V5V471 · V5V471_9CYAN

Function

function

This b-type cytochrome is tightly associated with the reaction center of photosystem II (PSII). PSII is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H2O, generating O2 and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation.

Cofactor

heme b (UniProtKB | Rhea| CHEBI:60344 )

Note: With its partner (PsbF) binds heme. PSII binds additional chlorophylls, carotenoids and specific lipids.

Features

Showing features for binding site.

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MAGTTGERPFSDIITSVRYWVIHSITIPALFIAGWLFVSTGLAYDVFGTPRPDSYYAQEQRSIPLVTDRFEAKQQVETFLEELK
TypeIDPosition(s)Description
Binding site23Fe (UniProtKB | ChEBI) of heme (UniProtKB | ChEBI); ligand shared with beta subunit; axial binding residue

GO annotations

all annotationsall molecular functionvirus receptor activitydna bindingrna bindingcytoskeletal motor activitycatalytic activitygtpase activitystructural molecule activitytransporter activitycytoskeletal protein bindinglipid bindingcyclase activityantioxidant activityoxidoreductase activitytransferase activityhydrolase activitylyase activityisomerase activityligase activityprotein tag activitycargo receptor activityhistone bindingprotein folding chaperonetranslation regulator activitynutrient reservoir activityreceptor ligand activitymolecular transducer activitymolecular adaptor activitytoxin activitycell adhesion mediator activitymolecular function regulator activityvirus coreceptor activitycatalytic activity, acting on a proteincatalytic activity, acting on dnacatalytic activity, acting on rnamolecular carrier activitytranscription regulator activitygeneral transcription initiation factor activitymolecular sensor activitymolecular sequestering activityatp-dependent activityother molecular functionall biological processmitotic cell cyclecytokinesiscytoplasmic translationimmune system processmuscle system processcirculatory system processrenal system processrespiratory system processcarbohydrate metabolic processgeneration of precursor metabolites and energydna replicationdna repairdna recombinationchromatin organizationdna-templated transcriptionregulation of dna-templated transcriptiontrna metabolic processprotein foldingprotein glycosylationamino acid metabolic processmodified amino acid metabolic processlipid metabolic processvitamin metabolic processsulfur compound metabolic processintracellular protein transportnucleocytoplasmic transportautophagyinflammatory responsemitochondrion organizationcytoskeleton organizationmicrotubule-based movementperoxisome organizationlysosome organizationchromosome segregationcell adhesionestablishment or maintenance of cell polarityprogrammed cell deathphotosynthesismrna metabolic processsnrna metabolic processvesicle-mediated transportreproductive processdigestive system processsignalingcell differentiationprotein catabolic processextracellular matrix organizationregulatory ncrna-mediated gene silencingtelomere organizationcell junction organizationwound healingribosome biogenesiscilium organizationanatomical structure developmentcell motilitynervous system processendocrine processprotein maturationtransmembrane transportnucleobase-containing small molecule metabolic processhepaticobiliary system processmembrane organizationprotein-containing complex assemblycell wall organization or biogenesisnitrogen cycle metabolic processprotein localization to plasma membranedefense response to other organismdetoxificationmeiotic nuclear divisionmitotic nuclear divisionmitochondrial gene expressioncarbohydrate derivative metabolic processother biological processall cellular componentnuclear chromosomeextracellular regionextracellular spacecell wallnucleusnuclear envelopenucleoplasmchromosomenucleolusmitochondrionlysosomeendosomevacuoleperoxisomeendoplasmic reticulumgolgi apparatuslipid dropletmicrotubule organizing centercytosolribosomecytoskeletonplasma membraneciliumplastidthylakoidexternal encapsulating structureextracellular matrixcytoplasmic vesicleorganelleother cellular component
Cell color indicative of number of GO terms
AspectTerm
Cellular Componentphotosystem II reaction center
Cellular Componentplasma membrane-derived thylakoid membrane
Molecular Functionelectron transfer activity
Molecular Functionheme binding
Molecular Functioniron ion binding
Molecular Functionoxidoreductase activity
Biological Processphotosynthetic electron transport chain

Keywords

Names & Taxonomy

Protein names

  • Recommended name
    Cytochrome b559 subunit alpha
  • Alternative names
    • PSII reaction center subunit V

Gene names

    • Name
      psbE
    • ORF names
      NK55_04340

Organism names

  • Taxonomic identifier
  • Strain
    • NK55
  • Taxonomic lineage
    Bacteria > Cyanobacteriota > Cyanophyceae > Acaryochloridales > Thermosynechococcaceae > Thermosynechococcus

Accessions

  • Primary accession
    V5V471

Proteomes

Subcellular Location

Cellular thylakoid membrane
; Single-pass membrane protein
Membrane
; Single-pass membrane protein

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane20-44Helical

Keywords

Interaction

Subunit

Heterodimer of an alpha subunit and a beta subunit.
Heterodimer of an alpha subunit and beta subunit. PSII is composed of 1 copy each of membrane proteins PsbA, PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK, PsbL, PsbM, PsbT, PsbX, PsbY, PsbZ, Psb30/Ycf12, peripheral proteins PsbO, CyanoQ (PsbQ), PsbU, PsbV and a large number of cofactors. It forms dimeric complexes.

Protein-protein interaction databases

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain6-34Photosystem II cytochrome b559 N-terminal
Domain42-79Photosystem II cytochrome b559 alpha subunit lumenal region

Sequence similarities

Belongs to the PsbE/PsbF family.

Keywords

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    84
  • Mass (Da)
    9,574
  • Last updated
    2014-02-19 v1
  • Checksum
    19C7BDB4624D937F
MAGTTGERPFSDIITSVRYWVIHSITIPALFIAGWLFVSTGLAYDVFGTPRPDSYYAQEQRSIPLVTDRFEAKQQVETFLEELK

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
CP006735
EMBL· GenBank· DDBJ
AHB88193.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

Disclaimer

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