A0A2S1RFY6 · A0A2S1RFY6_9MAGN

  • Protein
    Cytochrome b559 subunit beta
  • Gene
    psbF
  • 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 (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
    • ORF names
      CU650_0058

Encoded on

  • Chloroplast

Organism names

  • Taxonomic identifier
  • Organism
  • Taxonomic lineage
    Eukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Magnoliopsida > Ranunculales > Berberidaceae > Podophylloideae > Podophylleae > Dysosma

Accessions

  • Primary accession
    A0A2S1RFY6

Subcellular Location

Membrane
; Single-pass membrane protein
Plastid, chloroplast thylakoid membrane
; Single-pass membrane protein

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane15-37Helical

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
Domain1-29Photosystem II cytochrome b559 N-terminal

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
    2018-07-18 v1
  • Checksum
    F61251852D7E1D6F
MTIDRTYPIFTVRWLAVHGLAVPTVSFLGSISAMQFIQR

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
MG593045
EMBL· GenBank· DDBJ
AWH98739.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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