Q7J1C2 · PSBF_ASACA

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 (PsbE) binds heme. PSII binds additional chlorophylls, carotenoids and specific lipids.

Features

Showing features for binding site.

1395101520253035
MTIDRTYPIFTVRWLAVHGLAVPTVSFLGSISAMQFIQR
TypeIDPosition(s)Description
Binding site18Fe (UniProtKB | ChEBI) of heme (UniProtKB | ChEBI); ligand shared with alpha 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 beta
  • Alternative names
    • PSII reaction center subunit VI

Gene names

    • Name
      psbF

Encoded on

  • Chloroplast

Organism names

  • Taxonomic identifier
  • Taxonomic lineage
    Eukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Magnoliopsida > Magnoliidae > Piperales > Asaraceae > Asarum

Accessions

  • Primary accession
    Q7J1C2

Subcellular Location

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane14-30Helical

Keywords

PTM/Processing

Features

Showing features for chain.

TypeIDPosition(s)Description
ChainPRO_00002003571-39Cytochrome b559 subunit beta

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.

Structure

Family & Domains

Sequence similarities

Belongs to the PsbE/PsbF family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    39
  • Mass (Da)
    4,424
  • Last updated
    2004-07-05 v1
  • Checksum
    F61251852D7E1D6F
MTIDRTYPIFTVRWLAVHGLAVPTVSFLGSISAMQFIQR

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
AF123829
EMBL· GenBank· DDBJ
AAG26195.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. Our staff consists of biologists and biochemists that are not trained to give medical advice.
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