PHOQ_SALCH
ID PHOQ_SALCH Reviewed; 487 AA.
AC Q57QC4;
DT 16-AUG-2005, integrated into UniProtKB/Swiss-Prot.
DT 10-MAY-2005, sequence version 1.
DT 03-AUG-2022, entry version 105.
DE RecName: Full=Virulence sensor histidine kinase PhoQ;
DE EC=2.7.13.3;
DE EC=3.1.3.-;
DE AltName: Full=Sensor histidine protein kinase/phosphatase PhoQ;
GN Name=phoQ; OrderedLocusNames=SCH_1181;
OS Salmonella choleraesuis (strain SC-B67).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC Enterobacteriaceae; Salmonella.
OX NCBI_TaxID=321314;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=SC-B67;
RX PubMed=15781495; DOI=10.1093/nar/gki297;
RA Chiu C.-H., Tang P., Chu C., Hu S., Bao Q., Yu J., Chou Y.-Y., Wang H.-S.,
RA Lee Y.-S.;
RT "The genome sequence of Salmonella enterica serovar Choleraesuis, a highly
RT invasive and resistant zoonotic pathogen.";
RL Nucleic Acids Res. 33:1690-1698(2005).
CC -!- FUNCTION: Member of the two-component regulatory system PhoP/PhoQ which
CC regulates the expression of genes involved in virulence and resistance
CC to host defense antimicrobial peptides. In low periplasmic Mg(2+), PhoQ
CC functions as a membrane-associated protein kinase that undergoes
CC autophosphorylation and subsequently transfers the phosphate to PhoP,
CC which results in the expression of PhoP-activated genes (PAG) and
CC repression of PhoP-repressed genes (PRG). In high periplasmic Mg(2+),
CC acts as a protein phosphatase that dephosphorylates phospho-PhoP, which
CC results in the repression of PAG and may lead to expression of some PRG
CC (By similarity). {ECO:0000250}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=ATP + protein L-histidine = ADP + protein N-phospho-L-
CC histidine.; EC=2.7.13.3;
CC -!- SUBUNIT: Homodimer. {ECO:0000250}.
CC -!- SUBCELLULAR LOCATION: Cell inner membrane {ECO:0000250}; Multi-pass
CC membrane protein {ECO:0000250}.
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DR EMBL; AE017220; AAX65087.1; -; Genomic_DNA.
DR RefSeq; WP_001031687.1; NC_006905.1.
DR AlphaFoldDB; Q57QC4; -.
DR SMR; Q57QC4; -.
DR EnsemblBacteria; AAX65087; AAX65087; SCH_1181.
DR KEGG; sec:SCH_1181; -.
DR HOGENOM; CLU_000445_42_0_6; -.
DR OMA; TLVFIYD; -.
DR Proteomes; UP000000538; Chromosome.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0004721; F:phosphoprotein phosphatase activity; IEA:UniProtKB-KW.
DR GO; GO:0000155; F:phosphorelay sensor kinase activity; IEA:InterPro.
DR GO; GO:0040008; P:regulation of growth; IEA:UniProtKB-KW.
DR Gene3D; 3.30.450.140; -; 1.
DR Gene3D; 3.30.565.10; -; 1.
DR InterPro; IPR003660; HAMP_dom.
DR InterPro; IPR003594; HATPase_C.
DR InterPro; IPR036890; HATPase_C_sf.
DR InterPro; IPR005467; His_kinase_dom.
DR InterPro; IPR036097; HisK_dim/P_sf.
DR InterPro; IPR015014; PhoQ_Sensor.
DR InterPro; IPR038429; PhoQ_Sensor_sf.
DR InterPro; IPR004358; Sig_transdc_His_kin-like_C.
DR Pfam; PF02518; HATPase_c; 1.
DR Pfam; PF08918; PhoQ_Sensor; 1.
DR PRINTS; PR00344; BCTRLSENSOR.
DR SMART; SM00387; HATPase_c; 1.
DR SUPFAM; SSF47384; SSF47384; 1.
DR SUPFAM; SSF55874; SSF55874; 1.
DR PROSITE; PS50885; HAMP; 1.
DR PROSITE; PS50109; HIS_KIN; 1.
PE 3: Inferred from homology;
KW ATP-binding; Cell inner membrane; Cell membrane; Growth regulation;
KW Hydrolase; Kinase; Magnesium; Membrane; Metal-binding; Nucleotide-binding;
KW Phosphoprotein; Protein phosphatase; Transferase; Transmembrane;
KW Transmembrane helix; Two-component regulatory system; Virulence.
FT CHAIN 1..487
FT /note="Virulence sensor histidine kinase PhoQ"
FT /id="PRO_0000074840"
FT TOPO_DOM 1..16
FT /note="Cytoplasmic"
FT /evidence="ECO:0000255"
FT TRANSMEM 17..37
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TOPO_DOM 38..193
FT /note="Periplasmic"
FT /evidence="ECO:0000255"
FT TRANSMEM 194..214
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TOPO_DOM 215..487
FT /note="Cytoplasmic"
FT /evidence="ECO:0000255"
FT DOMAIN 215..266
FT /note="HAMP"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00102"
FT DOMAIN 274..481
FT /note="Histidine kinase"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00107"
FT BINDING 151
FT /ligand="a divalent metal cation"
FT /ligand_id="ChEBI:CHEBI:60240"
FT /evidence="ECO:0000250"
FT BINDING 152
FT /ligand="a divalent metal cation"
FT /ligand_id="ChEBI:CHEBI:60240"
FT /evidence="ECO:0000250"
FT BINDING 386..394
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250"
FT BINDING 386
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000250"
FT BINDING 416..421
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250"
FT BINDING 435..447
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250"
FT BINDING 443
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000250"
FT SITE 202
FT /note="Plays a critical role in the switching between
FT kinase and phosphatase states"
FT /evidence="ECO:0000250"
FT MOD_RES 277
FT /note="Phosphohistidine; by autocatalysis"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00107"
SQ SEQUENCE 487 AA; 55467 MW; BDCFEFC56F4CA058 CRC64;
MNKFARHFLP LSLRVRFLLA TAGVVLVLSL AYGIVALVGY SVSFDKTTFR LLRGESNLFY
TLAKWENNKI SVELPENLDM QSPTMTLIYD ETGKLLWTQR NIPWLIKSIQ PEWLKTNGFH
EIETNVDATS TLLSEDHSAQ EKLKEVREDD DDAEMTHSVA VNIYPATARM PQLTIVVVDT
IPIELKRSYM VWSWFVYVLA ANLLLVIPLL WIAAWWSLRP IEALAREVRE LEDHHREMLN
PETTRELTSL VRNLNQLLKS ERERYNKYRT TLTDLTHSLK TPLAVLQSTL RSLRNEKMSV
SKAEPVMLEQ ISRISQQIGY YLHRASMRGS GVLLSRELHP VAPLLDNLIS ALNKVYQRKG
VNISMDISPE ISFVGEQNDF VEVMGNVLDN ACKYCLEFVE ISARQTDDHL HIFVEDDGPG
IPHSKRSLVF DRGQRADTLR PGQGVGLAVA REITEQYAGQ IIASDSLLGG ARMEVVFGRQ
HPTQKEE
