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P0A445 (PSBA1_SYNEN) Reviewed, UniProtKB/Swiss-Prot

Last modified October 19, 2011. Version 47. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (1) | Third-party data text xml rdf/xml gff fasta
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Names and origin

Protein namesRecommended name:
Photosystem Q(B) protein 1
EC=1.10.3.9
Alternative name(s):
32 kDa thylakoid membrane protein 1
Photosystem II protein D1 1
Gene names
Name:psbA1
Synonyms:psbA-1
OrganismSynechococcus elongatus naegeli
Taxonomic identifier1141 [NCBI]
Taxonomic lineageBacteria › Cyanobacteria › Chroococcales › Synechococcus

Protein attributes

Sequence length360 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is further processed into a mature form.
Protein existenceInferred from homology

General annotation (Comments)

Function

This is one of the two reaction center proteins of photosystem II By similarity. HAMAP MF_01379

Catalytic activity

2 H2O + 2 plastoquinone + 4 light = O2 + 2 plastoquinol. HAMAP MF_01379

Cofactor

The psbA/B heterodimer binds P680, the primary electron donor of PSII. It shares a non-heme iron and each subunit binds additional chlorophylls and pheophytin. PsbA provides most of the ligands for the Mn-cluster of the oxygen-evolving complex By similarity.

Subunit structure

The psbA/B heterodimer binds the P680 chlorophylls and subsequent electron acceptors. PSII consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation. PSII forms dimeric complexes By similarity.

Subcellular location

Cellular thylakoid membrane; Multi-pass membrane protein By similarity HAMAP MF_01379.

Miscellaneous

Herbicides such as atrazine, BNT, diuron or ioxynil bind to Q(B) and block electron transport By similarity. HAMAP MF_01379

Cyanobacteria usually contain more than 2 copies of the psbA gene. HAMAP MF_01379

Sequence similarities

Belongs to the reaction center pufL/M/psbA/D family.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 344344Photosystem Q(B) protein 1 HAMAP MF_01379
PRO_0000090486
Propeptide345 – 36016 Potential
PRO_0000316378

Regions

Transmembrane36 – 5621Helical; Potential
Transmembrane109 – 12921Helical; Potential
Transmembrane141 – 16424Helical; Potential
Transmembrane192 – 21827Helical; Potential
Transmembrane269 – 28921Helical; Potential

Sites

Metal binding2151Iron; shared with heterodimeric partner By similarity
Metal binding2721Iron; shared with heterodimeric partner By similarity
Site344 – 3452Cleavage; by CtpA By similarity

Experimental info

Sequence conflict1341S → T in CAA78895. Ref.2

Sequences

Sequence LengthMass (Da)Tools
P0A445 [UniParc].

Last modified March 15, 2005. Version 1.
Checksum: D4B45833FA46A4D4

FASTA36039,737
        10         20         30         40         50         60 
MTTTLQRRES ANLWERFCNW VTSTDNRLYV GWFGVIMIPT LLAATICFVI AFIAAPPVDI 

        70         80         90        100        110        120 
DGIREPVSGS LLYGNNIITG AVVPSSNAIG LHFYPIWEAA SLDEWLYNGG PYQLIIFHFL 

       130        140        150        160        170        180 
LGASCYMGRQ WELSYRLGMR PWICVAYSAP LASAFAVFLI YPIGQGSFSD GMPLGISGTF 

       190        200        210        220        230        240 
NFMIVFQAEH NILMHPFHQL GVAGVFGGAL FCAMHGSLVT SSLIRETTET ESANYGYKFG 

       250        260        270        280        290        300 
QEEETYNIVA AHGYFGRLIF QYASFNNSRS LHFFLAAWPV VGVWFTALGI STMAFNLNGF 

       310        320        330        340        350        360 
NFNHSVIDAK GNVINTWADI INRANLGMEV MHERNAHNFP LDLASAESAP VAMIAPSING

« Hide

References

[1]"The two psbA genes from the thermophilic cyanobacterium Synechococcus elongatus."
Motoki A., Shimazu T., Hirano M., Katoh S.
Plant Physiol. 108:1305-1306(1995) [PubMed: 7630952] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
[2]"Complete sequence of one copy of the psbA gene from the thermophilic cyanobacterium Synechococcus elongatus."
Kloos R., Stevens E., Oettmeier W.
Z. Naturforsch. C 48:799-802(1993) [PubMed: 8251037] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
+Additional computationally mapped references.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ		D14325 Genomic DNA. Translation: BAA03263.1.
Z16081 Genomic DNA. Translation: CAA78895.1.
PIRS26586.

3D structure databases

ProteinModelPortalP0A445.
SMRP0A445. Positions 10-344.
ModBaseSearch...

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Family and domain databases

HAMAPMF_01379. PSII_PsbA_D1.
[Tree]
InterProIPR000484. Photo_RC_L/M.
IPR005867. PSII_PsbA/D1.
[Graphical view]
Gene3DG3DSA:1.20.85.10. Photo_RC_L/M. 1 hit.
PfamPF00124. Photo_RC. 1 hit.
[Graphical view]
SUPFAMSSF81483. Photo_RC_L/M. 1 hit.
TIGRFAMsTIGR01151. PsbA. 1 hit.
PROSITEPS00244. REACTION_CENTER. 1 hit.
[Graphical view]
ProtoNetSearch...

Entry information

Entry namePSBA1_SYNEN
AccessionPrimary (citable) accession number: P0A445
Secondary accession number(s): P35876
Entry history
Integrated into UniProtKB/Swiss-Prot: March 15, 2005
Last sequence update: March 15, 2005
Last modified: October 19, 2011
This is version 47 of the entry and version 1 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Relevant documents

SIMILARITY comments

Index of protein domains and families

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