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A0T0G9

- PSBA_PHATC

UniProt

A0T0G9 - PSBA_PHATC

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Protein

Photosystem Q(B) protein

Gene

psbA

Organism
Phaeodactylum tricornutum (strain CCAP 1055/1)
Status
Reviewed - Annotation score: 3 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

Note: 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 bindingi170 – 1701Calcium-manganese-oxide cluster [Ca-4Mn-5O]; calciumUniRule annotation
Metal bindingi170 – 1701Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 1UniRule annotation
Metal bindingi189 – 1891Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 2UniRule annotation
Metal bindingi215 – 2151Iron; shared with heterodimeric partnerUniRule annotation
Metal bindingi272 – 2721Iron; shared with heterodimeric partnerUniRule annotation
Metal bindingi332 – 3321Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 2; via tele nitrogenUniRule annotation
Metal bindingi333 – 3331Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 1UniRule annotation
Metal bindingi333 – 3331Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 3UniRule annotation
Metal bindingi342 – 3421Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 2UniRule annotation
Metal bindingi342 – 3421Calcium-manganese-oxide cluster [Ca-4Mn-5O]; manganese 4UniRule annotation
Sitei344 – 3452Cleavage; by ctpABy similarity
Metal bindingi344 – 3441Calcium-manganese-oxide cluster [Ca-4Mn-5O]; calcium; via carboxylateUniRule annotation
Metal bindingi344 – 3441Calcium-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

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
Encoded oniPlastid; Chloroplast
OrganismiPhaeodactylum tricornutum (strain CCAP 1055/1)
Taxonomic identifieri556484 [NCBI]
Taxonomic lineageiEukaryotaStramenopilesBacillariophytaBacillariophyceaeBacillariophycidaeNaviculalesPhaeodactylaceaePhaeodactylum
ProteomesiUP000000759: Chloroplast

Subcellular locationi

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

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transmembranei36 – 5621HelicalUniRule annotationAdd
BLAST
Transmembranei109 – 12921HelicalUniRule annotationAdd
BLAST
Transmembranei141 – 16424HelicalUniRule annotationAdd
BLAST
Transmembranei192 – 21827HelicalUniRule annotationAdd
BLAST
Transmembranei269 – 28921HelicalUniRule annotationAdd
BLAST

GO - Cellular componenti

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

Keywords - Cellular componenti

Chloroplast, Membrane, Photosystem II, Plastid, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 344344Photosystem Q(B) proteinPRO_0000316519Add
BLAST
Propeptidei345 – 36016UniRule annotationPRO_0000316520Add
BLAST

Proteomic databases

PRIDEiA0T0G9.

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

Structurei

3D structure databases

ProteinModelPortaliA0T0G9.
SMRiA0T0G9. Positions 10-344.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

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

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

InParanoidiA0T0G9.

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.

A0T0G9-1 [UniParc]FASTAAdd to Basket

« Hide

        10         20         30         40         50
MTATLERRQS VSLWERFCGW ITSTENRLYI GWFGCLMFPT LLTATSCYII
60 70 80 90 100
AFIAAPPVDI DGIREPVAGS LLYGNNIITG AVIPSSNAIG IHFYPIWEAA
110 120 130 140 150
SVDEWLYNGG PYQLIVLHFL LGVASYMGRE WELSYRLGMR PWIFVAFSAP
160 170 180 190 200
VAAASAVFLV YPIGQGSFSD GMPLGISGTF NFMLVFQAEH NILMHPFHMA
210 220 230 240 250
GVAGVFGGSL FSAMHGSLVT SSLIRETTEN ESTNYGYKFG QEEETYNIVA
260 270 280 290 300
AHGYFGRLIF QYASFNNSRA LHFFLALWPV VGIWLTAMGV STMAFNLNGF
310 320 330 340 350
NFNQSVVDSQ GRVINTWADI INRADLGMEV MHERNAHNFP LDLASGEVLP
360
VALTAPAVNG
Length:360
Mass (Da):39,651
Last modified:January 9, 2007 - v1
Checksum:i585F1055DF8EF7CE
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
EF067920 Genomic DNA. Translation: ABK20667.1.
RefSeqiYP_874444.1. NC_008588.1.

Genome annotation databases

GeneIDi4524567.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
EF067920 Genomic DNA. Translation: ABK20667.1 .
RefSeqi YP_874444.1. NC_008588.1.

3D structure databases

ProteinModelPortali A0T0G9.
SMRi A0T0G9. Positions 10-344.
ModBasei Search...
MobiDBi Search...

Proteomic databases

PRIDEi A0T0G9.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

GeneIDi 4524567.

Phylogenomic databases

InParanoidi A0T0G9.

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. "Chloroplast genomes of the diatoms Phaeodactylum tricornutum and Thalassiosira pseudonana: comparison with other plastid genomes of the red lineage."
    Oudot-Le Secq M.-P., Grimwood J., Shapiro H., Armbrust E.V., Bowler C., Green B.R.
    Mol. Genet. Genomics 277:427-439(2007) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: CCAP 1055/1.

Entry informationi

Entry nameiPSBA_PHATC
AccessioniPrimary (citable) accession number: A0T0G9
Entry historyi
Integrated into UniProtKB/Swiss-Prot: February 5, 2008
Last sequence update: January 9, 2007
Last modified: November 26, 2014
This is version 54 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)

Miscellaneousi

Miscellaneous

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

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3