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Protein

Photosystem II reaction center protein K

Gene

psbK

Organism
Cyanidium caldarium (Red alga)
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.UniRule annotation

GO - Biological processi

Keywordsi

Biological processPhotosynthesis

Names & Taxonomyi

Protein namesi
Recommended name:
Photosystem II reaction center protein KUniRule annotation
Short name:
PSII-KUniRule annotation
Gene namesi
Name:psbKUniRule annotation
Encoded oniPlastid; Chloroplast
OrganismiCyanidium caldarium (Red alga)
Taxonomic identifieri2771 [NCBI]
Taxonomic lineageiEukaryotaRhodophytaBangiophyceaeCyanidialesCyanidiaceaeCyanidium

Subcellular locationi

  • chloroplast thylakoid membrane UniRule annotation; Single-pass membrane protein UniRule annotation

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transmembranei12 – 32HelicalUniRule annotationAdd BLAST21

GO - Cellular componenti

Keywords - Cellular componenti

Chloroplast, Membrane, Photosystem II, Plastid, Reaction center, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
PropeptideiPRO_00004324681 – 4UniRule annotation4
PropeptideiPRO_00000294491 – ?
ChainiPRO_00000294505 – 41Photosystem II reaction center protein KUniRule annotationAdd BLAST37

Interactioni

Subunit structurei

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 of the oxygen-evolving complex and a large number of cofactors. It forms dimeric complexes.UniRule annotation

Structurei

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
4YUUX-ray2.77K1/K2/k1/k21-41[»]
ProteinModelPortaliQ9TLR0
SMRiQ9TLR0
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the PsbK family.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

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.

Q9TLR0-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40 
MIINQLPETY NIFAPIIDIM PVIPILFLLL AFVWQAAVGF R
Length:41
Mass (Da):4,703
Last modified:May 1, 2000 - v1
Checksum:i74BF91B0F61F837A
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF022186 Genomic DNA Translation: AAF12885.1
RefSeqiNP_045209.1, NC_001840.1

Genome annotation databases

GeneIDi800195

Similar proteinsi

Entry informationi

Entry nameiPSBK_CYACA
AccessioniPrimary (citable) accession number: Q9TLR0
Entry historyiIntegrated into UniProtKB/Swiss-Prot: June 1, 2001
Last sequence update: May 1, 2000
Last modified: November 22, 2017
This is version 62 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)

Miscellaneousi

Keywords - Technical termi

3D-structure
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Main funding by: National Institutes of Health