AC MF_00643; DC Protein; auto TR HAMAP; MF_00643; -; 1; level=0 XX Names: PSII_PsbF XX ID PSBF DE RecName: Full=Cytochrome b559 subunit beta; DE AltName: Full=PSII reaction center subunit VI; GN Name=psbF; XX CC -!- FUNCTION: This b-type cytochrome is tightly associated with the CC reaction center of photosystem II (PSII). PSII is a light-driven CC water:plastoquinone oxidoreductase that uses light energy to abstract CC electrons from H(2)O, generating O(2) and a proton gradient CC subsequently used for ATP formation. It consists of a core antenna CC complex that captures photons, and an electron transfer chain that CC converts photonic excitation into a charge separation. CC -!- COFACTOR: CC Name=heme b; Xref=ChEBI:CHEBI:60344; CC Note=With its partner (PsbE) binds heme. PSII binds additional CC chlorophylls, carotenoids and specific lipids; case CC -!- SUBUNIT: Heterodimer of an alpha subunit and a beta subunit. PSII is CC composed of 1 copy each of membrane proteins PsbA, PsbB, PsbC, PsbD, CC PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK, PsbL, PsbM, PsbT, PsbX, PsbY, PsbZ, CC Psb30/Ycf12, peripheral proteins PsbO, CyanoQ (PsbQ), PsbU, PsbV and a CC large number of cofactors. It forms dimeric complexes. else CC -!- SUBUNIT: Heterodimer of an alpha subunit and a beta subunit. PSII is CC composed of 1 copy each of membrane proteins PsbA, PsbB, PsbC, PsbD, CC PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK, PsbL, PsbM, PsbT, PsbX, PsbY, PsbZ, CC Psb30/Ycf12, at least 3 peripheral proteins of the oxygen-evolving complex CC and a large number of cofactors. It forms dimeric complexes. end case case CC -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane; Single- CC pass membrane protein. else case CC -!- SUBCELLULAR LOCATION: Cell inner membrane; Single-pass membrane CC protein. else CC -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane; Single-pass membrane CC protein. end case CC -!- SIMILARITY: Belongs to the PsbE/PsbF family. XX DR Pfam; PF00283; Cytochrom_B559; 1; trigger=no DR PIRSF; PIRSF000037; PsbF; 1; trigger=no DR NCBIfam; TIGR01333; Cyt_b559_beta; 1; trigger=no DR PROSITE; PS00537; CYTOCHROME_B559; 1; trigger=no XX KW Photosynthesis KW Photosystem II KW Heme KW Iron KW Metal-binding KW Transport KW Electron transport case KW Cell membrane KW Cell inner membrane else KW Thylakoid end case KW Membrane KW Transmembrane KW Transmembrane helix XX GO GO:0009055; F:electron transfer activity GO GO:0005506; F:iron ion binding GO GO:0015979; P:photosynthesis case GO GO:0009535; C:chloroplast thylakoid membrane else case GO GO:0005886; C:plasma membrane else GO GO:0042651; C:thylakoid membrane end case XX FT From: PSBF_THEVL (P12239) FT TRANSMEM 20..36 FT /note="Helical" FT BINDING 24 FT /ligand="heme" FT /ligand_id="ChEBI:CHEBI:30413" FT /ligand_note="ligand shared with alpha subunit" FT /ligand_part="Fe" FT /ligand_part_id="ChEBI:CHEBI:18248" FT /note="axial binding residue" FT Condition: H XX Size: 38-51; Related: MF_00642; Template: Q8DIN9; P12239; P09191; Scope: Bacteria; Cyanobacteriota Plastid Fusion: Nter: None Cter: None Duplicate: None Plasmid: None Comments: None XX # Revision 1.47 2023/06/20 //