ID   FRDD_HAEDU              Reviewed;         114 AA.
AC   P59844;
DT   09-SEP-2003, integrated into UniProtKB/Swiss-Prot.
DT   09-SEP-2003, sequence version 1.
DT   25-MAY-2022, entry version 94.
DE   RecName: Full=Fumarate reductase subunit D {ECO:0000255|HAMAP-Rule:MF_00709};
DE   AltName: Full=Quinol-fumarate reductase subunit D {ECO:0000255|HAMAP-Rule:MF_00709};
DE            Short=QFR subunit D {ECO:0000255|HAMAP-Rule:MF_00709};
GN   Name=frdD {ECO:0000255|HAMAP-Rule:MF_00709}; OrderedLocusNames=HD_0034;
OS   Haemophilus ducreyi (strain 35000HP / ATCC 700724).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pasteurellales;
OC   Pasteurellaceae; Haemophilus.
OX   NCBI_TaxID=233412;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=35000HP / ATCC 700724;
RA   Munson R.S. Jr., Ray W.C., Mahairas G., Sabo P., Mungur R., Johnson L.,
RA   Nguyen D., Wang J., Forst C., Hood L.;
RT   "The complete genome sequence of Haemophilus ducreyi.";
RL   Submitted (JUN-2003) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Anchors the catalytic components of the fumarate reductase
CC       complex to the cell membrane, binds quinones. {ECO:0000255|HAMAP-
CC       Rule:MF_00709}.
CC   -!- SUBUNIT: Part of an enzyme complex containing four subunits: a
CC       flavoprotein (FrdA), an iron-sulfur protein (FrdB), and two hydrophobic
CC       anchor proteins (FrdC and FrdD). {ECO:0000255|HAMAP-Rule:MF_00709}.
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane {ECO:0000255|HAMAP-
CC       Rule:MF_00709}; Multi-pass membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_00709}.
CC   -!- SIMILARITY: Belongs to the FrdD family. {ECO:0000255|HAMAP-
CC       Rule:MF_00709}.
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DR   EMBL; AE017143; AAP95049.1; -; Genomic_DNA.
DR   RefSeq; WP_010944103.1; NC_002940.2.
DR   AlphaFoldDB; P59844; -.
DR   SMR; P59844; -.
DR   STRING; 233412.HD_0034; -.
DR   EnsemblBacteria; AAP95049; AAP95049; HD_0034.
DR   GeneID; 60733408; -.
DR   KEGG; hdu:HD_0034; -.
DR   eggNOG; COG3080; Bacteria.
DR   HOGENOM; CLU_168367_0_0_6; -.
DR   OMA; ACYAFAG; -.
DR   Proteomes; UP000001022; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0045284; C:plasma membrane fumarate reductase complex; IEA:UniProtKB-UniRule.
DR   GO; GO:0000104; F:succinate dehydrogenase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006106; P:fumarate metabolic process; IEA:InterPro.
DR   CDD; cd00547; QFR_TypeD_subunitD; 1.
DR   Gene3D; 1.20.1300.10; -; 1.
DR   HAMAP; MF_00709; Fumarate_red_D; 1.
DR   InterPro; IPR003418; Fumarate_red_D.
DR   InterPro; IPR034804; SQR/QFR_C/D.
DR   Pfam; PF02313; Fumarate_red_D; 1.
DR   PIRSF; PIRSF000179; FrdD; 1.
DR   SUPFAM; SSF81343; SSF81343; 1.
PE   3: Inferred from homology;
KW   Cell inner membrane; Cell membrane; Membrane; Reference proteome;
KW   Transmembrane; Transmembrane helix.
FT   CHAIN           1..114
FT                   /note="Fumarate reductase subunit D"
FT                   /id="PRO_0000196545"
FT   TRANSMEM        27..47
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00709"
FT   TRANSMEM        50..70
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00709"
FT   TRANSMEM        94..114
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00709"
SQ   SEQUENCE   114 AA;  12623 MW;  6977A65B45A7F610 CRC64;
     MNKQDPKRSN EPPVWLMFSA GGTISAICFP VLILILGILL PLGLIPMDNI IVFAHTWLGK
     LVILAVTIFP MWAGMHRVHH GLHDLKIHLP ASGWLFYGLS TLYSIVVLFA VIAL