A0A7U0KRB8 · A0A7U0KRB8_9LAMI
- ProteinCytochrome b559 subunit alpha
- GenepsbE
- StatusUniProtKB unreviewed (TrEMBL)
- Organism
- Amino acids
- Protein existenceInferred from homology
- 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 (PsbF) binds heme. PSII binds additional chlorophylls, carotenoids and specific lipids.
Features
Showing features for binding site.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Binding site | 23 | Fe (UniProtKB | ChEBI) of heme (UniProtKB | ChEBI); ligand shared with beta 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 alpha
- Alternative names
Gene names
Encoded on
- Chloroplast
Organism names
- Organism
- Taxonomic lineageEukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Magnoliopsida > eudicotyledons > Gunneridae > Pentapetalae > asterids > lamiids > Lamiales > Linderniaceae > Torenia
Accessions
- Primary accessionA0A7U0KRB8
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 | 20-44 | 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
Family & Domains
Features
Showing features for domain.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Domain | 6-34 | Photosystem II cytochrome b559 N-terminal | |||
Domain | 42-79 | Photosystem II cytochrome b559 alpha subunit lumenal region | |||
Sequence similarities
Belongs to the PsbE/PsbF family.
Keywords
- Domain
Family and domain databases
Sequence
- Sequence statusComplete
- Length83
- Mass (Da)9,387
- Last updated2021-06-02 v1
- ChecksumF1E3918BCABACDDE
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
MW346665 EMBL· GenBank· DDBJ | QQW49729.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MW307826 EMBL· GenBank· DDBJ | QQY84594.1 EMBL· GenBank· DDBJ | Genomic DNA |