A0A2Z4M9H2 · A0A2Z4M9H2_9CHLO

  • Protein
    Cytochrome b559 subunit alpha
  • Gene
    psbE
  • Status
    UniProtKB unreviewed (TrEMBL)
  • Amino acids
  • Protein existence
    Inferred from homology
  • Annotation score
    3/5

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.

1831020304050607080
MAGITGERPFSDILTSIRYWVIHSITIPSLFIAGWLFVSTGLAYDVFGTPRPNEYFTEQRQETPLITNRFNALDQVKKLSDVS
TypeIDPosition(s)Description
Binding site23Fe (UniProtKB | ChEBI) of heme (UniProtKB | ChEBI); ligand shared with beta subunit; axial binding residue

GO annotations

AspectTerm
Cellular Componentchloroplast thylakoid membrane
Cellular Componentphotosystem II reaction center
Molecular Functionelectron transfer activity
Molecular Functionheme binding
Molecular Functioniron ion binding
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

Encoded on

  • Chloroplast

Organism names

  • Taxonomic identifier
  • Organism
  • Taxonomic lineage
    Eukaryota > Viridiplantae > Chlorophyta > Ulvophyceae > OUU clade > Ulvales > Ulvaceae > Blidingia

Accessions

  • Primary accession
    A0A2Z4M9H2

Subcellular Location

Membrane
; Single-pass membrane protein
Plastid, chloroplast thylakoid 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. 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, at least 3 peripheral proteins of the oxygen-evolving complex and a large number of cofactors. It forms dimeric complexes.

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

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    83
  • Mass (Da)
    9,439
  • Last updated
    2018-10-10 v1
  • Checksum
    A5787B9D019838F3
MAGITGERPFSDILTSIRYWVIHSITIPSLFIAGWLFVSTGLAYDVFGTPRPNEYFTEQRQETPLITNRFNALDQVKKLSDVS

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
MG721590
EMBL· GenBank· DDBJ
AWX53146.1
EMBL· GenBank· DDBJ
Genomic DNA
MT948112
EMBL· GenBank· DDBJ
QPF96249.1
EMBL· GenBank· DDBJ
Genomic DNA
MK408749
EMBL· GenBank· DDBJ
QUX32842.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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