ID A0A1C0VDG6_9CYAN Unreviewed; 160 AA.
AC A0A1C0VDG6;
DT 02-NOV-2016, integrated into UniProtKB/TrEMBL.
DT 02-NOV-2016, sequence version 1.
DT 27-MAR-2024, entry version 19.
DE RecName: Full=Cytochrome b6-f complex subunit 4 {ECO:0000256|HAMAP-Rule:MF_01344, ECO:0000256|RuleBase:RU003329};
DE AltName: Full=17 kDa polypeptide {ECO:0000256|HAMAP-Rule:MF_01344};
GN Name=petD {ECO:0000256|HAMAP-Rule:MF_01344};
GN ORFNames=BCR12_17035 {ECO:0000313|EMBL:OCQ95868.1};
OS Limnothrix sp. P13C2.
OC Bacteria; Cyanobacteriota; Cyanophyceae; Pseudanabaenales;
OC Pseudanabaenaceae; Limnothrix.
OX NCBI_TaxID=1880902 {ECO:0000313|EMBL:OCQ95868.1, ECO:0000313|Proteomes:UP000093334};
RN [1] {ECO:0000313|EMBL:OCQ95868.1, ECO:0000313|Proteomes:UP000093334}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=P13C2 {ECO:0000313|EMBL:OCQ95868.1};
RA Tan B., Te S.H., Gin K., Thompson J.;
RT "Draft genome of Limnothrix sp. P13C2.";
RL Submitted (JUL-2016) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Component of the cytochrome b6-f complex, which mediates
CC electron transfer between photosystem II (PSII) and photosystem I
CC (PSI), cyclic electron flow around PSI, and state transitions.
CC {ECO:0000256|HAMAP-Rule:MF_01344, ECO:0000256|RuleBase:RU003329}.
CC -!- SUBUNIT: The 4 large subunits of the cytochrome b6-f complex are
CC cytochrome b6, subunit IV (17 kDa polypeptide, PetD), cytochrome f and
CC the Rieske protein, while the 4 small subunits are PetG, PetL, PetM and
CC PetN. The complex functions as a dimer. {ECO:0000256|ARBA:ARBA00025834,
CC ECO:0000256|HAMAP-Rule:MF_01344, ECO:0000256|RuleBase:RU003329}.
CC -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000256|HAMAP-
CC Rule:MF_01344}; Multi-pass membrane protein {ECO:0000256|HAMAP-
CC Rule:MF_01344}. Membrane {ECO:0000256|ARBA:ARBA00004141}; Multi-pass
CC membrane protein {ECO:0000256|ARBA:ARBA00004141}.
CC -!- SIMILARITY: Belongs to the cytochrome b family. PetD subfamily.
CC {ECO:0000256|HAMAP-Rule:MF_01344, ECO:0000256|RuleBase:RU003329}.
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:OCQ95868.1}.
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DR EMBL; MBRF01000010; OCQ95868.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1C0VDG6; -.
DR STRING; 1880902.BCR12_17035; -.
DR Proteomes; UP000093334; Unassembled WGS sequence.
DR GO; GO:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0045158; F:electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity; IEA:UniProtKB-UniRule.
DR GO; GO:0045156; F:electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activity; IEA:InterPro.
DR GO; GO:0009767; P:photosynthetic electron transport chain; IEA:InterPro.
DR CDD; cd00290; cytochrome_b_C; 1.
DR Gene3D; 1.10.287.980; plastocyanin oxidoreductase; 1.
DR Gene3D; 1.20.5.510; Single helix bin; 1.
DR HAMAP; MF_01344; Cytb6_f_subIV; 1.
DR InterPro; IPR005798; Cyt_b/b6_C.
DR InterPro; IPR036150; Cyt_b/b6_C_sf.
DR InterPro; IPR005870; Cyt_b6/f_cplx_suIV.
DR InterPro; IPR048260; Cytochrome_b_C_euk/bac.
DR NCBIfam; TIGR01156; cytb6_f_IV; 1.
DR PANTHER; PTHR19271; CYTOCHROME B; 1.
DR PANTHER; PTHR19271:SF16; CYTOCHROME B; 1.
DR Pfam; PF00032; Cytochrom_B_C; 1.
DR PIRSF; PIRSF000033; B6f_17K; 1.
DR SUPFAM; SSF81648; a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase); 1.
DR PROSITE; PS51003; CYTB_CTER; 1.
PE 3: Inferred from homology;
KW Electron transport {ECO:0000256|ARBA:ARBA00022982, ECO:0000256|HAMAP-
KW Rule:MF_01344};
KW Membrane {ECO:0000256|ARBA:ARBA00023136, ECO:0000256|HAMAP-Rule:MF_01344};
KW Photosynthesis {ECO:0000256|ARBA:ARBA00022531, ECO:0000256|HAMAP-
KW Rule:MF_01344}; Reference proteome {ECO:0000313|Proteomes:UP000093334};
KW Thylakoid {ECO:0000256|ARBA:ARBA00023078, ECO:0000256|HAMAP-Rule:MF_01344};
KW Transmembrane {ECO:0000256|ARBA:ARBA00022692, ECO:0000256|HAMAP-
KW Rule:MF_01344};
KW Transmembrane helix {ECO:0000256|ARBA:ARBA00022989, ECO:0000256|HAMAP-
KW Rule:MF_01344};
KW Transport {ECO:0000256|ARBA:ARBA00022448, ECO:0000256|HAMAP-Rule:MF_01344}.
FT TRANSMEM 36..57
FT /note="Helical"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01344"
FT TRANSMEM 95..114
FT /note="Helical"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01344"
FT TRANSMEM 129..151
FT /note="Helical"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01344"
FT DOMAIN 35..160
FT /note="Cytochrome b/b6 C-terminal region profile"
FT /evidence="ECO:0000259|PROSITE:PS51003"
SQ SEQUENCE 160 AA; 17614 MW; 98B3D589E452A0F9 CRC64;
MSILKKPDLS DPNLRLKLAK GMGHNYYGEP AWPNDLLYVF PVVILGTFAL MVGLAVLDPA
IVGEPADPFA TPLEILPEWY LYPVFQILRI LPNKLLGIAC MGGIPLGLML VPFIENVNKF
QNPFRRPVAM ASFLFGTAFA IWLGIGAIMP IDKSLTLGLF
//