O49347 · PSBY_ARATH

Function

function

Loosely associated component of the core of photosystem II (PSII), it is not always seen in crystals. PSII is a light-driven water plastoquinone oxidoreductase, using light energy to abstract electrons from H2O, generating a proton gradient subsequently used for ATP formation.

Miscellaneous

The central hydrophobic segment (residues 118-138) does not form a membrane-spanning region but could serve as a targeting signal for processing of the precursor in the thylakoid membrane.

Caution

Was originally thought to be a manganese-binding polypeptide with L-arginine metabolizing activity, with a possible role in the function of the CaMn4O5-cluster in oxygen-evolving PSII (PubMed:9829828).
However it is not essential for PSII activity in cyanobacteria and does not furnish ligands for the CaMn4O5 cluster (By similarity).

GO annotations

all annotationsall molecular functionnucleotide bindingmolecular_functionnucleic acid bindingdna bindingchromatin bindingdna-binding transcription factor activityrna bindingcytoskeletal motor activitycatalytic activitynuclease activitysignaling receptor bindingstructural molecule activitytransporter activitybindingprotein bindingtranslation factor activity, rna bindinglipid bindingkinase activitytransferase activityhydrolase activityoxygen bindingenzyme regulator activitycarbohydrate bindingsignaling receptor activitytranslation regulator activitytranscription regulator activityother molecular functionall biological processcarbohydrate metabolic processgeneration of precursor metabolites and energynucleobase-containing compound metabolic processdna metabolic processtranslationlipid metabolic processtransportresponse to stresscell cyclecell communicationsignal transductioncell-cell signalingmulticellular organism developmentcircadian rhythmbiological_processmetabolic processcatabolic processbiosynthetic processresponse to light stimulusresponse to external stimulustropismresponse to biotic stimulusresponse to abiotic stimulusresponse to endogenous stimulusembryo developmentpost-embryonic developmentfruit ripeningabscissionpollinationflower developmentcellular processprogrammed cell deathphotosynthesiscellular component organizationcell growthprotein metabolic processcellular homeostasissecondary metabolic processreproductive processcell differentiationprotein modification processgrowthepigenetic regulation of gene expressionresponse to chemicalanatomical structure developmentregulation of molecular functionother biological processall cellular componentcellular_componentextracellular regioncell wallintracellular anatomical structurenucleusnuclear envelopenucleoplasmnucleoluscytoplasmmitochondrionlysosomeendosomevacuoleperoxisomeendoplasmic reticulumgolgi apparatuscytosolribosomecytoskeletonplasma membranechloroplastplastidthylakoidmembraneexternal encapsulating structureother cellular component
Cell color indicative of number of GO terms
AspectTerm
Cellular Componentchloroplast stromal thylakoid
Cellular Componentchloroplast thylakoid membrane
Cellular Componentphotosystem II
Molecular Functionmanganese ion binding
Biological Processcell redox homeostasis
Biological Processphotoinhibition
Biological Processphotosynthesis

Keywords

Enzyme and pathway databases

Protein family/group databases

Names & Taxonomy

Protein names

Gene names

    • Name
      PSBY
    • ORF names
      F12A21.13
    • Ordered locus names
      At1g67740

Organism names

  • Taxonomic identifier
  • Strain
    • cv. Columbia
  • Taxonomic lineage
    Eukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Magnoliopsida > eudicotyledons > Gunneridae > Pentapetalae > rosids > malvids > Brassicales > Brassicaceae > Camelineae > Arabidopsis

Accessions

  • Primary accession
    O49347

Proteomes

Organism-specific databases

Genome annotation databases

Subcellular Location

Plastid, chloroplast thylakoid membrane
; Multi-pass membrane protein
Note: Imports into spinach thylakoid membranes.

Features

Showing features for topological domain, transmembrane.

TypeIDPosition(s)Description
Topological domain75-83Lumenal
Transmembrane84-104Helical
Topological domain105-117Stromal
Transmembrane118-138Helical
Topological domain139-157Lumenal
Transmembrane158-178Helical
Topological domain179-189Stromal

Keywords

PTM/Processing

Features

Showing features for transit peptide, chain, propeptide.

TypeIDPosition(s)Description
Transit peptide1-74Chloroplast
ChainPRO_000002961075-117Photosystem II reaction center protein PsbY-1, chloroplastic
PropeptidePRO_0000029611118-143
ChainPRO_0000029612144-189Photosystem II reaction center protein PsbY-2, chloroplastic

Proteomic databases

PTM databases

Expression

Gene expression databases

Interaction

Protein-protein interaction databases

Structure

Family & Domains

Features

Showing features for region, compositional bias.

TypeIDPosition(s)Description
Region1-24Disordered
Compositional bias10-24Polar residues

Sequence similarities

Belongs to the PsbY family.

Keywords

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Sequence processing
    The displayed sequence is further processed into a mature form.
  • Length
    189
  • Mass (Da)
    19,465
  • Last updated
    1998-06-01 v1
  • Checksum
    3D71B983156B1D8D
MAAAMATATKCMSLNPSPPKLQNQTKSKPFISLPTPPKPNVSLAVTSTALAGAVFSSLSYSEPALAIQQIAQLAAANASSDNRGLALLLPIVPAIAWVLYNILQPAINQVNKMRESKGIVVGLGIGGGLAASGLLTPPPEAYAAAEAAAASSDSRGQLLLIVVTPALLWVLYNILQPALNQINKMRSGD

Features

Showing features for compositional bias.

TypeIDPosition(s)Description
Compositional bias10-24Polar residues

Keywords

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
AJ223306
EMBL· GenBank· DDBJ
CAA11248.1
EMBL· GenBank· DDBJ
mRNA
AF079800
EMBL· GenBank· DDBJ
AAC95011.1
EMBL· GenBank· DDBJ
mRNA
AC008113
EMBL· GenBank· DDBJ
AAG28890.1
EMBL· GenBank· DDBJ
Genomic DNA
CP002684
EMBL· GenBank· DDBJ
AEE34689.1
EMBL· GenBank· DDBJ
Genomic DNA
AY050391
EMBL· GenBank· DDBJ
AAK91408.1
EMBL· GenBank· DDBJ
mRNA
AY052269
EMBL· GenBank· DDBJ
AAK97739.1
EMBL· GenBank· DDBJ
mRNA
AY097348
EMBL· GenBank· DDBJ
AAM19864.1
EMBL· GenBank· DDBJ
mRNA

Genome annotation databases

Similar Proteins

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