ID PETD_SYNS9 Reviewed; 160 AA.
AC Q3AWF1;
DT 31-OCT-2006, integrated into UniProtKB/Swiss-Prot.
DT 22-NOV-2005, sequence version 1.
DT 27-MAR-2024, entry version 116.
DE RecName: Full=Cytochrome b6-f complex subunit 4 {ECO:0000255|HAMAP-Rule:MF_01344};
DE AltName: Full=17 kDa polypeptide {ECO:0000255|HAMAP-Rule:MF_01344};
GN Name=petD {ECO:0000255|HAMAP-Rule:MF_01344};
GN OrderedLocusNames=Syncc9902_1848;
OS Synechococcus sp. (strain CC9902).
OC Bacteria; Cyanobacteriota; Cyanophyceae; Synechococcales; Synechococcaceae;
OC Synechococcus.
OX NCBI_TaxID=316279;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CC9902;
RA Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T.,
RA Hammon N., Israni S., Pitluck S., Martinez M., Schmutz J., Larimer F.,
RA Land M., Kyrpides N., Ivanova N., Richardson P.;
RT "Complete sequence of Synechococcus sp. CC9902.";
RL Submitted (AUG-2005) 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:0000255|HAMAP-Rule:MF_01344}.
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:0000255|HAMAP-
CC Rule:MF_01344}.
CC -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC Rule:MF_01344}; Multi-pass membrane protein {ECO:0000255|HAMAP-
CC Rule:MF_01344}.
CC -!- SIMILARITY: Belongs to the cytochrome b family. PetD subfamily.
CC {ECO:0000255|HAMAP-Rule:MF_01344}.
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DR EMBL; CP000097; ABB26805.1; -; Genomic_DNA.
DR RefSeq; WP_011360609.1; NC_007513.1.
DR AlphaFoldDB; Q3AWF1; -.
DR SMR; Q3AWF1; -.
DR STRING; 316279.Syncc9902_1848; -.
DR KEGG; sye:Syncc9902_1848; -.
DR eggNOG; COG1290; Bacteria.
DR HOGENOM; CLU_112652_0_0_3; -.
DR OrthoDB; 529454at2; -.
DR Proteomes; UP000002712; Chromosome.
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; Membrane; Photosynthesis; Thylakoid; Transmembrane;
KW Transmembrane helix; Transport.
FT CHAIN 1..160
FT /note="Cytochrome b6-f complex subunit 4"
FT /id="PRO_0000255578"
FT TRANSMEM 36..56
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01344"
FT TRANSMEM 95..115
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01344"
FT TRANSMEM 128..148
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01344"
SQ SEQUENCE 160 AA; 17778 MW; 9A4497A96695B835 CRC64;
MHILKKPDLS DPKMRAKLAK GMGHNYYGEP AWPNDLLYIF PVVILGTIAC VVGLAVLDPA
MLADKADPFA TPLEILPEWY LYPVFQILRV VPNKLLGIAL QTLVPLGLML VPFIESFNKF
QNPFRRPVAM TVFLFGTFTT IYLGIGAAMP IDKSLTLGLF
//
