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Protein

Photosystem II reaction center protein M

Gene

psbM

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. This subunit is found at the monomer-monomer interface. Probably involved in dimerization of PSII; at the monomer-monomer interface the only protein-protein contacts observed are between the 2 PsbM subunits. Lipids, chlorophylls and carotenoids contribute strongly to PSII dimerization.UniRule annotation5 Publications

Cofactori

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

GO - Biological processi

Keywordsi

Biological processPhotosynthesis

Enzyme and pathway databases

BioCyciTELO197221:G1G3I-2087-MONOMER

Names & Taxonomyi

Protein namesi
Recommended name:
Photosystem II reaction center protein MUniRule annotation
Short name:
PSII-MUniRule annotation
Gene namesi
Name:psbMUniRule annotation
Ordered Locus Names:tsl2052
OrganismiThermosynechococcus elongatus (strain BP-1)
Taxonomic identifieri197221 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaSynechococcalesSynechococcaceaeThermosynechococcus
Proteomesi
  • UP000000440 Componenti: Chromosome

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini1 – 8Lumenal1 Publication8
Transmembranei9 – 22Helical1 PublicationAdd BLAST14
Topological domaini23 – 36Cytoplasmic1 PublicationAdd BLAST14

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 less stable than wild-type.1 Publication

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00002175851 – 36Photosystem II reaction center protein MAdd BLAST36

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 annotation9 Publications

Protein-protein interaction databases

DIPiDIP-48498N
IntActiQ8DHA7, 1 interactor
STRINGi197221.tsl2052

Structurei

Secondary structure

136
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Helixi7 – 30Combined sources24
Helixi31 – 33Combined sources3

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1S5LX-ray3.50M/m1-36[»]
2AXTX-ray3.00M/m1-36[»]
3KZIX-ray3.60M1-36[»]
4FBYX-ray6.56M/e1-36[»]
4IXQX-ray5.70M/m1-36[»]
4IXRX-ray5.90M/m1-36[»]
4PBUX-ray5.00M/m1-34[»]
4PJ0X-ray2.44M/m1-36[»]
4RVYX-ray5.50M/m1-34[»]
4TNHX-ray4.90M/m1-36[»]
4TNIX-ray4.60M/m1-36[»]
4TNJX-ray4.50M/m1-36[»]
4TNKX-ray5.20M/m1-36[»]
4V62X-ray2.90AM/BM1-36[»]
4V82X-ray3.20AM/BM1-36[»]
5E79X-ray3.50M/m1-34[»]
5E7CX-ray4.50M/m1-34[»]
5KAFX-ray3.00M/m2-36[»]
5KAIX-ray2.80M/m2-36[»]
5MX2X-ray2.20M/m1-36[»]
5TISX-ray2.25M/m1-36[»]
ProteinModelPortaliQ8DHA7
SMRiQ8DHA7
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiQ8DHA7

Family & Domainsi

Sequence similaritiesi

Belongs to the PsbM family.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiENOG4106DDF Bacteria
ENOG410Y5C4 LUCA
HOGENOMiHOG000054399
KOiK02714
OrthoDBiPOG091H13O7

Family and domain databases

HAMAPiMF_00438 PSII_PsbM, 1 hit
InterProiView protein in InterPro
IPR007826 PSII_PsbM
IPR037269 PSII_PsbM_sf
PANTHERiPTHR35774 PTHR35774, 1 hit
PfamiView protein in Pfam
PF05151 PsbM, 1 hit
SUPFAMiSSF161033 SSF161033, 1 hit
TIGRFAMsiTIGR03038 PS_II_psbM, 1 hit

Sequencei

Sequence statusi: Complete.

Q8DHA7-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30 
MEVNQLGLIA TALFVLVPSV FLIILYVQTE SQQKSS
Length:36
Mass (Da):3,981
Last modified:March 1, 2003 - v1
Checksum:iC7CE190547B00AD4
GO

Mass spectrometryi

Molecular mass is 4011±2 Da from positions 1 - 36. Determined by MALDI. 1 Publication
Molecular mass is 4009 Da from positions 1 - 36. Determined by MALDI. 1 Publication

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000039 Genomic DNA Translation: BAC09604.1
RefSeqiNP_682842.1, NC_004113.1
WP_011057887.1, NC_004113.1

Genome annotation databases

EnsemblBacteriaiBAC09604; BAC09604; BAC09604
GeneIDi1011591
KEGGitel:tsl2052

Similar proteinsi

Entry informationi

Entry nameiPSBM_THEEB
AccessioniPrimary (citable) accession number: Q8DHA7
Entry historyiIntegrated into UniProtKB/Swiss-Prot: April 30, 2003
Last sequence update: March 1, 2003
Last modified: April 25, 2018
This is version 96 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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