ID U7QPB0_9CYAN Unreviewed; 83 AA.
AC U7QPB0;
DT 22-JAN-2014, integrated into UniProtKB/TrEMBL.
DT 22-JAN-2014, sequence version 1.
DT 24-JAN-2024, entry version 41.
DE RecName: Full=Cytochrome b559 subunit alpha {ECO:0000256|HAMAP-Rule:MF_00642, ECO:0000256|RuleBase:RU000619};
DE AltName: Full=PSII reaction center subunit V {ECO:0000256|HAMAP-Rule:MF_00642, ECO:0000256|RuleBase:RU004529};
GN Name=psbE {ECO:0000256|HAMAP-Rule:MF_00642,
GN ECO:0000313|EMBL:ERT08920.1};
GN ORFNames=M595_1106 {ECO:0000313|EMBL:ERT08920.1};
OS Lyngbya aestuarii BL J.
OC Bacteria; Cyanobacteriota; Cyanophyceae; Oscillatoriophycideae;
OC Oscillatoriales; Oscillatoriaceae; Lyngbya.
OX NCBI_TaxID=1348334 {ECO:0000313|EMBL:ERT08920.1, ECO:0000313|Proteomes:UP000017127};
RN [1] {ECO:0000313|EMBL:ERT08920.1, ECO:0000313|Proteomes:UP000017127}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=BL J {ECO:0000313|EMBL:ERT08920.1,
RC ECO:0000313|Proteomes:UP000017127};
RX PubMed=24376438; DOI=10.3389/fmicb.2013.00363;
RA Kothari A., Vaughn M., Garcia-Pichel F.;
RT "Comparative genomic analyses of the cyanobacterium, Lyngbya aestuarii BL
RT J, a powerful hydrogen producer.";
RL Front. Microbiol. 4:363-363(2013).
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|ARBA:ARBA00037211, ECO:0000256|HAMAP-Rule:MF_00642,
CC ECO:0000256|RuleBase:RU004529}.
CC -!- COFACTOR:
CC Name=heme b; Xref=ChEBI:CHEBI:60344;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_00642};
CC Note=With its partner (PsbF) binds heme. PSII binds additional
CC chlorophylls, carotenoids and specific lipids. {ECO:0000256|HAMAP-
CC Rule:MF_00642};
CC -!- SUBUNIT: Heterodimer of an alpha subunit and a beta subunit.
CC {ECO:0000256|RuleBase:RU004529}.
CC -!- SUBUNIT: Heterodimer of an alpha subunit and 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.
CC {ECO:0000256|HAMAP-Rule:MF_00642}.
CC -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000256|HAMAP-
CC Rule:MF_00642, ECO:0000256|RuleBase:RU004529}; Single-pass membrane
CC protein {ECO:0000256|HAMAP-Rule:MF_00642,
CC ECO:0000256|RuleBase:RU004529}. Membrane
CC {ECO:0000256|ARBA:ARBA00004167}; Single-pass membrane protein
CC {ECO:0000256|ARBA:ARBA00004167}.
CC -!- SIMILARITY: Belongs to the PsbE/PsbF family. {ECO:0000256|HAMAP-
CC Rule:MF_00642, ECO:0000256|RuleBase:RU004529}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:ERT08920.1}.
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DR EMBL; AUZM01000007; ERT08920.1; -; Genomic_DNA.
DR RefSeq; WP_023065011.1; NZ_AUZM01000007.1.
DR AlphaFoldDB; U7QPB0; -.
DR PATRIC; fig|1348334.3.peg.1082; -.
DR OrthoDB; 514620at2; -.
DR Proteomes; UP000017127; Unassembled WGS sequence.
DR GO; GO:0009539; C:photosystem II reaction center; IEA:InterPro.
DR GO; GO:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
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 Gene3D; 1.20.5.860; Photosystem II cytochrome b559, alpha subunit; 1.
DR HAMAP; MF_00642; PSII_PsbE; 1.
DR InterPro; IPR006217; PSII_cyt_b559_asu.
DR InterPro; IPR037025; PSII_cyt_b559_asu_sf.
DR InterPro; IPR006216; PSII_cyt_b559_CS.
DR InterPro; IPR013081; PSII_cyt_b559_N.
DR InterPro; IPR013082; PSII_cytb559_asu_lum.
DR NCBIfam; TIGR01332; cyt_b559_alpha; 1.
DR PANTHER; PTHR33391; CYTOCHROME B559 SUBUNIT BETA-RELATED; 1.
DR PANTHER; PTHR33391:SF9; CYTOCHROME B559 SUBUNIT BETA-RELATED; 1.
DR Pfam; PF00283; Cytochrom_B559; 1.
DR Pfam; PF00284; Cytochrom_B559a; 1.
DR PIRSF; PIRSF000036; PsbE; 1.
DR SUPFAM; SSF161045; Cytochrome b559 subunits; 1.
DR PROSITE; PS00537; CYTOCHROME_B559; 1.
PE 3: Inferred from homology;
KW Electron transport {ECO:0000256|ARBA:ARBA00022982, ECO:0000256|HAMAP-
KW Rule:MF_00642};
KW Heme {ECO:0000256|ARBA:ARBA00022617, ECO:0000256|HAMAP-Rule:MF_00642};
KW Iron {ECO:0000256|ARBA:ARBA00023004, ECO:0000256|HAMAP-Rule:MF_00642};
KW Membrane {ECO:0000256|ARBA:ARBA00023136, ECO:0000256|HAMAP-Rule:MF_00642};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP-
KW Rule:MF_00642};
KW Photosynthesis {ECO:0000256|ARBA:ARBA00022531, ECO:0000256|HAMAP-
KW Rule:MF_00642};
KW Photosystem II {ECO:0000256|ARBA:ARBA00023276, ECO:0000256|HAMAP-
KW Rule:MF_00642}; Thylakoid {ECO:0000256|HAMAP-Rule:MF_00642};
KW Transmembrane {ECO:0000256|ARBA:ARBA00022692, ECO:0000256|HAMAP-
KW Rule:MF_00642};
KW Transmembrane helix {ECO:0000256|ARBA:ARBA00022989, ECO:0000256|HAMAP-
KW Rule:MF_00642};
KW Transport {ECO:0000256|ARBA:ARBA00022448, ECO:0000256|HAMAP-Rule:MF_00642}.
FT TRANSMEM 20..44
FT /note="Helical"
FT /evidence="ECO:0000256|RuleBase:RU004529"
FT DOMAIN 6..34
FT /note="Photosystem II cytochrome b559 N-terminal"
FT /evidence="ECO:0000259|Pfam:PF00283"
FT DOMAIN 42..81
FT /note="Photosystem II cytochrome b559 alpha subunit lumenal
FT region"
FT /evidence="ECO:0000259|Pfam:PF00284"
FT BINDING 23
FT /ligand="heme"
FT /ligand_id="ChEBI:CHEBI:30413"
FT /ligand_note="ligand shared with beta subunit"
FT /ligand_part="Fe"
FT /ligand_part_id="ChEBI:CHEBI:18248"
FT /note="axial binding residue"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00642"
SQ SEQUENCE 83 AA; 9387 MW; A8E0E6C60A6154B0 CRC64;
MAGDTGERPF GDIITSVRYW VIHSITIPAL FIAGWLFVST GLAYDAFGTP RPDEYFPTQE
RQEIPIVTDR FSGKQQIDEY TGK
//
