ID   FLHD_SERMA              Reviewed;         119 AA.
AC   O85806;
DT   30-MAY-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1998, sequence version 1.
DT   25-MAY-2022, entry version 90.
DE   RecName: Full=Flagellar transcriptional regulator FlhD {ECO:0000255|HAMAP-Rule:MF_00725};
GN   Name=flhD {ECO:0000255|HAMAP-Rule:MF_00725};
OS   Serratia marcescens.
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Yersiniaceae; Serratia.
OX   NCBI_TaxID=615;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND FUNCTION.
RC   STRAIN=CH1;
RX   PubMed=11060496; DOI=10.1159/000025483;
RA   Lai H.C., Luh K.T., Ho S.W., Swift S.;
RT   "Role of flhDC in the expression of the nuclease gene nucA, cell division
RT   and flagellar synthesis in Serratia marcescens.";
RL   J. Biomed. Sci. 7:475-483(2000).
CC   -!- FUNCTION: Functions in complex with FlhC as a master transcriptional
CC       regulator that regulates transcription of several flagellar and non-
CC       flagellar operons by binding to their promoter region. Activates
CC       expression of class 2 flagellar genes, including fliA, which is a
CC       flagellum-specific sigma factor that turns on the class 3 genes. Also
CC       regulates genes whose products function in a variety of physiological
CC       pathways. {ECO:0000255|HAMAP-Rule:MF_00725,
CC       ECO:0000269|PubMed:11060496}.
CC   -!- SUBUNIT: Homodimer; disulfide-linked. Forms a heterohexamer composed of
CC       two FlhC and four FlhD subunits. Each FlhC binds a FlhD dimer, forming
CC       a heterotrimer, and a hexamer assembles by dimerization of two
CC       heterotrimers. {ECO:0000255|HAMAP-Rule:MF_00725}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00725}.
CC   -!- DOMAIN: The C-terminal region contains a putative helix-turn-helix
CC       (HTH) motif, suggesting that this region may bind DNA.
CC       {ECO:0000255|HAMAP-Rule:MF_00725}.
CC   -!- SIMILARITY: Belongs to the FlhD family. {ECO:0000255|HAMAP-
CC       Rule:MF_00725}.
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DR   EMBL; AF077334; AAC27633.1; -; Genomic_DNA.
DR   AlphaFoldDB; O85806; -.
DR   SMR; O85806; -.
DR   IntAct; O85806; 1.
DR   STRING; 273526.SMDB11_2238; -.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0044780; P:bacterial-type flagellum assembly; IEA:InterPro.
DR   GO; GO:0045893; P:positive regulation of transcription, DNA-templated; IEA:InterPro.
DR   GO; GO:1902208; P:regulation of bacterial-type flagellum assembly; IEA:UniProtKB-UniRule.
DR   Gene3D; 1.10.4000.10; -; 1.
DR   HAMAP; MF_00725; FlhD; 1.
DR   InterPro; IPR023559; Flagellar_FlhD.
DR   InterPro; IPR036194; FlhD_sf.
DR   Pfam; PF05247; FlhD; 1.
DR   SUPFAM; SSF63592; SSF63592; 1.
PE   3: Inferred from homology;
KW   Activator; Bacterial flagellum biogenesis; Cytoplasm; Disulfide bond;
KW   DNA-binding; Transcription; Transcription regulation; Virulence.
FT   CHAIN           1..119
FT                   /note="Flagellar transcriptional regulator FlhD"
FT                   /id="PRO_0000182726"
FT   DISULFID        68
FT                   /note="Interchain"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00725"
SQ   SEQUENCE   119 AA;  13456 MW;  15EBFC519F79B65A CRC64;
     MGNMGTSELL KHIYDINLSY LLLAQRLIND EKASAMFRLG IDETMADALA QLTLPQMVKL
     AETNQLVCHF RFNESQTIER LTKESRVDDL QQIHTGILLS SHLLQELSSK DASPTKKRA