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A3PAU3

- PSBA_PROM0

UniProt

A3PAU3 - PSBA_PROM0

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Protein

Photosystem Q(B) protein

Gene

psbA

Organism
Prochlorococcus marinus (strain MIT 9301)
Status
Reviewed - Annotation score: 4 out of 5- Protein inferred from homologyi

Functioni

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

Catalytic activityi

2 H2O + 2 plastoquinone + 4 light = O2 + 2 plastoquinol.UniRule annotation

Cofactori

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.UniRule annotation

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi171 – 1711Calcium-manganese-oxide cluster [Ca-4Mn-5O]; calciumUniRule annotation
Metal bindingi171 – 1711Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 1UniRule annotation
Metal bindingi190 – 1901Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 2UniRule annotation
Metal bindingi216 – 2161Iron; shared with heterodimeric partnerUniRule annotation
Metal bindingi273 – 2731Iron; shared with heterodimeric partnerUniRule annotation
Metal bindingi333 – 3331Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 2; via tele nitrogenUniRule annotation
Metal bindingi334 – 3341Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 1UniRule annotation
Metal bindingi334 – 3341Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 3UniRule annotation
Metal bindingi343 – 3431Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 2UniRule annotation
Metal bindingi343 – 3431Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 4UniRule annotation
Sitei345 – 3462Cleavage; by CtpAUniRule annotation
Metal bindingi345 – 3451Calcium-manganese-oxide cluster [Ca-4Mn-5O]; calcium; via carboxylateUniRule annotation
Metal bindingi345 – 3451Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 4; via carboxylateUniRule annotation

GO - Molecular functioni

  1. electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activity Source: InterPro
  2. iron ion binding Source: UniProtKB-HAMAP
  3. oxidoreductase activity Source: UniProtKB-KW

GO - Biological processi

  1. photosynthetic electron transport in photosystem II Source: InterPro
  2. response to herbicide Source: UniProtKB-KW
Complete GO annotation...

Keywords - Molecular functioni

Oxidoreductase

Keywords - Biological processi

Electron transport, Herbicide resistance, Photosynthesis, Transport

Keywords - Ligandi

Calcium, Iron, Manganese, Metal-binding

Enzyme and pathway databases

BioCyciPMAR167546:GH1Y-249-MONOMER.

Names & Taxonomyi

Protein namesi
Recommended name:
Photosystem Q(B) proteinUniRule annotation (EC:1.10.3.9UniRule annotation)
Alternative name(s):
32 kDa thylakoid membrane proteinUniRule annotation
Photosystem II protein D1UniRule annotation
Gene namesi
Name:psbAUniRule annotation
Ordered Locus Names:P9301_02451
OrganismiProchlorococcus marinus (strain MIT 9301)
Taxonomic identifieri167546 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaProchloralesProchlorococcaceaeProchlorococcus
ProteomesiUP000001430: Chromosome

Subcellular locationi

Cellular thylakoid membrane UniRule annotation; Multi-pass membrane protein UniRule annotation

GO - Cellular componenti

  1. integral component of membrane Source: UniProtKB-KW
  2. photosystem II Source: UniProtKB-KW
  3. thylakoid membrane Source: UniProtKB-HAMAP
Complete GO annotation...

Keywords - Cellular componenti

Membrane, Photosystem II, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 345345Photosystem Q(B) proteinPRO_0000316357Add
BLAST
Propeptidei346 – 36015UniRule annotationPRO_0000316358Add
BLAST

Interactioni

Subunit structurei

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).By similarity

Protein-protein interaction databases

STRINGi167546.P9301_02451.

Structurei

3D structure databases

ProteinModelPortaliA3PAU3.
SMRiA3PAU3. Positions 15-345.
ModBaseiSearch...
MobiDBiSearch...

Transmembrane

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transmembranei37 – 5721HelicalUniRule annotationAdd
BLAST
Transmembranei110 – 13021HelicalUniRule annotationAdd
BLAST
Transmembranei142 – 16524HelicalUniRule annotationAdd
BLAST
Transmembranei193 – 21927HelicalUniRule annotationAdd
BLAST
Transmembranei270 – 29021HelicalUniRule annotationAdd
BLAST

Family & Domainsi

Sequence similaritiesi

Belongs to the reaction center PufL/M/PsbA/D family.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiNOG04871.
HOGENOMiHOG000246913.
KOiK02703.
OMAiCFTIAFI.
OrthoDBiEOG6Q2SGP.

Family and domain databases

Gene3Di1.20.85.10. 1 hit.
HAMAPiMF_01379. PSII_PsbA_D1.
InterProiIPR000484. Photo_RC_L/M.
IPR005867. PSII_D1.
[Graphical view]
PfamiPF00124. Photo_RC. 1 hit.
[Graphical view]
PRINTSiPR00256. REACTNCENTRE.
SUPFAMiSSF81483. SSF81483. 1 hit.
TIGRFAMsiTIGR01151. psbA. 1 hit.
PROSITEiPS00244. REACTION_CENTER. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

A3PAU3-1 [UniParc]FASTAAdd to Basket

« Hide

        10         20         30         40         50
MTTIQQQRSS LLKGWPQFCE WVTSTNNRIY VGWFGVLMIP CLLTAAACFI
60 70 80 90 100
VAFIAAPPVD IDGIREPVAG SFLYGNNIIS GAVVPSSNAI GLHFYPIWEA
110 120 130 140 150
ATVDEWLYNG GPYQLVIFHF LIGISAYMGR QWELSYRLGM RPWICVAYSA
160 170 180 190 200
PVSAAFAVFL VYPFGQGSFS DGMPLGISGT FNFMFVFQAE HNILMHPFHM
210 220 230 240 250
AGVAGMFGGS LFSAMHGSLV TSSLIRETTE TESQNYGYKF GQEEETYNIV
260 270 280 290 300
AAHGYFGRLI FQYASFNNSR SLHFFLAVFP VVCVWLTSMG ICTMAFNLNG
310 320 330 340 350
FNFNQSVVDA NGKIVPTWGD VLNRANLGME VMHERNAHNF PLDLAAAEST
360
TVALSAPAIG
Length:360
Mass (Da):39,638
Last modified:April 3, 2007 - v1
Checksum:iE8389C98C87541E0
GO

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
CP000576 Genomic DNA. Translation: ABO16868.1.
RefSeqiYP_001090469.1. NC_009091.1.

Genome annotation databases

EnsemblBacteriaiABO16868; ABO16868; P9301_02451.
GeneIDi4911580.
KEGGipmg:P9301_02451.
PATRICi22994075. VBIProMar103344_0241.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
CP000576 Genomic DNA. Translation: ABO16868.1 .
RefSeqi YP_001090469.1. NC_009091.1.

3D structure databases

ProteinModelPortali A3PAU3.
SMRi A3PAU3. Positions 15-345.
ModBasei Search...
MobiDBi Search...

Protein-protein interaction databases

STRINGi 167546.P9301_02451.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

EnsemblBacteriai ABO16868 ; ABO16868 ; P9301_02451 .
GeneIDi 4911580.
KEGGi pmg:P9301_02451.
PATRICi 22994075. VBIProMar103344_0241.

Phylogenomic databases

eggNOGi NOG04871.
HOGENOMi HOG000246913.
KOi K02703.
OMAi CFTIAFI.
OrthoDBi EOG6Q2SGP.

Enzyme and pathway databases

BioCyci PMAR167546:GH1Y-249-MONOMER.

Family and domain databases

Gene3Di 1.20.85.10. 1 hit.
HAMAPi MF_01379. PSII_PsbA_D1.
InterProi IPR000484. Photo_RC_L/M.
IPR005867. PSII_D1.
[Graphical view ]
Pfami PF00124. Photo_RC. 1 hit.
[Graphical view ]
PRINTSi PR00256. REACTNCENTRE.
SUPFAMi SSF81483. SSF81483. 1 hit.
TIGRFAMsi TIGR01151. psbA. 1 hit.
PROSITEi PS00244. REACTION_CENTER. 1 hit.
[Graphical view ]
ProtoNeti Search...

Publicationsi

  1. Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: MIT 9301.

Entry informationi

Entry nameiPSBA_PROM0
AccessioniPrimary (citable) accession number: A3PAU3
Entry historyi
Integrated into UniProtKB/Swiss-Prot: February 5, 2008
Last sequence update: April 3, 2007
Last modified: October 29, 2014
This is version 59 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Miscellaneous

Herbicides such as atrazine, BNT, diuron or ioxynil bind to Q(B) and block electron transport.UniRule annotation
Cyanobacteria usually contain more than 2 copies of the psbA gene.

Keywords - Technical termi

Complete proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3