ID A3IYC0_9CHRO Unreviewed; 363 AA.
AC A3IYC0;
DT 03-APR-2007, integrated into UniProtKB/TrEMBL.
DT 03-APR-2007, sequence version 1.
DT 24-JAN-2024, entry version 84.
DE RecName: Full=Protein-glutamate methylesterase/protein-glutamine glutaminase {ECO:0000256|HAMAP-Rule:MF_00099};
DE EC=3.1.1.61 {ECO:0000256|HAMAP-Rule:MF_00099};
DE EC=3.5.1.44 {ECO:0000256|HAMAP-Rule:MF_00099};
GN Name=cheB {ECO:0000256|HAMAP-Rule:MF_00099};
GN ORFNames=CY0110_06539 {ECO:0000313|EMBL:EAZ88528.1};
OS Crocosphaera chwakensis CCY0110.
OC Bacteria; Cyanobacteriota; Cyanophyceae; Oscillatoriophycideae;
OC Chroococcales; Aphanothecaceae; Crocosphaera; Crocosphaera chwakensis.
OX NCBI_TaxID=391612 {ECO:0000313|EMBL:EAZ88528.1, ECO:0000313|Proteomes:UP000003781};
RN [1] {ECO:0000313|EMBL:EAZ88528.1, ECO:0000313|Proteomes:UP000003781}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CCY0110 {ECO:0000313|EMBL:EAZ88528.1,
RC ECO:0000313|Proteomes:UP000003781};
RA Stal L., Ferriera S., Johnson J., Kravitz S., Beeson K., Sutton G.,
RA Rogers Y.-H., Friedman R., Frazier M., Venter J.C.;
RL Submitted (MAR-2007) 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:0000256|HAMAP-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:0000256|HAMAP-
CC 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;
CC Evidence={ECO:0000256|ARBA:ARBA00000941, ECO:0000256|HAMAP-
CC Rule:MF_00099};
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_00099}.
CC -!- DOMAIN: Contains a C-terminal catalytic domain, and an N-terminal
CC region which modulates catalytic activity. {ECO:0000256|HAMAP-
CC Rule:MF_00099}.
CC -!- PTM: Phosphorylated by CheA. Phosphorylation of the N-terminal
CC regulatory domain activates the methylesterase activity.
CC {ECO:0000256|HAMAP-Rule:MF_00099}.
CC -!- SIMILARITY: Belongs to the CheB family. {ECO:0000256|HAMAP-
CC Rule:MF_00099}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:EAZ88528.1}.
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DR EMBL; AAXW01000078; EAZ88528.1; -; Genomic_DNA.
DR RefSeq; WP_008278383.1; NZ_AAXW01000078.1.
DR AlphaFoldDB; A3IYC0; -.
DR eggNOG; COG2201; Bacteria.
DR OrthoDB; 9793421at2; -.
DR Proteomes; UP000003781; Unassembled WGS sequence.
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 CDD; cd16432; CheB_Rec; 1.
DR CDD; cd17541; REC_CheB-like; 1.
DR Gene3D; 3.40.50.2300; -; 1.
DR Gene3D; 3.40.50.180; Methylesterase CheB, C-terminal domain; 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 PANTHER; PTHR42872; PROTEIN-GLUTAMATE METHYLESTERASE/PROTEIN-GLUTAMINE GLUTAMINASE; 1.
DR PANTHER; PTHR42872:SF6; PROTEIN-GLUTAMATE METHYLESTERASE/PROTEIN-GLUTAMINE GLUTAMINASE; 1.
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; CheY-like; 1.
DR SUPFAM; SSF52738; Methylesterase CheB, C-terminal domain; 1.
DR PROSITE; PS50122; CHEB; 1.
DR PROSITE; PS50110; RESPONSE_REGULATORY; 1.
PE 3: Inferred from homology;
KW Chemotaxis {ECO:0000256|HAMAP-Rule:MF_00099, ECO:0000256|PROSITE-
KW ProRule:PRU00050};
KW Cytoplasm {ECO:0000256|ARBA:ARBA00022490, ECO:0000256|HAMAP-Rule:MF_00099};
KW Hydrolase {ECO:0000256|ARBA:ARBA00022801, ECO:0000256|HAMAP-Rule:MF_00099};
KW Phosphoprotein {ECO:0000256|HAMAP-Rule:MF_00099, ECO:0000256|PROSITE-
KW ProRule:PRU00169}.
FT DOMAIN 7..125
FT /note="Response regulatory"
FT /evidence="ECO:0000259|PROSITE:PS50110"
FT DOMAIN 172..352
FT /note="CheB-type methylesterase"
FT /evidence="ECO:0000259|PROSITE:PS50122"
FT ACT_SITE 184
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00099,
FT ECO:0000256|PROSITE-ProRule:PRU00050"
FT ACT_SITE 211
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00099,
FT ECO:0000256|PROSITE-ProRule:PRU00050"
FT ACT_SITE 304
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00099,
FT ECO:0000256|PROSITE-ProRule:PRU00050"
FT MOD_RES 58
FT /note="4-aspartylphosphate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00099,
FT ECO:0000256|PROSITE-ProRule:PRU00169"
SQ SEQUENCE 363 AA; 39047 MW; 48FAFB8CBBF9EACE CRC64;
MTKPPIKVLL VDDSPVALKI LQRLIDSSSD VQVIATASNG QEALELIPKV NPNVICTDFH
MKGMDGLALT QKVMTKYPIP ILIISNSVQE DDPGNIFKLL QAGAIDVFPK PITGQDSDYE
RIKNLLITKI KVLSGVSVFT KSFSQASQPQ LKTLKSVPNS SLNSINPTVD NHRSPIKVVT
IGASTGGPKA LHQIIAPLPK NFPVPIICTQ HISPGFLEGL VSWLESESQL KIKIAQAGEY
PVPGTVYFAP DNYHLGLNSQ GQFGHLNSAP VDGHRPSVTA MFESVAKFYR QGTVGVLLTG
MGRDGARGMN AIAQAGGINI AQDEKSCTVF GMPKEAIALG VVNYVLPLQE IAPFLNKLQR
VKV
//