A0A6H1XEI7 · A0A6H1XEI7_9ROSA

  • Protein
    Cytochrome b6
  • Gene
    petB
  • Status
    UniProtKB unreviewed (TrEMBL)
  • Amino acids
  • Protein existence
    Inferred from homology
  • Annotation score
    3/5

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
  • Organism
  • Taxonomic lineage
    Eukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Magnoliopsida > eudicotyledons > Gunneridae > Pentapetalae > rosids > fabids > Rosales > Rosaceae > Amygdaloideae > Amygdaleae > Prunus

Accessions

  • Primary accession
    A0A6H1XEI7

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.

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)
    24,121
  • Last updated
    2020-08-12 v1
  • Checksum
    3546FD5A74FFE3FF
MSKIYDWFEERLEIQAIADDITSKYVPPHVNIFYCLGGITLTCFLVQVATGFAMTFYYRPTVTEAFASVQYIMTEANFGWLIRSVHRWSASMMVLMMILHVFRVYLTGGFKKPRELTWVTGVVLGVLTASFGVTGYSLPRDQIGYWAVKIVTGVPDAIPVIGSPLVELLRGSASVGQSTLTRFYSLHTFVLPLLTAVFMLMHFPMIRKQGISGPL

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
MH700952
EMBL· GenBank· DDBJ
QJA14012.1
EMBL· GenBank· DDBJ
Genomic DNA
MW406457
EMBL· GenBank· DDBJ
QWK45323.1
EMBL· GenBank· DDBJ
Genomic DNA
MW406458
EMBL· GenBank· DDBJ
QWK45408.1
EMBL· GenBank· DDBJ
Genomic DNA
MW406459
EMBL· GenBank· DDBJ
QWK45493.1
EMBL· GenBank· DDBJ
Genomic DNA
MW406460
EMBL· GenBank· DDBJ
QWK45578.1
EMBL· GenBank· DDBJ
Genomic DNA
MW406461
EMBL· GenBank· DDBJ
QWK45663.1
EMBL· GenBank· DDBJ
Genomic DNA
MW406462
EMBL· GenBank· DDBJ
QWK45748.1
EMBL· GenBank· DDBJ
Genomic DNA
MW406465
EMBL· GenBank· DDBJ
QWK46003.1
EMBL· GenBank· DDBJ
Genomic DNA
MW406466
EMBL· GenBank· DDBJ
QWK46088.1
EMBL· GenBank· DDBJ
Genomic DNA
MW406467
EMBL· GenBank· DDBJ
QWK46173.1
EMBL· GenBank· DDBJ
Genomic DNA
MW406468
EMBL· GenBank· DDBJ
QWK46258.1
EMBL· GenBank· DDBJ
Genomic DNA
MW406469
EMBL· GenBank· DDBJ
QWK46343.1
EMBL· GenBank· DDBJ
Genomic DNA
MW406472
EMBL· GenBank· DDBJ
QWK46598.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

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