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CHEB_OCEIH
ID   CHEB_OCEIH              Reviewed;         352 AA.
AC   Q8EQW0;
DT   22-AUG-2003, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-2003, sequence version 1.
DT   25-MAY-2022, entry version 116.
DE   RecName: Full=Protein-glutamate methylesterase/protein-glutamine glutaminase {ECO:0000255|HAMAP-Rule:MF_00099};
DE            EC=3.1.1.61 {ECO:0000255|HAMAP-Rule:MF_00099};
DE            EC=3.5.1.44 {ECO:0000255|HAMAP-Rule:MF_00099};
GN   Name=cheB {ECO:0000255|HAMAP-Rule:MF_00099}; OrderedLocusNames=OB1578;
OS   Oceanobacillus iheyensis (strain DSM 14371 / CIP 107618 / JCM 11309 / KCTC
OS   3954 / HTE831).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Oceanobacillus.
OX   NCBI_TaxID=221109;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 14371 / CIP 107618 / JCM 11309 / KCTC 3954 / HTE831;
RX   PubMed=12235376; DOI=10.1093/nar/gkf526;
RA   Takami H., Takaki Y., Uchiyama I.;
RT   "Genome sequence of Oceanobacillus iheyensis isolated from the Iheya Ridge
RT   and its unexpected adaptive capabilities to extreme environments.";
RL   Nucleic Acids Res. 30:3927-3935(2002).
CC   -!- FUNCTION: Involved in chemotaxis. Part of a chemotaxis signal
CC       transduction system that modulates chemotaxis in response to various
CC       stimuli. Catalyzes the demethylation of specific methylglutamate
CC       residues introduced into the chemoreceptors (methyl-accepting
CC       chemotaxis proteins or MCP) by CheR. Also mediates the irreversible
CC       deamidation of specific glutamine residues to glutamic acid.
CC       {ECO:0000255|HAMAP-Rule:MF_00099}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=[protein]-L-glutamate 5-O-methyl ester + H2O = H(+) + L-
CC         glutamyl-[protein] + methanol; Xref=Rhea:RHEA:23236, Rhea:RHEA-
CC         COMP:10208, Rhea:RHEA-COMP:10311, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:17790, ChEBI:CHEBI:29973,
CC         ChEBI:CHEBI:82795; EC=3.1.1.61; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00099};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=H2O + L-glutaminyl-[protein] = L-glutamyl-[protein] + NH4(+);
CC         Xref=Rhea:RHEA:16441, Rhea:RHEA-COMP:10207, Rhea:RHEA-COMP:10208,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:28938, ChEBI:CHEBI:29973,
CC         ChEBI:CHEBI:30011; EC=3.5.1.44; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00099};
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00099}.
CC   -!- DOMAIN: Contains a C-terminal catalytic domain, and an N-terminal
CC       region which modulates catalytic activity. {ECO:0000255|HAMAP-
CC       Rule:MF_00099}.
CC   -!- PTM: Phosphorylated by CheA. Phosphorylation of the N-terminal
CC       regulatory domain activates the methylesterase activity.
CC       {ECO:0000255|HAMAP-Rule:MF_00099}.
CC   -!- SIMILARITY: Belongs to the CheB family. {ECO:0000255|HAMAP-
CC       Rule:MF_00099}.
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DR   EMBL; BA000028; BAC13534.1; -; Genomic_DNA.
DR   RefSeq; WP_011065978.1; NC_004193.1.
DR   AlphaFoldDB; Q8EQW0; -.
DR   SMR; Q8EQW0; -.
DR   STRING; 221109.22777261; -.
DR   EnsemblBacteria; BAC13534; BAC13534; BAC13534.
DR   KEGG; oih:OB1578; -.
DR   eggNOG; COG2201; Bacteria.
DR   HOGENOM; CLU_000445_51_0_9; -.
DR   OMA; MLEMHRA; -.
DR   OrthoDB; 1655418at2; -.
DR   PhylomeDB; Q8EQW0; -.
DR   Proteomes; UP000000822; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0000156; F:phosphorelay response regulator activity; IEA:InterPro.
DR   GO; GO:0008984; F:protein-glutamate methylesterase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0050568; F:protein-glutamine glutaminase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006935; P:chemotaxis; IEA:UniProtKB-UniRule.
DR   GO; GO:0018277; P:protein deamination; IEA:UniProtKB-UniRule.
DR   GO; GO:0006482; P:protein demethylation; IEA:UniProtKB-UniRule.
DR   CDD; cd16432; CheB_Rec; 1.
DR   Gene3D; 3.40.50.180; -; 1.
DR   HAMAP; MF_00099; CheB_chemtxs; 1.
DR   InterPro; IPR008248; CheB-like.
DR   InterPro; IPR035909; CheB_C.
DR   InterPro; IPR011006; CheY-like_superfamily.
DR   InterPro; IPR000673; Sig_transdc_resp-reg_Me-estase.
DR   InterPro; IPR001789; Sig_transdc_resp-reg_receiver.
DR   Pfam; PF01339; CheB_methylest; 1.
DR   Pfam; PF00072; Response_reg; 1.
DR   PIRSF; PIRSF000876; RR_chemtxs_CheB; 1.
DR   SMART; SM00448; REC; 1.
DR   SUPFAM; SSF52172; SSF52172; 1.
DR   SUPFAM; SSF52738; SSF52738; 1.
DR   PROSITE; PS50122; CHEB; 1.
DR   PROSITE; PS50110; RESPONSE_REGULATORY; 1.
PE   3: Inferred from homology;
KW   Chemotaxis; Cytoplasm; Hydrolase; Phosphoprotein; Reference proteome.
FT   CHAIN           1..352
FT                   /note="Protein-glutamate methylesterase/protein-glutamine
FT                   glutaminase"
FT                   /id="PRO_0000158006"
FT   DOMAIN          5..122
FT                   /note="Response regulatory"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00099"
FT   DOMAIN          163..352
FT                   /note="CheB-type methylesterase"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00099"
FT   ACT_SITE        171
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00099"
FT   ACT_SITE        198
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00099"
FT   ACT_SITE        294
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00099"
FT   MOD_RES         56
FT                   /note="4-aspartylphosphate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00099"
SQ   SEQUENCE   352 AA;  38222 MW;  60D91A2389D623CA CRC64;
     MRKVRAIVID DSAFMRKIIS DILDNDPRIE VVAVARNGED GLNKVIQLSP DVVTLDVHMP
     KMDGMQALQR IMNEHPVPVV MLSSVTKAGA EKTIQAISNG AVDFIMKPSG SISLDIRNVE
     DEIRKKVILA STVRVKSTQE ASEEDFQSTR TVPTINREKK YRRSIVSIGT STGGPKALQK
     VLTELPKDIQ APIVIVQHMP PGFTKSLADR LNSICAISVK EAVHGEILQS GTAYIAPGGF
     HMQVENVGMS LAIALDKSPP LKGHRPSVNK LFSSLQHIKN YNKITCILTG MGNDGTDGLQ
     QLRLNEGSTI SLAESADTAI VYGMPKAAVN AGLIDYEMSL HEIPSLIVKQ LT
 
 
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