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Protein

Photosystem II CP47 reaction center protein

Gene

psbB

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. PSII binds additional chlorophylls, carotenoids and specific lipids.UniRule annotation

GO - Molecular functioni

GO - Biological processi

Keywordsi

Biological processPhotosynthesis
LigandChlorophyll, Chromophore

Names & Taxonomyi

Protein namesi
Recommended name:
Photosystem II CP47 reaction center proteinUniRule annotation
Alternative name(s):
PSII 47 kDa proteinUniRule annotation
Protein CP-47UniRule annotation
Gene namesi
Name:psbBUniRule annotation
Encoded oniPlastid; Chloroplast
OrganismiCyanidium caldarium (Red alga)
Taxonomic identifieri2771 [NCBI]
Taxonomic lineageiEukaryotaRhodophytaBangiophyceaeCyanidialesCyanidiaceaeCyanidium

Subcellular locationi

  • Plastidchloroplast thylakoid membrane UniRule annotation; Multi-pass membrane protein UniRule annotation

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transmembranei21 – 36HelicalUniRule annotationAdd BLAST16
Transmembranei101 – 115HelicalUniRule annotationAdd BLAST15
Transmembranei140 – 156HelicalUniRule annotationAdd BLAST17
Transmembranei203 – 218HelicalUniRule annotationAdd BLAST16
Transmembranei237 – 252HelicalUniRule annotationAdd BLAST16
Transmembranei457 – 472HelicalUniRule annotationAdd BLAST16

GO - Cellular componenti

Keywords - Cellular componenti

Chloroplast, Membrane, Photosystem II, Plastid, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00000774791 – 509Photosystem II CP47 reaction center proteinAdd BLAST509

Proteomic databases

PRIDEiO19928.

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-ray2.77B1/B2/b1/b21-509[»]
ProteinModelPortaliO19928.
SMRiO19928.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

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

Keywords - Domaini

Transmembrane, Transmembrane helix

Family and domain databases

HAMAPiMF_01495. PSII_PsbB_CP47. 1 hit.
InterProiView protein in InterPro
IPR000932. PS_antenna-like.
IPR017486. PSII_PsbB.
PfamiView protein in Pfam
PF00421. PSII. 1 hit.
SUPFAMiSSF161077. SSF161077. 1 hit.
TIGRFAMsiTIGR03039. PS_II_CP47. 1 hit.

Sequencei

Sequence statusi: Complete.

O19928-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MALPWYRVHT VVLNDPGRLI SVHLMHTALV SGWAGSMALY ELAVFDPSDP
60 70 80 90 100
VLNPMWRQGM FVMPFMARLG VTDSWGGWSI TGESVSNPGL WSFEGVALTH
110 120 130 140 150
IVLSGLLFLA SIWHWVYWDL DLFRDPRTLE PALDLPKVFG IHLVLSSLLC
160 170 180 190 200
FGFGAFHVTG LFGPGIWISD AYGLTGRIQS VAPAWGPEGF NPFNPGGIAS
210 220 230 240 250
HHIAAGTVGI LAGVFHLNVR PPQRLYRALR MGNIETVLSS SIAAVFFASF
260 270 280 290 300
VVSGTMWYGA ASTPIELFGP TRYQWDSGYF QQEIEKRVEE SLSNGLSLPE
310 320 330 340 350
AWSNIPDKLA FYDYIGNNPA KGGLFRAGPM NKGDGIAEAW LGHPVFQDKE
360 370 380 390 400
GHELIVRRMP AFFENFPIIL VDKDGIIRAD IPFRRAESKY SIEQVGVTCS
410 420 430 440 450
FYGGKLNNQS FKDASTVKKY ARKAQFGEVF EFDRTILDSD GVFRSSPRGW
460 470 480 490 500
FTFGHANFAL LFFFGHLWHG SRTLFRDVFA GIGAEVTEQV EFGVFQKVGD

KTTKKQGYV
Length:509
Mass (Da):56,562
Last modified:January 1, 1998 - v1
Checksum:iD786C058AD3217D6
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF022186 Genomic DNA. Translation: AAB82661.1.
PIRiT11996.
RefSeqiNP_045100.1. NC_001840.1.

Genome annotation databases

GeneIDi800168.

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 nameiPSBB_CYACA
AccessioniPrimary (citable) accession number: O19928
Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 15, 1998
Last sequence update: January 1, 1998
Last modified: March 15, 2017
This is version 78 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