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CHEB3_GEOMG
ID   CHEB3_GEOMG             Reviewed;         355 AA.
AC   Q39SY1;
DT   12-DEC-2006, integrated into UniProtKB/Swiss-Prot.
DT   22-NOV-2005, sequence version 1.
DT   25-MAY-2022, entry version 98.
DE   RecName: Full=Protein-glutamate methylesterase/protein-glutamine glutaminase 3 {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=cheB3 {ECO:0000255|HAMAP-Rule:MF_00099}; OrderedLocusNames=Gmet_2418;
OS   Geobacter metallireducens (strain ATCC 53774 / DSM 7210 / GS-15).
OC   Bacteria; Proteobacteria; Deltaproteobacteria; Desulfuromonadales;
OC   Geobacteraceae; Geobacter.
OX   NCBI_TaxID=269799;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 53774 / DSM 7210 / GS-15;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T.,
RA   Hammon N., Israni S., Pitluck S., Di Bartolo G., Chain P., Schmutz J.,
RA   Larimer F., Land M., Kyrpides N., Ivanova N., Richardson P.;
RT   "Complete sequence of Geobacter metallireducens GS-15.";
RL   Submitted (OCT-2005) to the EMBL/GenBank/DDBJ databases.
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; CP000148; ABB32643.1; -; Genomic_DNA.
DR   RefSeq; WP_004512482.1; NC_007517.1.
DR   AlphaFoldDB; Q39SY1; -.
DR   SMR; Q39SY1; -.
DR   STRING; 269799.Gmet_2418; -.
DR   EnsemblBacteria; ABB32643; ABB32643; Gmet_2418.
DR   KEGG; gme:Gmet_2418; -.
DR   eggNOG; COG2201; Bacteria.
DR   HOGENOM; CLU_000445_51_0_7; -.
DR   OMA; HAMAQTT; -.
DR   OrthoDB; 1655418at2; -.
DR   Proteomes; UP000007073; 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..355
FT                   /note="Protein-glutamate methylesterase/protein-glutamine
FT                   glutaminase 3"
FT                   /id="PRO_0000264278"
FT   DOMAIN          5..122
FT                   /note="Response regulatory"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00099"
FT   DOMAIN          165..355
FT                   /note="CheB-type methylesterase"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00099"
FT   ACT_SITE        177
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00099"
FT   ACT_SITE        203
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00099"
FT   ACT_SITE        299
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   355 AA;  38381 MW;  FC0A22EA9DD4F139 CRC64;
     MKKIKVLIVD DSAVVRQTMA DILASDPHIE VMAPAADPFI AAERMREQVP DVITLDVEMP
     RMDGITFLKK IMSQHPIPVV MCSTLTESGS ETAVKALEYG AVEIIQKPKL GTKQFLEESR
     VRICDAVKAA SQARLRKITP RTGKEIAPKL SADVILEKPG SKAMIQTTEK VVVVGASTGG
     TEALRVFLEA LPADSPPIVI VQHMPEGFTR AFAQRLDGIC RITVKEAADN DTVMRGRALI
     APGNRHTLLK RSGARYYVEI KDGPLVSRHR PSVDVLFRSA ARYAGKNAVG VIMTGMGDDG
     ASGMKEMRDA GAVTIAQDEA TCIVFGMPNE AIKRGGADRV IPLDTIAREV LRLCG
 
 
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