ID   FRDD_HAEI8              Reviewed;         114 AA.
AC   Q4QM68;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   19-JUL-2005, sequence version 1.
DT   25-MAY-2022, entry version 77.
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=NTHI0998;
OS   Haemophilus influenzae (strain 86-028NP).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pasteurellales;
OC   Pasteurellaceae; Haemophilus.
OX   NCBI_TaxID=281310;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=86-028NP;
RX   PubMed=15968074; DOI=10.1128/jb.187.13.4627-4636.2005;
RA   Harrison A., Dyer D.W., Gillaspy A., Ray W.C., Mungur R., Carson M.B.,
RA   Zhong H., Gipson J., Gipson M., Johnson L.S., Lewis L., Bakaletz L.O.,
RA   Munson R.S. Jr.;
RT   "Genomic sequence of an otitis media isolate of nontypeable Haemophilus
RT   influenzae: comparative study with H. influenzae serotype d, strain KW20.";
RL   J. Bacteriol. 187:4627-4636(2005).
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; CP000057; AAX87879.1; -; Genomic_DNA.
DR   RefSeq; WP_005690445.1; NC_007146.2.
DR   AlphaFoldDB; Q4QM68; -.
DR   SMR; Q4QM68; -.
DR   EnsemblBacteria; AAX87879; AAX87879; NTHI0998.
DR   KEGG; hit:NTHI0998; -.
DR   HOGENOM; CLU_168367_0_0_6; -.
DR   OMA; ACYAFAG; -.
DR   OrthoDB; 2071715at2; -.
DR   Proteomes; UP000002525; 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; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..114
FT                   /note="Fumarate reductase subunit D"
FT                   /id="PRO_1000045550"
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;  12608 MW;  D270ABAE7171FE86 CRC64;
     MVDQNPKRSG EPPVWLMFGA GGTVSAIFLP VVILIIGLLL PFGLVDAHNL ITFAYSWIGK
     LVILVLTIFP MWCGLHRIHH GMHDLKVHVP AGGFIFYGLA TIYTVWVLFA VINL