PETD_GUITH
ID PETD_GUITH Reviewed; 160 AA.
AC O78415;
DT 15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT 01-NOV-1998, sequence version 1.
DT 25-MAY-2022, entry version 105.
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 Guillardia theta (Cryptophyte) (Cryptomonas phi).
OG Plastid; Chloroplast.
OC Eukaryota; Cryptophyceae; Pyrenomonadales; Geminigeraceae; Guillardia.
OX NCBI_TaxID=55529;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX PubMed=9929392; DOI=10.1007/pl00006462;
RA Douglas S.E., Penny S.L.;
RT "The plastid genome of the cryptophyte alga, Guillardia theta: complete
RT sequence and conserved synteny groups confirm its common ancestry with red
RT algae.";
RL J. Mol. Evol. 48:236-244(1999).
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 (By similarity). {ECO:0000250}.
CC -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC {ECO:0000255|HAMAP-Rule:MF_01344}; Multi-pass membrane protein
CC {ECO:0000255|HAMAP-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; AF041468; AAC35600.1; -; Genomic_DNA.
DR RefSeq; NP_050666.1; NC_000926.1.
DR AlphaFoldDB; O78415; -.
DR SMR; O78415; -.
DR GeneID; 856952; -.
DR HOGENOM; CLU_112652_0_0_1; -.
DR OMA; KKGMGHN; -.
DR GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
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 Chloroplast; Electron transport; Membrane; Photosynthesis; Plastid;
KW Thylakoid; Transmembrane; Transmembrane helix; Transport.
FT CHAIN 1..160
FT /note="Cytochrome b6-f complex subunit 4"
FT /id="PRO_0000061862"
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 127..147
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01344"
SQ SEQUENCE 160 AA; 17557 MW; 519C083600A07CF3 CRC64;
MSVLKKPDLT DPKLRAKLAK GMGHNYYGEP AWPNDLLYIF PVVILGTLAC VIGLSVLAPS
PIGEKADPFA TPLEILPEWY FFPTFNLLRV IPNKLLGVLS MAAVPVGLIT VPFIESVNKF
QNPFRRPVAM TVFVFSVVFA IWLGIGATMP INKALTLGLF
