PETD_DESSP
ID PETD_DESSP Reviewed; 160 AA.
AC P12117;
DT 01-OCT-1989, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-1989, sequence version 1.
DT 25-MAY-2022, entry version 91.
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};
OS Desmonostoc sp. (strain PCC 7906) (Nostoc sp. (strain PCC 7906)).
OC Bacteria; Cyanobacteria; Nostocales; Nostocaceae; Desmonostoc.
OX NCBI_TaxID=1181;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=2844767; DOI=10.1016/s0021-9258(18)68225-0;
RA Kallas T., Spiller S., Malkin R.;
RT "Characterization of two operons encoding the cytochrome b6-f complex of
RT the cyanobacterium Nostoc PCC 7906. Highly conserved sequences but
RT different gene organization than in chloroplasts.";
RL J. Biol. Chem. 263:14334-14342(1988).
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; J03967; AAA23331.1; -; Genomic_DNA.
DR AlphaFoldDB; P12117; -.
DR SMR; P12117; -.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
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 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 Pfam; PF00032; Cytochrom_B_C; 1.
DR PIRSF; PIRSF000033; B6f_17K; 1.
DR SUPFAM; SSF81648; SSF81648; 1.
DR TIGRFAMs; TIGR01156; cytb6/f_IV; 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_0000061902"
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 131..151
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01344"
SQ SEQUENCE 160 AA; 17522 MW; 58351EA8FA54F713 CRC64;
MATQKKPDLS DPQLRAKLAK GMGHNYYGEP AWPNDLLYVF PIVIMGSFAA IVALAVLDPA
MTGEPANPFA TPLEILPEWY LYPVFQILRS LPNKLLGVLA MASVPLGLIL VPFIENVNKF
QNPFRRPVAT TVFLFGTLVT LWLGIGAALP LDKSLTLGLF
