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P07826 (PSBA1_SYNY3) Reviewed, UniProtKB/Swiss-Prot

Last modified July 9, 2014. Version 119. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (2) | 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
Ordered Locus Names:slr1181
OrganismSynechocystis sp. (strain PCC 6803 / Kazusa) [Reference proteome] [HAMAP]
Taxonomic identifier1111708 [NCBI]
Taxonomic lineageBacteriaCyanobacteriaOscillatoriophycideaeChroococcalesSynechocystis

Protein attributes

Sequence length360 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is further processed into a mature form.
Protein existenceEvidence at protein level

General annotation (Comments)

Function

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

Catalytic activity

2 H2O + 2 plastoquinone + 4 light = O2 + 2 plastoquinol. HAMAP-Rule 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 Probable Ref.3.

Miscellaneous

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

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

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-Rule MF_01379
PRO_0000090492
Propeptide345 – 36016 Potential
PRO_0000316428

Regions

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

Sites

Metal binding1701Calcium-manganese-oxide cluster [Ca-4Mn-5O]; calcium By similarity
Metal binding1701Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 1 By similarity
Metal binding1891Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 2 By similarity
Metal binding2151Iron; shared with heterodimeric partner By similarity
Metal binding2721Iron; shared with heterodimeric partner By similarity
Metal binding3321Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 2; via tele nitrogen By similarity
Metal binding3331Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 1 By similarity
Metal binding3331Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 3 By similarity
Metal binding3421Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 2 By similarity
Metal binding3421Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 4 By similarity
Metal binding3441Calcium-manganese-oxide cluster [Ca-4Mn-5O]; calcium; via carboxylate By similarity
Metal binding3441Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 4; via carboxylate By similarity
Site344 – 3452Cleavage; by CtpA By similarity

Experimental info

Sequence conflict901G → A in CAA68778. Ref.1
Sequence conflict1151I → N in CAA68778. Ref.1
Sequence conflict2731F → S in CAA68778. Ref.1

Sequences

Sequence LengthMass (Da)Tools
P07826 [UniParc].

Last modified November 1, 1997. Version 3.
Checksum: 41A74A7819FE90D2

FASTA36039,651
        10         20         30         40         50         60 
MTTTQLGLQE QSLWSRFCCW ITSTSNRLYI GWFGVLMIPT LLTATTCFII AFIAAPPVDI 

        70         80         90        100        110        120 
DGIREPIAGS LLYGNNIITA AVVPSSNAIG LHFYPIWEAH SLDEWLYNGG PYQLIVFHFL 

       130        140        150        160        170        180 
IGIFCYLGRQ WELSYRLGMR PWICVAYSAP VAAATATLLI YSIGQGSFSD GLPLGISGTF 

       190        200        210        220        230        240 
NFMLVLQAEH NVLMHPFHML GVAGVFGGAL FAAMHGSLVT SSLIRETTEV ESQNQGYKFG 

       250        260        270        280        290        300 
QEEETYNIVA AHGYFGRLIF QYASFNNSRA LHFFLGAWPV VGIWFAALAV CCFAFNLNGF 

       310        320        330        340        350        360 
NFNQSILDAQ GRPVSTWADV INRANIGFEV MHERNVHNFP LDLASGDAQM VALNAPAIEG 

« Hide

References

« Hide 'large scale' references
[1]"Nucleotide sequence of a member of the psbA multigene family from the unicellular cyanobacterium Synechocystis 6803."
Osiewacz H.D., McIntosh L.
Nucleic Acids Res. 15:10585-10585(1987) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
[2]"Sequence analysis of the genome of the unicellular cyanobacterium Synechocystis sp. strain PCC6803. II. Sequence determination of the entire genome and assignment of potential protein-coding regions."
Kaneko T., Sato S., Kotani H., Tanaka A., Asamizu E., Nakamura Y., Miyajima N., Hirosawa M., Sugiura M., Sasamoto S., Kimura T., Hosouchi T., Matsuno A., Muraki A., Nakazaki N., Naruo K., Okumura S., Shimpo S. expand/collapse author list , Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Tabata S.
DNA Res. 3:109-136(1996) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: PCC 6803 / Kazusa.
[3]"Thylakoid protein phosphorylation in evolutionally divergent species with oxygenic photosynthesis."
Pursiheimo S., Rintamaeki E., Baena-Gonzalez E., Aro E.-M.
FEBS Lett. 423:178-182(1998) [PubMed] [Europe PMC] [Abstract]
Cited for: SUBCELLULAR LOCATION, LACK OF PHOSPHORYLATION.
Strain: PCC 6803 / Kazusa.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
Y00885 Genomic DNA. Translation: CAA68778.1.
BA000022 Genomic DNA. Translation: BAA18829.1.
PIRF2YB13. S76917.
RefSeqNP_443017.1. NC_000911.1.
YP_005653076.1. NC_017277.1.
YP_007452892.1. NC_020286.1.

3D structure databases

ProteinModelPortalP07826.
SMRP07826. Positions 12-344.
ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

IntActP07826. 2 interactions.
STRING1148.slr1181.

Proteomic databases

PaxDbP07826.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaBAA18829; BAA18829; BAA18829.
GeneID951901.
KEGGsyn:slr1181.
syy:SYNGTS_3123.
syz:MYO_131590.
PATRIC23843888. VBISynSp132158_3474.

Phylogenomic databases

eggNOGNOG04871.
HOGENOMHOG000246913.
KOK02703.
OMAHERNVHN.
OrthoDBEOG6Q2SGP.
PhylomeDBP07826.

Enzyme and pathway databases

BioCycMetaCyc:PSBA1-MONOMER.

Family and domain databases

Gene3D1.20.85.10. 1 hit.
HAMAPMF_01379. PSII_PsbA_D1.
InterProIPR000484. Photo_RC_L/M.
IPR005867. PSII_D1.
[Graphical view]
PfamPF00124. Photo_RC. 1 hit.
[Graphical view]
PRINTSPR00256. REACTNCENTRE.
SUPFAMSSF81483. SSF81483. 1 hit.
TIGRFAMsTIGR01151. psbA. 1 hit.
PROSITEPS00244. REACTION_CENTER. 1 hit.
[Graphical view]
ProtoNetSearch...

Entry information

Entry namePSBA1_SYNY3
AccessionPrimary (citable) accession number: P07826
Secondary accession number(s): P74710
Entry history
Integrated into UniProtKB/Swiss-Prot: August 1, 1988
Last sequence update: November 1, 1997
Last modified: July 9, 2014
This is version 119 of the entry and version 3 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Relevant documents

Synechocystis PCC 6803

Synechocystis (strain PCC 6803): entries and gene names

SIMILARITY comments

Index of protein domains and families