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A2BP21

- PSBA_PROMS

UniProt

A2BP21 - PSBA_PROMS

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Protein

Photosystem Q(B) protein

Gene
psbA1, A9601_02441
psbA2, A9601_12521
Organism
Prochlorococcus marinus (strain AS9601)
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.UniRule annotation

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 By similarity.

Sites

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

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

BioCyciPMAR146891:GH90-1276-MONOMER.
PMAR146891:GH90-247-MONOMER.

Names & Taxonomyi

Protein namesi
Recommended name:
Photosystem Q(B) protein (EC:1.10.3.9)
Alternative name(s):
32 kDa thylakoid membrane protein
Photosystem II protein D1
Gene namesi
Name:psbA1
Ordered Locus Names:A9601_02441
AND
Name:psbA2
Ordered Locus Names:A9601_12521
OrganismiProchlorococcus marinus (strain AS9601)
Taxonomic identifieri146891 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaProchloralesProchlorococcaceaeProchlorococcus
ProteomesiUP000002590: Chromosome

Subcellular locationi

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transmembranei37 – 5721Helical; Reviewed predictionAdd
BLAST
Transmembranei110 – 13021Helical; Reviewed predictionAdd
BLAST
Transmembranei142 – 16524Helical; Reviewed predictionAdd
BLAST
Transmembranei193 – 21927Helical; Reviewed predictionAdd
BLAST
Transmembranei270 – 29021Helical; Reviewed predictionAdd
BLAST

GO - Cellular componenti

  1. integral component of membrane Source: UniProtKB-KW
  2. photosystem II Source: UniProtKB-KW
  3. thylakoid membrane Source: UniProtKB-SubCell

Keywords - Cellular componenti

Membrane, Photosystem II, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 345345Photosystem Q(B) proteinUniRule annotationPRO_0000316355Add
BLAST
Propeptidei346 – 36015 Reviewed predictionPRO_0000316356Add
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.

Protein-protein interaction databases

STRINGi146891.A9601_12521.

Structurei

3D structure databases

ProteinModelPortaliA2BP21.
SMRiA2BP21. Positions 15-345.

Family & Domainsi

Sequence similaritiesi

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.

A2BP21-1 [UniParc]FASTAAdd to Basket

« Hide

MTTIQQQRSS LLKGWPQFCE WVTSTNNRIY VGWFGVLMIP CLLTAAACFI    50
VAFIAAPPVD IDGIREPVAG SFLYGNNIIS GAVVPSSNAI GLHFYPIWEA 100
ATVDEWLYNG GPYQLVIFHF LIGISAYMGR QWELSYRLGM RPWICVAYSA 150
PVSAAFAVFL VYPFGQGSFS DGMPLGISGT FNFMFVFQAE HNILMHPFHM 200
AGVAGMFGGS LFSAMHGSLV TSSLIRETTE TESQNYGYKF GQEEETYNIV 250
AAHGYFGRLI FQYASFNNSR SLHFFLAVFP VVCVWLTSMG ICTMAFNLNG 300
FNFNQSVVDA NGKIVPTWGD VLNRANLGME VMHERNAHNF PLDLAAAEST 350
TVALSAPAIG 360
Length:360
Mass (Da):39,638
Last modified:February 20, 2007 - v1
Checksum:iE8389C98C87541E0
GO

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
CP000551 Genomic DNA. Translation: ABM69532.1.
CP000551 Genomic DNA. Translation: ABM70536.1.
RefSeqiYP_001008639.1. NC_008816.1.
YP_001009643.1. NC_008816.1.

Genome annotation databases

EnsemblBacteriaiABM69532; ABM69532; A9601_02441.
ABM70536; ABM70536; A9601_12521.
GeneIDi4716928.
4717969.
KEGGipmb:A9601_02441.
pmb:A9601_12521.
PATRICi22981935. VBIProMar75723_0244.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
CP000551 Genomic DNA. Translation: ABM69532.1 .
CP000551 Genomic DNA. Translation: ABM70536.1 .
RefSeqi YP_001008639.1. NC_008816.1.
YP_001009643.1. NC_008816.1.

3D structure databases

ProteinModelPortali A2BP21.
SMRi A2BP21. Positions 15-345.
ModBasei Search...
MobiDBi Search...

Protein-protein interaction databases

STRINGi 146891.A9601_12521.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

EnsemblBacteriai ABM69532 ; ABM69532 ; A9601_02441 .
ABM70536 ; ABM70536 ; A9601_12521 .
GeneIDi 4716928.
4717969.
KEGGi pmb:A9601_02441.
pmb:A9601_12521.
PATRICi 22981935. VBIProMar75723_0244.

Phylogenomic databases

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

Enzyme and pathway databases

BioCyci PMAR146891:GH90-1276-MONOMER.
PMAR146891:GH90-247-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: AS9601.

Entry informationi

Entry nameiPSBA_PROMS
AccessioniPrimary (citable) accession number: A2BP21
Entry historyi
Integrated into UniProtKB/Swiss-Prot: February 5, 2008
Last sequence update: February 20, 2007
Last modified: May 14, 2014
This is version 58 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 By similarity.
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

Similar proteinsi