A6MVV4 · A6MVV4_RHDSA
- ProteinCytochrome b559 subunit beta
- GenepsbF
- StatusUniProtKB unreviewed (TrEMBL)
- Amino acids
- Protein existenceEvidence at protein level
- Annotation score3/5
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
Note: With its partner (PsbE) binds heme. PSII binds additional chlorophylls, carotenoids and specific lipids.
Features
Showing features for binding site.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Binding site | 21 | Fe (UniProtKB | ChEBI) of heme (UniProtKB | ChEBI); ligand shared with alpha subunit; axial binding residue | |||
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | chloroplast thylakoid membrane | |
Cellular Component | photosystem II reaction center | |
Molecular Function | electron transfer activity | |
Molecular Function | heme binding | |
Molecular Function | iron ion binding | |
Biological Process | photosynthetic electron transport chain |
Keywords
- Biological process
- Ligand
Names & Taxonomy
Protein names
- Recommended nameCytochrome b559 subunit beta
- Alternative names
Gene names
Encoded on
- Chloroplast
Organism names
- Strain
- Taxonomic lineageEukaryota > Cryptophyceae > Pyrenomonadales > Pyrenomonadaceae > Rhodomonas
Accessions
- Primary accessionA6MVV4
Subcellular Location
UniProt Annotation
GO Annotation
Membrane ; Single-pass membrane protein
Plastid, chloroplast thylakoid membrane ; Single-pass membrane protein
Features
Showing features for transmembrane.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Transmembrane | 20-40 | Helical | |||
Keywords
- Cellular component
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
Sequence
- Sequence statusComplete
- Length42
- Mass (Da)4,856
- Last updated2007-07-24 v1
- ChecksumCF1A0CCACE151215
Keywords
- Technical term
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
EF508371 EMBL· GenBank· DDBJ | ABO70828.1 EMBL· GenBank· DDBJ | Genomic DNA |