ID A0A386AXR9_9CHLO Unreviewed; 41 AA. AC A0A386AXR9; DT 05-DEC-2018, integrated into UniProtKB/TrEMBL. DT 05-DEC-2018, sequence version 1. DT 14-DEC-2022, entry version 13. DE RecName: Full=Cytochrome b559 subunit beta {ECO:0000256|HAMAP-Rule:MF_00643, ECO:0000256|RuleBase:RU004529}; DE AltName: Full=PSII reaction center subunit VI {ECO:0000256|HAMAP-Rule:MF_00643, ECO:0000256|RuleBase:RU004529}; GN Name=psbF {ECO:0000256|HAMAP-Rule:MF_00643, GN ECO:0000313|EMBL:AYC64155.1}; OS Johnson-sea-linkia profunda. OG Plastid; Chloroplast {ECO:0000313|EMBL:AYC64155.1}. OC Eukaryota; Viridiplantae; Chlorophyta; Ulvophyceae; TCBD clade; OC Bryopsidales; Halimedineae; Halimedaceae; Rhipileae; Johnson-sea-linkia. OX NCBI_TaxID=575876 {ECO:0000313|EMBL:AYC64155.1}; RN [1] {ECO:0000313|EMBL:AYC64155.1} RP NUCLEOTIDE SEQUENCE. RA Quirk P.G., Krulwich T.A.; RL Submitted (JUL-2018) to the EMBL/GenBank/DDBJ databases. RN [2] {ECO:0000313|EMBL:AYC64155.1} RP NUCLEOTIDE SEQUENCE. RX PubMed=30227214; DOI=10.1016/j.ympev.2018.09.009; RA Cremen M.C., Leliaert F., West J., Lam D.W., Shimada S., RA Lopez-Bautista J.M., Verbruggen H.; RT "Reassessment of the classification of bryopsidales (chlorophyta) based on RT chloroplast phylogenomic analyses."; RL Mol. Phylogenet. Evol. 130:397-405(2019). 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 {ECO:0000256|HAMAP-Rule:MF_00643, ECO:0000256|RuleBase:RU004529}. CC -!- COFACTOR: CC Name=heme b; Xref=ChEBI:CHEBI:60344; CC Evidence={ECO:0000256|HAMAP-Rule:MF_00643}; CC Note=With its partner (PsbE) binds heme. PSII binds additional CC chlorophylls, carotenoids and specific lipids. {ECO:0000256|HAMAP- CC Rule:MF_00643}; 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 Ycf12, at least 3 peripheral proteins of the oxygen-evolving complex CC and a large number of cofactors. It forms dimeric complexes. CC {ECO:0000256|HAMAP-Rule:MF_00643}. CC -!- SUBCELLULAR LOCATION: Membrane {ECO:0000256|ARBA:ARBA00004167}; Single- CC pass membrane protein {ECO:0000256|ARBA:ARBA00004167}. Plastid, CC chloroplast thylakoid membrane {ECO:0000256|HAMAP-Rule:MF_00643, CC ECO:0000256|RuleBase:RU004529}; Single-pass membrane protein CC {ECO:0000256|HAMAP-Rule:MF_00643, ECO:0000256|RuleBase:RU004529}. CC -!- SIMILARITY: Belongs to the PsbE/PsbF family. {ECO:0000256|HAMAP- CC Rule:MF_00643, ECO:0000256|RuleBase:RU004529}. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; MH591089; AYC64155.1; -; Genomic_DNA. DR AlphaFoldDB; A0A386AXR9; -. DR GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell. DR GO; GO:0009539; C:photosystem II reaction center; IEA:InterPro. DR GO; GO:0009055; F:electron transfer activity; IEA:UniProtKB-UniRule. DR GO; GO:0020037; F:heme binding; IEA:InterPro. DR GO; GO:0005506; F:iron ion binding; IEA:UniProtKB-UniRule. DR GO; GO:0009767; P:photosynthetic electron transport chain; IEA:InterPro. DR HAMAP; MF_00643; PSII_PsbF; 1. DR InterPro; IPR006241; PSII_cyt_b559_bsu. DR InterPro; IPR006216; PSII_cyt_b559_CS. DR InterPro; IPR013081; PSII_cyt_b559_N. DR PANTHER; PTHR33391:SF14; CYTOCHROME B559 SUBUNIT BETA; 1. DR Pfam; PF00283; Cytochrom_B559; 1. DR PIRSF; PIRSF000037; PsbF; 1. DR TIGRFAMs; TIGR01333; cyt_b559_beta; 1. DR PROSITE; PS00537; CYTOCHROME_B559; 1. PE 3: Inferred from homology; KW Chloroplast {ECO:0000256|RuleBase:RU004529, ECO:0000313|EMBL:AYC64155.1}; KW Electron transport {ECO:0000256|ARBA:ARBA00022982, ECO:0000256|HAMAP- KW Rule:MF_00643}; KW Heme {ECO:0000256|ARBA:ARBA00022617, ECO:0000256|HAMAP-Rule:MF_00643}; KW Iron {ECO:0000256|ARBA:ARBA00023004, ECO:0000256|HAMAP-Rule:MF_00643}; KW Membrane {ECO:0000256|ARBA:ARBA00023136, ECO:0000256|HAMAP-Rule:MF_00643}; KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP- KW Rule:MF_00643}; KW Photosynthesis {ECO:0000256|ARBA:ARBA00022531, ECO:0000256|HAMAP- KW Rule:MF_00643}; KW Photosystem II {ECO:0000256|ARBA:ARBA00023276, ECO:0000256|HAMAP- KW Rule:MF_00643}; Plastid {ECO:0000313|EMBL:AYC64155.1}; KW Thylakoid {ECO:0000256|HAMAP-Rule:MF_00643}; KW Transmembrane {ECO:0000256|ARBA:ARBA00022692, ECO:0000256|HAMAP- KW Rule:MF_00643}; KW Transmembrane helix {ECO:0000256|ARBA:ARBA00022989, ECO:0000256|HAMAP- KW Rule:MF_00643}; KW Transport {ECO:0000256|ARBA:ARBA00022448, ECO:0000256|HAMAP-Rule:MF_00643}. FT TRANSMEM 16..40 FT /note="Helical" FT /evidence="ECO:0000256|RuleBase:RU004529" FT DOMAIN 8..31 FT /note="Cytochrom_B559" FT /evidence="ECO:0000259|Pfam:PF00283" FT BINDING 20 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 /evidence="ECO:0000256|HAMAP-Rule:MF_00643" SQ SEQUENCE 41 AA; 4643 MW; 8838576391658FA7 CRC64; MTTKKSTDYP IFTVRWLAVH GLAVPTIFFL GAITAMQFIV R //