HAMAP rule MF_00642
General rule information
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| Accession | MF_00642 |
| Dates | 26-MAY-2003 (Created)
20-JUN-2023 (Last updated, Version 49) |
| Name | PSII_PsbE |
| Scope(s) |
Bacteria Cyanobacteriota Plastid |
| Template(s) | P69383 (PSBE_SPIOL); P09190 (PSBE_SYNY3); Q8DIP0 (PSBE_THEVB); P12238 (PSBE_THEVL); [ Recover all ] |
| Triggered by |
HAMAP; MF_00642 (Get profile general information and statistics) |
Propagated annotation
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Identifier, protein and gene names
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| Identifier | PSBE |
| Protein name | RecName: Full=Cytochrome b559 subunit alpha; AltName: Full=PSII reaction center subunit V; |
| Gene name | Name=psbE; |
Comments
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| 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 H(2)O, generating O(2) 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 | Name=heme b; Xref=ChEBI:CHEBI:60344; Note=With its partner (PsbF) binds heme. PSII binds additional chlorophylls, carotenoids and specific lipids.; |
| case <OC:Cyanobacteriota> | |
| SUBUNIT | Heterodimer of an alpha subunit and 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, peripheral proteins PsbO, CyanoQ (PsbQ), PsbU, PsbV and a large number of cofactors. It forms dimeric complexes. |
| else | |
| 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. |
| end case | |
| case <OG:Chloroplast> | |
| SUBCELLULAR LOCATION | Plastid, chloroplast thylakoid membrane; Single- pass membrane protein. |
| else case <OC:Gloeobacter> | |
| SUBCELLULAR LOCATION | Cell inner membrane; Single-pass membrane protein. |
| else | |
| SUBCELLULAR LOCATION | Cellular thylakoid membrane; Single-pass membrane protein. |
| end case | |
| SIMILARITY | Belongs to the PsbE/PsbF family. |
Keywords
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| Photosynthesis | |
| Photosystem II | |
| Heme | |
| Iron | |
| Metal-binding | |
| Transport | |
| Electron transport | |
| case <OC:Gloeobacter> | |
| Cell membrane | |
| Cell inner membrane | |
| else | |
| Thylakoid | |
| end case | |
| Membrane | |
| Transmembrane | |
| Transmembrane helix | |
Gene Ontology
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| GO:0009055; Molecular function:electron transfer activity | |
| GO:0005506; Molecular function:iron ion binding | |
| GO:0015979; Biological process:photosynthesis | |
| case <OG:Chloroplast> | |
| GO:0009535; Cellular component:chloroplast thylakoid membrane | |
| else case <OCellular component:Gloeobacter> | |
| GO:0005886; Cellular component:plasma membrane | |
| else; https://www.ebi.ac.uk/QuickGO/term/else | |
| GO:0042651; Cellular component:thylakoid membrane | |
| end case | |
Cross-references
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| Pfam | PF00283; Cytochrom_B559; 1; |
| Pfam | PF00284; Cytochrom_B559a; 1; |
| PIRSF | PIRSF000036; PsbE; 1; |
| NCBIfam | TIGR01332; Cyt_b559_alpha; 1; |
| PROSITE | PS00537; CYTOCHROME_B559; 1; |
Features
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| From: PSBE_THEVL (P12238) | ||||||||||||
| Key | From | To | Description | Tag | Condition | FTGroup | ||||||
| TRANSMEM | 21 | 35 | /note="Helical" | |||||||||
| BINDING | 23 | 23 | /ligand="heme" /ligand_id="ChEBI:CHEBI:30413" /ligand_note="ligand shared with beta subunit" /ligand_part="Fe" /ligand_part_id="ChEBI:CHEBI:18248" /note="axial binding residue" |
H | ||||||||
Additional information
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| Size range | 73-84 amino acids |
| Related rules |
MF_00643 |
| Fusion | Nter: None Cter: None |