Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
Protein

Photosystem II reaction center protein I

Gene

psbI

Organism
Thermosynechococcus elongatus (strain BP-1)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

One of the components of the core complex of photosystem II (PSII). May be required for formation of PSII dimers but not their subsequent stability (PubMed:21195048). 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 annotation4 Publications

Cofactori

Note: PSII binds multiple chlorophylls, carotenoids and specific lipids.10 Publications

GO - Biological processi

Keywordsi

Biological processPhotosynthesis

Names & Taxonomyi

Protein namesi
Recommended name:
Photosystem II reaction center protein IUniRule annotation
Short name:
PSII-IUniRule annotation
Alternative name(s):
PSII 4.4 kDa proteinUniRule annotation
Gene namesi
Name:psbIUniRule annotation
Ordered Locus Names:tsr1074
OrganismiThermosynechococcus elongatus (strain BP-1)
Taxonomic identifieri197221 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaSynechococcalesSynechococcaceaeThermosynechococcus
Proteomesi
  • UP000000440 Componenti: Chromosome

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini1 – 5Lumenal1 Publication5
Transmembranei6 – 21Helical1 PublicationAdd BLAST16
Topological domaini22 – 38Cytoplasmic1 PublicationAdd BLAST17

GO - Cellular componenti

Keywords - Cellular componenti

Membrane, Photosystem II, Reaction center, Thylakoid

Pathology & Biotechi

Disruption phenotypei

Decreased yields of PSII dimers with increased PSII monomers, slightly slower photoautotrophic growth, about 20% less oxygen evolution. Formed PSII dimers are stable.1 Publication

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00002196601 – 38Photosystem II reaction center protein IAdd BLAST38

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei1N-formylmethionine2 Publications1

Keywords - PTMi

Formylation

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-48494N.
STRINGi197221.tsr1074.

Structurei

Secondary structure

138
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Helixi2 – 23Combined sources22
Turni24 – 26Combined sources3
Helixi27 – 29Combined sources3
Beta strandi31 – 33Combined sources3

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1S5LX-ray3.50I/i1-38[»]
2AXTX-ray3.00I/i1-38[»]
3KZIX-ray3.60I1-38[»]
4FBYX-ray6.56I/a1-38[»]
4IXQX-ray5.70I/i1-38[»]
4IXRX-ray5.90I/i1-38[»]
4PBUX-ray5.00I/i1-38[»]
4PJ0X-ray2.44I/i1-38[»]
4RVYX-ray5.50I/i1-38[»]
4TNHX-ray4.90I/i1-38[»]
4TNIX-ray4.60I/i1-38[»]
4TNJX-ray4.50I/i1-38[»]
4TNKX-ray5.20I/i1-38[»]
4V62X-ray2.90AI/BI1-38[»]
4V82X-ray3.20AI/BI1-38[»]
5E7CX-ray4.50I/i1-38[»]
5KAFX-ray3.00I/i2-38[»]
5KAIX-ray2.80I/i2-38[»]
5TISX-ray2.25I/i1-38[»]
ProteinModelPortaliQ8DJZ6.
SMRiQ8DJZ6.
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiQ8DJZ6.

Family & Domainsi

Sequence similaritiesi

Belongs to the PsbI family.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

HOGENOMiHOG000252218.
KOiK02710.

Family and domain databases

HAMAPiMF_01316. PSII_PsbI. 1 hit.
InterProiView protein in InterPro
IPR003686. PSII_PsbI.
PfamiView protein in Pfam
PF02532. PsbI. 1 hit.

Sequencei

Sequence statusi: Complete.

Q8DJZ6-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30 
METLKITVYI VVTFFVLLFV FGFLSGDPAR NPKRKDLE
Length:38
Mass (Da):4,405
Last modified:March 1, 2003 - v1
Checksum:i02DDC30594997948
GO

Mass spectrometryi

Molecular mass is 4437±4 Da from positions 1 - 38. Determined by MALDI. 1 Publication
Molecular mass is 4435 Da from positions 1 - 38. Determined by MALDI. 1 Publication

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AB052849 Genomic DNA. Translation: BAB20622.1.
BA000039 Genomic DNA. Translation: BAC08627.1.
RefSeqiNP_681865.1. NC_004113.1.
WP_011056917.1. NC_004113.1.

Genome annotation databases

EnsemblBacteriaiBAC08627; BAC08627; BAC08627.
GeneIDi1012309.
KEGGitel:tsr1074.
PATRICi23927460. VBITheElo119873_1129.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AB052849 Genomic DNA. Translation: BAB20622.1.
BA000039 Genomic DNA. Translation: BAC08627.1.
RefSeqiNP_681865.1. NC_004113.1.
WP_011056917.1. NC_004113.1.

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1S5LX-ray3.50I/i1-38[»]
2AXTX-ray3.00I/i1-38[»]
3KZIX-ray3.60I1-38[»]
4FBYX-ray6.56I/a1-38[»]
4IXQX-ray5.70I/i1-38[»]
4IXRX-ray5.90I/i1-38[»]
4PBUX-ray5.00I/i1-38[»]
4PJ0X-ray2.44I/i1-38[»]
4RVYX-ray5.50I/i1-38[»]
4TNHX-ray4.90I/i1-38[»]
4TNIX-ray4.60I/i1-38[»]
4TNJX-ray4.50I/i1-38[»]
4TNKX-ray5.20I/i1-38[»]
4V62X-ray2.90AI/BI1-38[»]
4V82X-ray3.20AI/BI1-38[»]
5E7CX-ray4.50I/i1-38[»]
5KAFX-ray3.00I/i2-38[»]
5KAIX-ray2.80I/i2-38[»]
5TISX-ray2.25I/i1-38[»]
ProteinModelPortaliQ8DJZ6.
SMRiQ8DJZ6.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

DIPiDIP-48494N.
STRINGi197221.tsr1074.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiBAC08627; BAC08627; BAC08627.
GeneIDi1012309.
KEGGitel:tsr1074.
PATRICi23927460. VBITheElo119873_1129.

Phylogenomic databases

HOGENOMiHOG000252218.
KOiK02710.

Miscellaneous databases

EvolutionaryTraceiQ8DJZ6.

Family and domain databases

HAMAPiMF_01316. PSII_PsbI. 1 hit.
InterProiView protein in InterPro
IPR003686. PSII_PsbI.
PfamiView protein in Pfam
PF02532. PsbI. 1 hit.
ProtoNetiSearch...

Entry informationi

Entry nameiPSBI_THEEB
AccessioniPrimary (citable) accession number: Q8DJZ6
Secondary accession number(s): Q9F1L2
Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 3, 2003
Last sequence update: March 1, 2003
Last modified: March 15, 2017
This is version 90 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

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.