ID   ILVA_MYCBO              Reviewed;         429 AA.
AC   P66898; A0A1R3XYP5; Q10766; X2BII6;
DT   11-OCT-2004, integrated into UniProtKB/Swiss-Prot.
DT   11-OCT-2004, sequence version 1.
DT   03-AUG-2022, entry version 101.
DE   RecName: Full=L-threonine dehydratase biosynthetic IlvA;
DE            EC=4.3.1.19;
DE   AltName: Full=Threonine deaminase;
GN   Name=ilvA; OrderedLocusNames=BQ2027_MB1585;
OS   Mycobacterium bovis (strain ATCC BAA-935 / AF2122/97).
OC   Bacteria; Actinobacteria; Corynebacteriales; Mycobacteriaceae;
OC   Mycobacterium; Mycobacterium tuberculosis complex.
OX   NCBI_TaxID=233413;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-935 / AF2122/97;
RX   PubMed=12788972; DOI=10.1073/pnas.1130426100;
RA   Garnier T., Eiglmeier K., Camus J.-C., Medina N., Mansoor H., Pryor M.,
RA   Duthoy S., Grondin S., Lacroix C., Monsempe C., Simon S., Harris B.,
RA   Atkin R., Doggett J., Mayes R., Keating L., Wheeler P.R., Parkhill J.,
RA   Barrell B.G., Cole S.T., Gordon S.V., Hewinson R.G.;
RT   "The complete genome sequence of Mycobacterium bovis.";
RL   Proc. Natl. Acad. Sci. U.S.A. 100:7877-7882(2003).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA], AND GENOME REANNOTATION.
RC   STRAIN=ATCC BAA-935 / AF2122/97;
RX   PubMed=28385856; DOI=10.1128/genomea.00157-17;
RA   Malone K.M., Farrell D., Stuber T.P., Schubert O.T., Aebersold R.,
RA   Robbe-Austerman S., Gordon S.V.;
RT   "Updated reference genome sequence and annotation of Mycobacterium bovis
RT   AF2122/97.";
RL   Genome Announc. 5:E00157-E00157(2017).
CC   -!- FUNCTION: Catalyzes the anaerobic formation of alpha-ketobutyrate and
CC       ammonia from threonine in a two-step reaction. The first step involved
CC       a dehydration of threonine and a production of enamine intermediates
CC       (aminocrotonate), which tautomerizes to its imine form (iminobutyrate).
CC       Both intermediates are unstable and short-lived. The second step is the
CC       nonenzymatic hydrolysis of the enamine/imine intermediates to form 2-
CC       ketobutyrate and free ammonia. In the low water environment of the
CC       cell, the second step is accelerated by RidA (By similarity).
CC       {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=L-threonine = 2-oxobutanoate + NH4(+); Xref=Rhea:RHEA:22108,
CC         ChEBI:CHEBI:16763, ChEBI:CHEBI:28938, ChEBI:CHEBI:57926; EC=4.3.1.19;
CC   -!- COFACTOR:
CC       Name=pyridoxal 5'-phosphate; Xref=ChEBI:CHEBI:597326;
CC         Evidence={ECO:0000250};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-isoleucine biosynthesis; 2-
CC       oxobutanoate from L-threonine: step 1/1.
CC   -!- SUBUNIT: Homotetramer. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the serine/threonine dehydratase family.
CC       {ECO:0000305}.
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DR   EMBL; LT708304; SIU00188.1; -; Genomic_DNA.
DR   RefSeq; NP_855237.1; NC_002945.3.
DR   RefSeq; WP_003407781.1; NC_002945.4.
DR   AlphaFoldDB; P66898; -.
DR   SMR; P66898; -.
DR   EnsemblBacteria; SIU00188; SIU00188; BQ2027_MB1585.
DR   GeneID; 45425543; -.
DR   PATRIC; fig|233413.5.peg.1732; -.
DR   OMA; VNFPQRA; -.
DR   UniPathway; UPA00047; UER00054.
DR   Proteomes; UP000001419; Chromosome.
DR   GO; GO:0004794; F:L-threonine ammonia-lyase activity; IEA:UniProtKB-EC.
DR   GO; GO:0030170; F:pyridoxal phosphate binding; IEA:InterPro.
DR   GO; GO:0009097; P:isoleucine biosynthetic process; IEA:UniProtKB-UniPathway.
DR   GO; GO:0006566; P:threonine metabolic process; ISS:UniProtKB.
DR   Gene3D; 3.40.1020.10; -; 1.
DR   Gene3D; 3.40.50.1100; -; 2.
DR   InterPro; IPR011820; IlvA.
DR   InterPro; IPR001926; PLP-dep.
DR   InterPro; IPR000634; Ser/Thr_deHydtase_PyrdxlP-BS.
DR   InterPro; IPR001721; TD_ACT-like.
DR   InterPro; IPR038110; TD_ACT-like_sf.
DR   InterPro; IPR036052; Trypto_synt_PLP_dependent.
DR   Pfam; PF00291; PALP; 1.
DR   Pfam; PF00585; Thr_dehydrat_C; 1.
DR   SUPFAM; SSF53686; SSF53686; 1.
DR   TIGRFAMs; TIGR02079; THD1; 1.
DR   PROSITE; PS51672; ACT_LIKE; 1.
DR   PROSITE; PS00165; DEHYDRATASE_SER_THR; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Branched-chain amino acid biosynthesis;
KW   Isoleucine biosynthesis; Lyase; Pyridoxal phosphate.
FT   CHAIN           1..429
FT                   /note="L-threonine dehydratase biosynthetic IlvA"
FT                   /id="PRO_0000185578"
FT   DOMAIN          346..420
FT                   /note="ACT-like"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01008"
FT   BINDING         93
FT                   /ligand="pyridoxal 5'-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:597326"
FT                   /evidence="ECO:0000250"
FT   BINDING         196..200
FT                   /ligand="pyridoxal 5'-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:597326"
FT                   /evidence="ECO:0000250"
FT   BINDING         322
FT                   /ligand="pyridoxal 5'-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:597326"
FT                   /evidence="ECO:0000250"
FT   MOD_RES         66
FT                   /note="N6-(pyridoxal phosphate)lysine"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   429 AA;  45041 MW;  D0C761EC258AC521 CRC64;
     MSAELSQSPS SSPLFSLSGA DIDRAAKRIA PVVTPTPLQP SDRLSAITGA TVYLKREDLQ
     TVRSYKLRGA YNLLVQLSDE ELAAGVVCSS AGNHAQGFAY ACRCLGVHGR VYVPAKTPKQ
     KRDRIRYHGG EFIDLIVGGS TYDLAAAAAL EDVERTGATL VPPFDDLRTI AGQGTIAVEV
     LGQLEDEPDL VVVPVGGGGC IAGITTYLAE RTTNTAVLGV EPAGAAAMMA ALAAGEPVTL
     DHVDQFVDGA AVNRAGTLTY AALAAAGDMV SLTTVDEGAV CTAMLDLYQN EGIIAEPAGA
     LSVAGLLEAD IEPGSTVVCL ISGGNNDVSR YGEVLERSLV HLGLKHYFLV DFPQEPGALR
     RFLDDVLGPN DDITLFEYVK RNNRETGEAL VGIELGSAAD LDGLLARMRA TDIHVEALEP
     GSPAYRYLL