ID   D3H0W6_ECO44            Unreviewed;       466 AA.
AC   D3H0W6;
DT   23-MAR-2010, integrated into UniProtKB/TrEMBL.
DT   23-MAR-2010, sequence version 1.
DT   27-MAR-2024, entry version 77.
DE   RecName: Full=Glutamate decarboxylase {ECO:0000256|ARBA:ARBA00012421, ECO:0000256|RuleBase:RU361171};
DE            EC=4.1.1.15 {ECO:0000256|ARBA:ARBA00012421, ECO:0000256|RuleBase:RU361171};
GN   Name=gadA {ECO:0000313|EMBL:CBG36637.1};
GN   OrderedLocusNames=EC042_3812 {ECO:0000313|EMBL:CBG36637.1};
OS   Escherichia coli O44:H18 (strain 042 / EAEC).
OC   Bacteria; Pseudomonadota; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; Escherichia.
OX   NCBI_TaxID=216592 {ECO:0000313|EMBL:CBG36637.1, ECO:0000313|Proteomes:UP000001407};
RN   [1] {ECO:0000313|EMBL:CBG36637.1, ECO:0000313|Proteomes:UP000001407}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=042 / EAEC {ECO:0000313|Proteomes:UP000001407};
RX   PubMed=20098708; DOI=10.1371/journal.pone.0008801;
RA   Chaudhuri R.R., Sebaihia M., Hobman J.L., Webber M.A., Leyton D.L.,
RA   Goldberg M.D., Cunningham A.F., Scott-Tucker A., Ferguson P.R.,
RA   Thomas C.M., Frankel G., Tang C.M., Dudley E.G., Roberts I.S., Rasko D.A.,
RA   Pallen M.J., Parkhill J., Nataro J.P., Thomson N.R., Henderson I.R.;
RT   "Complete genome sequence and comparative metabolic profiling of the
RT   prototypical enteroaggregative Escherichia coli strain 042.";
RL   PLoS ONE 5:E8801-E8801(2010).
CC   -!- FUNCTION: Converts glutamate to gamma-aminobutyrate (GABA), consuming
CC       one intracellular proton in the reaction. The gad system helps to
CC       maintain a near-neutral intracellular pH when cells are exposed to
CC       extremely acidic conditions. The ability to survive transit through the
CC       acidic conditions of the stomach is essential for successful
CC       colonization of the mammalian host by commensal and pathogenic
CC       bacteria. {ECO:0000256|ARBA:ARBA00024984}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=H(+) + L-glutamate = 4-aminobutanoate + CO2;
CC         Xref=Rhea:RHEA:17785, ChEBI:CHEBI:15378, ChEBI:CHEBI:16526,
CC         ChEBI:CHEBI:29985, ChEBI:CHEBI:59888; EC=4.1.1.15;
CC         Evidence={ECO:0000256|ARBA:ARBA00000018,
CC         ECO:0000256|RuleBase:RU361171};
CC   -!- COFACTOR:
CC       Name=pyridoxal 5'-phosphate; Xref=ChEBI:CHEBI:597326;
CC         Evidence={ECO:0000256|ARBA:ARBA00001933,
CC         ECO:0000256|PIRSR:PIRSR602129-50, ECO:0000256|RuleBase:RU000382};
CC   -!- SIMILARITY: Belongs to the group II decarboxylase family.
CC       {ECO:0000256|RuleBase:RU000382}.
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DR   EMBL; FN554766; CBG36637.1; -; Genomic_DNA.
DR   RefSeq; WP_000372259.1; NC_017626.1.
DR   AlphaFoldDB; D3H0W6; -.
DR   KEGG; elo:EC042_3812; -.
DR   PATRIC; fig|216592.3.peg.3961; -.
DR   HOGENOM; CLU_019582_0_0_6; -.
DR   Proteomes; UP000001407; Chromosome.
DR   GO; GO:0004351; F:glutamate decarboxylase activity; IEA:UniProtKB-EC.
DR   GO; GO:0030170; F:pyridoxal phosphate binding; IEA:InterPro.
DR   GO; GO:0006536; P:glutamate metabolic process; IEA:InterPro.
DR   CDD; cd06450; DOPA_deC_like; 1.
DR   Gene3D; 3.90.1150.160; -; 1.
DR   Gene3D; 4.10.280.50; -; 1.
DR   Gene3D; 3.40.640.10; Type I PLP-dependent aspartate aminotransferase-like (Major domain); 1.
DR   InterPro; IPR010107; Glutamate_decarboxylase.
DR   InterPro; IPR002129; PyrdxlP-dep_de-COase.
DR   InterPro; IPR015424; PyrdxlP-dep_Trfase.
DR   InterPro; IPR015421; PyrdxlP-dep_Trfase_major.
DR   InterPro; IPR021115; Pyridoxal-P_BS.
DR   NCBIfam; TIGR01788; Glu-decarb-GAD; 1.
DR   PANTHER; PTHR43321; GLUTAMATE DECARBOXYLASE; 1.
DR   PANTHER; PTHR43321:SF3; GLUTAMATE DECARBOXYLASE; 1.
DR   Pfam; PF00282; Pyridoxal_deC; 1.
DR   SUPFAM; SSF53383; PLP-dependent transferases; 1.
DR   PROSITE; PS00392; DDC_GAD_HDC_YDC; 1.
PE   3: Inferred from homology;
KW   Decarboxylase {ECO:0000256|RuleBase:RU361171};
KW   Lyase {ECO:0000256|ARBA:ARBA00023239, ECO:0000256|RuleBase:RU000382};
KW   Pyridoxal phosphate {ECO:0000256|PIRSR:PIRSR602129-50,
KW   ECO:0000256|RuleBase:RU000382}.
FT   MOD_RES         276
FT                   /note="N6-(pyridoxal phosphate)lysine"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR602129-50"
SQ   SEQUENCE   466 AA;  52684 MW;  80BF814512F178C2 CRC64;
     MDQKLLTDFR SELLDSRFGA KAISTIAESK RFPLHEMRDD VAFQIINDEL YLDGNARQNL
     ATFCQTWDDE NVHKLMDLSI NKNWIDKEEY PQSAAIDLRC VNMVADLWHA PAPKNGQAVG
     TNTIGSSEAC MLGGMAMKWR WRKRMEAAGK PTNKPNLVCG PVQICWHKFA RYWDVELREI
     PMRPGQLFMD PKRMIEACDE NTIGVVPTFG VTYTGNYEFP QPLHDALDKF QADTGIDIDM
     HIDAASGGFL APFVAPDIVW DFRLPRVKSI SASGHKFGLA PLGCGWVIWR DEEALPQELV
     FNVDYLGGQI GTFAINFSRP AGQVIAQYYE FLRLGREGYT KVQNASYQVA AYLADEIAKL
     GPYEFICTGR PDEGIPAVCF KLKDGEDPGY TLYDLSERLR LRGWQVPAFT LGGEATDIVV
     MRIMCRRGFE MDFAELLLED YKASLKYLSD HPKLQGIAQQ NSFKHT
//