ID U7MTD9_9CORY Unreviewed; 433 AA.
AC U7MTD9;
DT 22-JAN-2014, integrated into UniProtKB/TrEMBL.
DT 22-JAN-2014, sequence version 1.
DT 24-JAN-2024, entry version 49.
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=HMPREF1290_01379 {ECO:0000313|EMBL:ERS73379.1};
OS Corynebacterium sp. KPL1989.
OC Bacteria; Actinomycetota; Actinomycetes; Mycobacteriales;
OC Corynebacteriaceae; Corynebacterium.
OX NCBI_TaxID=1203622 {ECO:0000313|EMBL:ERS73379.1, ECO:0000313|Proteomes:UP000017102};
RN [1] {ECO:0000313|EMBL:ERS73379.1, ECO:0000313|Proteomes:UP000017102}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=KPL1989 {ECO:0000313|EMBL:ERS73379.1,
RC ECO:0000313|Proteomes:UP000017102};
RG The Broad Institute Genomics Platform;
RA Earl A., Ward D., Feldgarden M., Gevers D., Jacobson B., Goguen K.,
RA Pagano E., Lemon K.P., Young S.K., Zeng Q., Gargeya S., Fitzgerald M.,
RA Abouelleil A., Alvarado L., Berlin A.M., Chapman S.B., Gainer-Dewar J.,
RA Goldberg J., Gnerre S., Griggs A., Gujja S., Hansen M., Howarth C.,
RA Imamovic A., Ireland A., Larimer J., McCowan C., Murphy C., Pearson M.,
RA Poon T.W., Priest M., Roberts A., Saif S., Shea T., Sykes S., Wortman J.,
RA Nusbaum C., Birren B.;
RT "The Genome Sequence of Corynebacterium sp. KPL1989.";
RL Submitted (OCT-2013) 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:ERS73379.1}.
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DR EMBL; AXLR01000004; ERS73379.1; -; Genomic_DNA.
DR RefSeq; WP_023019253.1; NZ_KI515717.1.
DR AlphaFoldDB; U7MTD9; -.
DR PATRIC; fig|1203622.3.peg.1357; -.
DR eggNOG; COG1171; Bacteria.
DR HOGENOM; CLU_021152_4_2_11; -.
DR UniPathway; UPA00047; UER00054.
DR Proteomes; UP000017102; 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; 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; 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}; Lyase {ECO:0000256|RuleBase:RU362012};
KW Pyridoxal phosphate {ECO:0000256|ARBA:ARBA00022898,
KW ECO:0000256|RuleBase:RU362012};
KW Reference proteome {ECO:0000313|Proteomes:UP000017102}.
FT DOMAIN 349..423
FT /note="ACT-like"
FT /evidence="ECO:0000259|PROSITE:PS51672"
SQ SEQUENCE 433 AA; 46193 MW; 944F6278621C4F60 CRC64;
MTTPQIAPAS PDNFEPVRAA DIQLAQSRIS SVIAPTPLQY CPRLSQETGA EIFLKREDLQ
DVRSYKIRGA YYSIAKLSQE EREAGIVAAS AGNHAQGVAY ACRTMGIKGR IFVPTKTPKQ
KRNRIKVHGG DAIELVVTGS NFDEAAAAAR EEATKHGSTV IEPFDARDTI VGQGTVAAEI
LSQLSARGHS LDTVVVPVGG GGLLSGITSY FADMAPNAAL VAAEPLGAAS LDAALTAGEP
VTLETVDAFV DGAAVKRIGA KPFHIINANR ERIQNLQVAE GAVCTAQLSL YQDEGIIAEP
AGALSVAALE KIDIAPGSVV VCIISGGNND VLRYAEIMER SLVDRGLKHY FLVNFLQEPG
QLRHFLMEIL GPDDDITLFE YLKRNNRETG AALVGLELGS ATDLDPLLER MAASSIECQR
LLPGTPEYDY LVK
//
