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Protein

Photosystem II CP43 reaction center protein

Gene

psbC

Organism
Cyanidium caldarium (Red alga)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Experimental evidence at protein leveli

Functioni

One of the components of the core complex of photosystem II (PSII). It binds chlorophyll and helps catalyze the primary light-induced photochemical processes of PSII. PSII is a light-driven water:plastoquinone oxidoreductase, using light energy to abstract electrons from H2O, generating O2 and a proton gradient subsequently used for ATP formation.UniRule annotation

Cofactori

Note: Binds multiple chlorophylls and provides some of the ligands for the Ca-4Mn-5O cluster of the oxygen-evolving complex. It may also provide a ligand for a Cl- that is required for oxygen evolution. PSII binds additional chlorophylls, carotenoids and specific lipids.UniRule annotation

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi354Calcium-manganese-oxide [Ca-4Mn-5O]; manganese 2UniRule annotation1
Metal bindingi354Calcium-manganese-oxide [Ca-4Mn-5O]; manganese 3UniRule annotation1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Biological processPhotosynthesis
LigandChlorophyll, Chromophore, Manganese, Metal-binding

Names & Taxonomyi

Protein namesi
Recommended name:
Photosystem II CP43 reaction center proteinUniRule annotation
Alternative name(s):
PSII 43 kDa proteinUniRule annotation
Protein CP-43UniRule annotation
Gene namesi
Name:psbCUniRule annotation
Encoded oniPlastid; Chloroplast
OrganismiCyanidium caldarium (Red alga)
Taxonomic identifieri2771 [NCBI]
Taxonomic lineageiEukaryotaRhodophytaBangiophyceaeCyanidialesCyanidiaceaeCyanidium

Subcellular locationi

  • Plastidchloroplast thylakoid membrane UniRule annotationBy similarity; Multi-pass membrane protein UniRule annotationBy similarity

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transmembranei60 – 75HelicalUniRule annotationAdd BLAST16
Transmembranei126 – 140HelicalUniRule annotationAdd BLAST15
Transmembranei167 – 183HelicalUniRule annotationAdd BLAST17
Transmembranei249 – 263HelicalUniRule annotationAdd BLAST15
Transmembranei279 – 294HelicalUniRule annotationAdd BLAST16
Transmembranei439 – 455HelicalUniRule annotationAdd BLAST17

GO - Cellular componenti

Keywords - Cellular componenti

Chloroplast, Membrane, Photosystem II, Plastid, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00000775111 – 460Photosystem II CP43 reaction center proteinUniRule annotationAdd BLAST460

Proteomic databases

PRIDEiQ9TM46.

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-ray2.77C1/C2/c1/c21-460[»]
ProteinModelPortaliQ9TM46.
SMRiQ9TM46.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the PsbB/PsbC family. PsbC subfamily.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

Family and domain databases

HAMAPiMF_01496. PSII_PsbC_CP43. 1 hit.
InterProiView protein in InterPro
IPR000932. PS_antenna-like.
IPR005869. PSII_PsbC.
PfamiView protein in Pfam
PF00421. PSII. 1 hit.
SUPFAMiSSF161077. SSF161077. 1 hit.
TIGRFAMsiTIGR01153. psbC. 1 hit.

Sequencei

Sequence statusi: Complete.

Q9TM46-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MLFNKDKNNI GGRSIESTGF AWWSGNARLI NLSGKLLGAH VAHAGLIVFW
60 70 80 90 100
TGAMTLFETS HFIPEKPLYE QGMILLPHLA TLGWGVAPGG EIVNTYPYFA
110 120 130 140 150
TGVIHLVSSA VLGFGGIYHS IVGPDVLEDS FSFFGYDWRD KNKMTTILGI
160 170 180 190 200
HLILLGIGAF LLVIKALFIG GIYDTWAPGG GDIRFITNPT LNPAIIFSYL
210 220 230 240 250
LKSPFGGEGW IVGVNNMEDV IGGHIWIGVT CVIGGIWHIL TRPFSWARRA
260 270 280 290 300
FVWSGEAYLS YSLGALALMG QTAAEYAWYN NTVYPSEFYG PTAAEASQAQ
310 320 330 340 350
AFTFLVRDQR LGANIASTQG PTGLGKYLMR SPTGEVILGG ETMRFWDLRA
360 370 380 390 400
PWLEPLRSSN GLDLNKIKND IQPWQERRAA EYMTHAPLGS LNSVGGVATE
410 420 430 440 450
INSVNYVSPR SWLTTSHFFL GFFIFIGHLW HAGRARAAAA GFEKGINREN
460
EPVLSMRPLD
Length:460
Mass (Da):50,471
Last modified:May 1, 2000 - v1
Checksum:i4CA62E2DEF43D78D
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF022186 Genomic DNA. Translation: AAF13025.1.
RefSeqiNP_045020.2. NC_001840.1.

Genome annotation databases

GeneIDi800249.

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.

Entry informationi

Entry nameiPSBC_CYACA
AccessioniPrimary (citable) accession number: Q9TM46
Entry historyiIntegrated into UniProtKB/Swiss-Prot: June 1, 2001
Last sequence update: May 1, 2000
Last modified: March 15, 2017
This is version 74 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)

Miscellaneousi

Keywords - Technical termi

3D-structure

Documents

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