ID J3EPX9_9LACO Unreviewed; 421 AA.
AC J3EPX9;
DT 03-OCT-2012, integrated into UniProtKB/TrEMBL.
DT 03-OCT-2012, sequence version 1.
DT 24-JAN-2024, entry version 46.
DE RecName: Full=L-threonine dehydratase {ECO:0000256|RuleBase:RU362012};
DE EC=4.3.1.19 {ECO:0000256|RuleBase:RU362012};
DE AltName: Full=Threonine deaminase {ECO:0000256|RuleBase:RU362012};
GN Name=ilvA {ECO:0000256|RuleBase:RU362012};
GN ORFNames=A11Y_149114 {ECO:0000313|EMBL:EJN55280.1};
OS Loigolactobacillus coryniformis subsp. coryniformis CECT 5711.
OC Bacteria; Bacillota; Bacilli; Lactobacillales; Lactobacillaceae;
OC Loigolactobacillus.
OX NCBI_TaxID=1185325 {ECO:0000313|EMBL:EJN55280.1, ECO:0000313|Proteomes:UP000007271};
RN [1] {ECO:0000313|EMBL:EJN55280.1, ECO:0000313|Proteomes:UP000007271}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CECT5711 {ECO:0000313|Proteomes:UP000007271};
RA Rodriguez J.M.;
RT "Complete Genome Sequence of Lactobacillus coryniformis CECT5711.";
RL Submitted (MAY-2012) to the EMBL/GenBank/DDBJ databases.
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.
CC {ECO:0000256|ARBA:ARBA00025527, ECO:0000256|RuleBase:RU362012}.
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 Evidence={ECO:0000256|ARBA:ARBA00001274,
CC ECO:0000256|RuleBase:RU362012};
CC -!- COFACTOR:
CC Name=pyridoxal 5'-phosphate; Xref=ChEBI:CHEBI:597326;
CC Evidence={ECO:0000256|ARBA:ARBA00001933,
CC ECO:0000256|RuleBase:RU362012};
CC -!- PATHWAY: Amino-acid biosynthesis; L-isoleucine biosynthesis; 2-
CC oxobutanoate from L-threonine: step 1/1.
CC {ECO:0000256|ARBA:ARBA00004810, ECO:0000256|RuleBase:RU362012}.
CC -!- SUBUNIT: Homotetramer. {ECO:0000256|ARBA:ARBA00011881,
CC ECO:0000256|RuleBase:RU362012}.
CC -!- SIMILARITY: Belongs to the serine/threonine dehydratase family.
CC {ECO:0000256|ARBA:ARBA00010869, ECO:0000256|RuleBase:RU362012}.
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:EJN55280.1}.
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DR EMBL; AKFP01000062; EJN55280.1; -; Genomic_DNA.
DR AlphaFoldDB; J3EPX9; -.
DR STRING; 1185325.A11Y_149114; -.
DR PATRIC; fig|1185325.3.peg.2108; -.
DR UniPathway; UPA00047; UER00054.
DR Proteomes; UP000007271; Unassembled WGS sequence.
DR GO; GO:0004794; F:L-threonine ammonia-lyase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0030170; F:pyridoxal phosphate binding; IEA:InterPro.
DR GO; GO:0009097; P:isoleucine biosynthetic process; IEA:UniProtKB-UniRule.
DR CDD; cd01562; Thr-dehyd; 1.
DR Gene3D; 3.40.50.1100; -; 2.
DR InterPro; IPR045865; ACT-like_dom_sf.
DR InterPro; IPR011820; IlvA.
DR InterPro; IPR000634; Ser/Thr_deHydtase_PyrdxlP-BS.
DR InterPro; IPR001721; TD_ACT-like.
DR InterPro; IPR038110; TD_ACT-like_sf.
DR InterPro; IPR001926; TrpB-like_PALP.
DR InterPro; IPR036052; TrpB-like_PALP_sf.
DR NCBIfam; TIGR02079; THD1; 1.
DR PANTHER; PTHR48078:SF11; THREONINE DEHYDRATASE, MITOCHONDRIAL; 1.
DR PANTHER; PTHR48078; THREONINE DEHYDRATASE, MITOCHONDRIAL-RELATED; 1.
DR Pfam; PF00291; PALP; 1.
DR Pfam; PF00585; Thr_dehydrat_C; 1.
DR SUPFAM; SSF55021; ACT-like; 1.
DR SUPFAM; SSF53686; Tryptophan synthase beta subunit-like PLP-dependent enzymes; 1.
DR PROSITE; PS51672; ACT_LIKE; 1.
DR PROSITE; PS00165; DEHYDRATASE_SER_THR; 1.
PE 3: Inferred from homology;
KW Amino-acid biosynthesis {ECO:0000256|RuleBase:RU362012};
KW Branched-chain amino acid biosynthesis {ECO:0000256|ARBA:ARBA00023304,
KW ECO:0000256|RuleBase:RU362012};
KW Isoleucine biosynthesis {ECO:0000256|ARBA:ARBA00022624,
KW ECO:0000256|RuleBase:RU362012};
KW Lyase {ECO:0000256|RuleBase:RU362012, ECO:0000313|EMBL:EJN55280.1};
KW Pyridoxal phosphate {ECO:0000256|ARBA:ARBA00022898,
KW ECO:0000256|RuleBase:RU362012};
KW Reference proteome {ECO:0000313|Proteomes:UP000007271}.
FT DOMAIN 338..412
FT /note="ACT-like"
FT /evidence="ECO:0000259|PROSITE:PS51672"
SQ SEQUENCE 421 AA; 45518 MW; 80A335410972283C CRC64;
MQQSALLTKT DVDKAYEVLR PIIRHTPLQY DVYLSQKYHC QVYLKREDLQ SVRSFKIRGA
YYAIADTPAE QRQRGVVCAS AGNHAQGVAW TCHQMQVPAT IFMPVTTPKQ KVSQVSFFGG
DDVTIKLVGD TFDAAAAAAE AFCKENEQTF IAPFNDKRTM AGQGTLAVET LADAAKAGIN
VDYMFAAIGG GGLISGVAAY VKGTNPATKV VGVEPAGAAS MKAALATGGP IALREMDKFV
DGAAVKKVGA LTYANVKEYV DDVIAVPEGQ VCSAILDLYS KEAIVAEPAG ALSVAALAAQ
QEQIAGKTVV CVVSGGNNDI NRMQEIEERS LIFEGYQHYF IVNFPQRPGA LREVVNEILS
PDDDITKFEY TKKVNRGEGP VLIGVRLGDR ATLPGLLERL SQFDPRYINL KDNQMLYTMM
V
//
