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Protein

Photosystem II reaction center protein K

Gene

psbK

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

Functioni

One of the components of the core complex 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. Required for association of PsbZ and Ycf12 with PSII (PubMed:20194360).UniRule annotation4 Publications

Cofactori

Note: PSII binds multiple chlorophylls, carotenoids and specific lipids.11 Publications

GO - Biological processi

Keywordsi

Biological processPhotosynthesis

Enzyme and pathway databases

BioCyciTELO197221:G1G3I-179-MONOMER

Names & Taxonomyi

Protein namesi
Recommended name:
Photosystem II reaction center protein KUniRule annotation
Short name:
PSII-KUniRule annotation
Gene namesi
Name:psbKUniRule annotation
Ordered Locus Names:tsl0176
OrganismiThermosynechococcus elongatus (strain BP-1)
Taxonomic identifieri197221 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaSynechococcalesSynechococcaceaeThermosynechococcus
Proteomesi
  • UP000000440 Componenti: Chromosome

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini10 – 24Lumenal1 PublicationAdd BLAST15
Transmembranei25 – 38Helical1 PublicationAdd BLAST14
Topological domaini39 – 46Cytoplasmic1 Publication8

GO - Cellular componenti

Keywords - Cellular componenti

Membrane, Photosystem II, Reaction center, Thylakoid

Pathology & Biotechi

Disruption phenotypei

No changes in growth under low, medium or high light regimes (3-300 µmol photon7/2/s). PsbZ and Ycf12 are missing from isolated PSII, although low levels of PsbZ can be detected in thylakoid membranes.1 Publication

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
PropeptideiPRO_00000295431 – 9UniRule annotation2 Publications9
ChainiPRO_000002954410 – 46Photosystem II reaction center protein KUniRule annotationAdd BLAST37

Proteomic databases

PRIDEiQ9F1K9

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, 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-48496N
IntActiQ9F1K9, 1 interactor
STRINGi197221.tsl0176

Structurei

Secondary structure

146
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Helixi13 – 18Combined sources6
Helixi19 – 22Combined sources4
Helixi25 – 27Combined sources3
Helixi28 – 42Combined sources15
Turni43 – 45Combined sources3

3D structure databases

ProteinModelPortaliQ9F1K9
SMRiQ9F1K9
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiQ9F1K9

Family & Domainsi

Sequence similaritiesi

Belongs to the PsbK family.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiENOG4106815 Bacteria
ENOG410XW72 LUCA
HOGENOMiHOG000111611
KOiK02712

Family and domain databases

HAMAPiMF_00441 PSII_PsbK, 1 hit
InterProiView protein in InterPro
IPR003687 PSII_PsbK
IPR037270 PSII_PsbK_sf
PANTHERiPTHR35325 PTHR35325, 1 hit
PfamiView protein in Pfam
PF02533 PsbK, 1 hit
ProDomiView protein in ProDom or Entries sharing at least one domain
PD004458 PSII_PsbK, 1 hit
SUPFAMiSSF161037 SSF161037, 1 hit

Sequencei

Sequence statusi: Complete.

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

Q9F1K9-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40 
MIDALVLVAK LPEAYAIFDP LVDVLPVIPV LFLALAFVWQ AAVGFR
Length:46
Mass (Da):5,026
Last modified:March 1, 2001 - v1
Checksum:i45C5197F4B50E398
GO

Mass spectrometryi

Molecular mass is 4103±4 Da from positions 10 - 46. Determined by MALDI. 1 Publication
Molecular mass is 4101 Da from positions 10 - 46. Determined by MALDI. 1 Publication

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AB052850 Genomic DNA Translation: BAB20628.1
BA000039 Genomic DNA Translation: BAC07729.1
RefSeqiNP_680967.1, NC_004113.1
WP_011056031.1, NC_004113.1

Genome annotation databases

EnsemblBacteriaiBAC07729; BAC07729; BAC07729
GeneIDi1010273
KEGGitel:tsl0176
PATRICifig|197221.4.peg.182

Similar proteinsi

Entry informationi

Entry nameiPSBK_THEEB
AccessioniPrimary (citable) accession number: Q9F1K9
Entry historyiIntegrated into UniProtKB/Swiss-Prot: August 29, 2001
Last sequence update: March 1, 2001
Last modified: April 25, 2018
This is version 107 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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