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A1E9Q4

- PSBA_SORBI

UniProt

A1E9Q4 - PSBA_SORBI

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Protein

Photosystem Q(B) protein

Gene

psbA

Organism
Sorghum bicolor (Sorghum) (Sorghum vulgare)
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

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: EnsemblPlants/Gramene
  2. iron ion binding Source: UniProtKB-HAMAP
  3. oxidoreductase activity Source: UniProtKB-KW

GO - Biological processi

  1. photosynthetic electron transport in photosystem II Source: EnsemblPlants/Gramene
  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
OrganismiSorghum bicolor (Sorghum) (Sorghum vulgare)
Taxonomic identifieri4558 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaLiliopsidaPoalesPoaceaePACMAD cladePanicoideaeAndropogoneaeSorghum
ProteomesiUP000000768: Chloroplast

Organism-specific databases

GrameneiA1E9Q4.

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_0000340070Add
BLAST
Propeptidei345 – 3539UniRule annotationPRO_0000340071

Amino acid modifications

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Modified residuei2 – 21N-acetylthreonineUniRule annotation
Modified residuei2 – 21PhosphothreonineUniRule annotation

Keywords - PTMi

Acetylation, Phosphoprotein

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

STRINGi4558.Sb01g038505.1.

Structurei

3D structure databases

ProteinModelPortaliA1E9Q4.
SMRiA1E9Q4. 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

eggNOGiNOG04871.
InParanoidiA1E9Q4.
KOiK02703.
OMAiRSGANGW.

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.

A1E9Q4-1 [UniParc]FASTAAdd to Basket

« Hide

        10         20         30         40         50
MTAILERRES TSLWGRFCNW ITSTENRLYI GWFGVLMIPT LLTATSVFII
60 70 80 90 100
AFIAAPPVDI DGIREPVSGS LLYGNNIISG AIIPTSAAIG LHFYPIWEAA
110 120 130 140 150
SVDEWLYNGG PYELIVLHFL LGVACYMGRE WELSFRLGMR PWIAVAYSAP
160 170 180 190 200
VAAATAVFLI YPIGQGSFSD GMPLGISGTF NFMIVFQAEH NILMHPFHML
210 220 230 240 250
GVAGVFGGSL FSAMHGSLVT SSLIRETTEN ESANEGYKFG QEEETYNIVA
260 270 280 290 300
AHGYFGRLIF QYASFNNSRS LHFFLAAWPV VGIWFTALGI STMAFNLNGF
310 320 330 340 350
NFNQSVVDSQ GRVINTWADI INRANLGMEV MHERNAHNFP LDLAALEVPS

LNG
Length:353
Mass (Da):38,935
Last modified:January 23, 2007 - v1
Checksum:iAA6BFB4FBFCE1C79
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
EF115542 Genomic DNA. Translation: ABK79476.1.
RefSeqiYP_899387.1. NC_008602.1.

Genome annotation databases

GeneIDi4549136.
KEGGisbi:SobiCp002.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
EF115542 Genomic DNA. Translation: ABK79476.1 .
RefSeqi YP_899387.1. NC_008602.1.

3D structure databases

ProteinModelPortali A1E9Q4.
SMRi A1E9Q4. Positions 10-344.
ModBasei Search...
MobiDBi Search...

Protein-protein interaction databases

STRINGi 4558.Sb01g038505.1.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

GeneIDi 4549136.
KEGGi sbi:SobiCp002.

Organism-specific databases

Gramenei A1E9Q4.

Phylogenomic databases

eggNOGi NOG04871.
InParanoidi A1E9Q4.
KOi K02703.
OMAi RSGANGW.

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. "Complete chloroplast genome sequences of Hordeum vulgare, Sorghum bicolor and Agrostis stolonifera, and comparative analyses with other grass genomes."
    Saski C., Lee S.-B., Fjellheim S., Guda C., Jansen R.K., Luo H., Tomkins J., Rognli O.A., Daniell H., Clarke J.L.
    Theor. Appl. Genet. 115:571-590(2007) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: cv. BTx623.

Entry informationi

Entry nameiPSBA_SORBI
AccessioniPrimary (citable) accession number: A1E9Q4
Entry historyi
Integrated into UniProtKB/Swiss-Prot: June 10, 2008
Last sequence update: January 23, 2007
Last modified: November 26, 2014
This is version 57 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

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