - Cellular componenti

Keywords - Cellular componenti

Membrane, Photosystem II, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Initiator methionineiRemoved3 Publications
ChainiPRO_00002004722 – 45Cytochrome b559 subunit betaAdd BLAST44

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei2N-acetylthreonine2 Publications1

Keywords - PTMi

Acetylation

PTM databases

iPTMnetiQ8DIN9

Interactioni

Subunit structurei

Heterodimer of an alpha subunit and a beta subunit. 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, at least 3 peripheral proteins PsbO, PsbU, PsbV and a large number of cofactors. It forms dimeric complexes.UniRule annotation10 Publications

Protein-protein interaction databases

DIPiDIP-48492N
IntActiQ8DIN9, 1 interactor
STRINGi197221.tsr1542

Structurei

Secondary structure

145
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Beta strandi11 – 13Combined sources3
Helixi18 – 40Combined sources23

3D structure databases

ProteinModelPortaliQ8DIN9
SMRiQ8DIN9
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiQ8DIN9

Family & Domainsi

Sequence similaritiesi

Belongs to the PsbE/PsbF family.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiENOG410689D Bacteria
ENOG410XVPP LUCA
HOGENOMiHOG000091420
KOiK02708
OrthoDBiPOG091H13V8

Family and domain databases

HAMAPiMF_00643 PSII_PsbF, 1 hit
InterProiView protein in InterPro
IPR006241 PSII_cyt_b559_bsu
IPR006216 PSII_cyt_b559_CS
IPR013081 PSII_cyt_b559_N
PANTHERiPTHR33391:SF3 PTHR33391:SF3, 1 hit
PfamiView protein in Pfam
PF00283 Cytochrom_B559, 1 hit
PIRSFiPIRSF000037 PsbF, 1 hit
TIGRFAMsiTIGR01333 cyt_b559_beta, 1 hit
PROSITEiView protein in PROSITE
PS00537 CYTOCHROME_B559, 1 hit

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

Q8DIN9-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40 
MTSNTPNQEP VSYPIFTVRW VAVHTLAVPT IFFLGAIAAM QFIQR
Length:45
Mass (Da):5,065
Last modified:March 1, 2003 - v1
Checksum:iC8D3083549A696C0
GO

Mass spectrometryi

Molecular mass is 4981±5 Da from positions 2 - 45. Determined by MALDI. 1 Publication
Molecular mass is 4977 Da from positions 2 - 45. Determined by MALDI. 1 Publication

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000039 Genomic DNA Translation: BAC09094.1
RefSeqiNP_682332.1, NC_004113.1
WP_011057382.1, NC_004113.1

Genome annotation databases

EnsemblBacteriaiBAC09094; BAC09094; BAC09094
GeneIDi1011058
KEGGitel:tsr1542
PATRICifig|197221.4.peg.1618

Similar proteinsi

Entry informationi

Entry nameiPSBF_THEEB
AccessioniPrimary (citable) accession number: Q8DIN9
Entry historyiIntegrated into UniProtKB/Swiss-Prot: May 30, 2003
Last sequence update: March 1, 2003
Last modified: April 25, 2018
This is version 114 of the entry and version 1 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

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