A0A8F5CBV3 · A0A8F5CBV3_9POAL

Function

function

Component of the cytochrome b6-f complex, which mediates electron transfer between photosystem II (PSII) and photosystem I (PSI), cyclic electron flow around PSI, and state transitions.

Miscellaneous

Heme 1 (or BH or b566) is high-potential and absorbs at about 566 nm, and heme 2 (or BL or b562) is low-potential and absorbs at about 562 nm.

Cofactor

Protein has several cofactor binding sites:
heme b (UniProtKB | Rhea| CHEBI:60344 )

Note: Binds 2 heme b groups non-covalently with two histidine residues as axial ligands.
heme c (UniProtKB | Rhea| CHEBI:61717 )

Note: Binds one heme group covalently by a single cysteine link with no axial amino acid ligand. This heme was named heme ci.

Features

Showing features for binding site.

121520406080100120140160180200
TypeIDPosition(s)Description
Binding site35heme c (UniProtKB | ChEBI); covalent
Binding site86Fe (UniProtKB | ChEBI) of heme b 2 (UniProtKB | ChEBI); axial binding residue
Binding site100Fe (UniProtKB | ChEBI) of heme b 1 (UniProtKB | ChEBI); axial binding residue
Binding site187Fe (UniProtKB | ChEBI) of heme b 2 (UniProtKB | ChEBI); axial binding residue
Binding site202Fe (UniProtKB | ChEBI) of heme b 1 (UniProtKB | ChEBI); axial binding residue

GO annotations

AspectTerm
Cellular Componentchloroplast thylakoid membrane
Molecular Functionelectron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity
Molecular Functionmetal ion binding
Molecular Functionoxidoreductase activity
Biological Processphotosynthesis
Biological Processrespiratory electron transport chain

Keywords

Names & Taxonomy

Protein names

  • Recommended name
    Cytochrome b6

Gene names

    • Name
      petB

Encoded on

  • Chloroplast

Organism names

  • Taxonomic identifier
  • Taxonomic lineage
    Eukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Magnoliopsida > Liliopsida > Poales > Poaceae > BOP clade > Bambusoideae > Arundinarodae > Arundinarieae > Arundinariinae > Chimonobambusa

Accessions

  • Primary accession
    A0A8F5CBV3

Subcellular Location

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

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane32-58Helical
Transmembrane88-106Helical
Transmembrane118-138Helical
Transmembrane184-203Helical

Keywords

Interaction

Subunit

The 4 large subunits of the cytochrome b6-f complex are cytochrome b6, subunit IV (17 kDa polypeptide, PetD), cytochrome f and the Rieske protein, while the 4 small subunits are PetG, PetL, PetM and PetN. The complex functions as a dimer.

Structure

3D structure databases

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain4-215Cytochrome b/b6 N-terminal region profile

Sequence similarities

Belongs to the cytochrome b family. PetB subfamily.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    215
  • Mass (Da)
    24,167
  • Last updated
    2022-01-19 v1
  • Checksum
    9D438F877BD5796C
MSKVYDWFEERLEIQAIADDITSKYVPPHVNIFYCLGGITLTCFLVQVATGFAMTFYYRPTVTEAFSSVQYIMTEANFGWLIRSVHRWSASMMVLMMILHVFRVYLTGGFKKPRELTWVTGVVLGVLTASFGVTGYSLPWDQIGYWAVKIVTGVPEAIPVIGSPLVELLRGSASVGQSTLTRFYSLHTFVLPLLTAVFMLMHFPMIRKQGISGPL

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
MW928533
EMBL· GenBank· DDBJ
QXJ41150.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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