ID   FRDD_HAEIE              Reviewed;         114 AA.
AC   A5UDP2;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   10-JUL-2007, sequence version 1.
DT   25-MAY-2022, entry version 71.
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};
GN   OrderedLocusNames=CGSHiEE_07900;
OS   Haemophilus influenzae (strain PittEE).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pasteurellales;
OC   Pasteurellaceae; Haemophilus.
OX   NCBI_TaxID=374930;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PittEE;
RX   PubMed=17550610; DOI=10.1186/gb-2007-8-6-r103;
RA   Hogg J.S., Hu F.Z., Janto B., Boissy R., Hayes J., Keefe R., Post J.C.,
RA   Ehrlich G.D.;
RT   "Characterization and modeling of the Haemophilus influenzae core and
RT   supragenomes based on the complete genomic sequences of Rd and 12 clinical
RT   nontypeable strains.";
RL   Genome Biol. 8:R103.1-R103.18(2007).
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; CP000671; ABQ98893.1; -; Genomic_DNA.
DR   RefSeq; WP_005631316.1; NC_009566.1.
DR   AlphaFoldDB; A5UDP2; -.
DR   SMR; A5UDP2; -.
DR   KEGG; hip:CGSHiEE_07900; -.
DR   HOGENOM; CLU_168367_0_0_6; -.
DR   OMA; ACYAFAG; -.
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; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..114
FT                   /note="Fumarate reductase subunit D"
FT                   /id="PRO_1000045551"
FT   TRANSMEM        24..44
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        92..112
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00709"
SQ   SEQUENCE   114 AA;  12642 MW;  82DAA104717C9E8B CRC64;
     MVDQNPKRSG EPPVWLMFGA GGTVSAIFFP VVILIIGLLL PFGLVDAHNL ITFAYSWIGK
     LVILVLTIFP MWCGLHRIHH GMHDLKVHVP AGGFIFYGLA TIYTVWVLFA VINL