ID A0A1T1I6G6_9PSED Unreviewed; 504 AA.
AC A0A1T1I6G6;
DT 10-MAY-2017, integrated into UniProtKB/TrEMBL.
DT 10-MAY-2017, sequence version 1.
DT 24-JAN-2024, entry version 29.
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=MF4836_12515 {ECO:0000313|EMBL:OOV97515.1};
OS Pseudomonas sp. MF4836.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Pseudomonadales;
OC Pseudomonadaceae; Pseudomonas.
OX NCBI_TaxID=1960827 {ECO:0000313|EMBL:OOV97515.1, ECO:0000313|Proteomes:UP000190183};
RN [1] {ECO:0000313|Proteomes:UP000190183}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=MF4836 {ECO:0000313|Proteomes:UP000190183};
RA Fagerlund A.;
RT "Genome sequencing of bacteria from food industry.";
RL Submitted (FEB-2017) 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|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:OOV97515.1}.
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DR EMBL; MVOL01000004; OOV97515.1; -; Genomic_DNA.
DR RefSeq; WP_020295871.1; NZ_MVOL01000004.1.
DR AlphaFoldDB; A0A1T1I6G6; -.
DR STRING; 1960827.MF4836_12515; -.
DR UniPathway; UPA00047; UER00054.
DR Proteomes; UP000190183; 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; cd04906; ACT_ThrD-I_1; 1.
DR CDD; cd04907; ACT_ThrD-I_2; 1.
DR CDD; cd01562; Thr-dehyd; 1.
DR Gene3D; 3.40.50.1100; -; 2.
DR InterPro; IPR045865; ACT-like_dom_sf.
DR InterPro; IPR000634; Ser/Thr_deHydtase_PyrdxlP-BS.
DR InterPro; IPR001721; TD_ACT-like.
DR InterPro; IPR038110; TD_ACT-like_sf.
DR InterPro; IPR005787; Thr_deHydtase_biosynth.
DR InterPro; IPR001926; TrpB-like_PALP.
DR InterPro; IPR036052; TrpB-like_PALP_sf.
DR NCBIfam; TIGR01124; ilvA_2Cterm; 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; 2.
DR SUPFAM; SSF55021; ACT-like; 2.
DR SUPFAM; SSF53686; Tryptophan synthase beta subunit-like PLP-dependent enzymes; 1.
DR PROSITE; PS51672; ACT_LIKE; 2.
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}; Repeat {ECO:0000256|ARBA:ARBA00022737}.
FT DOMAIN 329..401
FT /note="ACT-like"
FT /evidence="ECO:0000259|PROSITE:PS51672"
FT DOMAIN 424..495
FT /note="ACT-like"
FT /evidence="ECO:0000259|PROSITE:PS51672"
SQ SEQUENCE 504 AA; 55043 MW; B2CC04EE44358B39 CRC64;
MLEQYVKKIL TSRVYDVAVE TPLQTARQLS ERLGNQVWLK REDLQPVFSF KIRGAYNKLT
QLSEAERARG VVTASAGNHA QGLALAAKVL GVKATIVMPK TTPEIKVEGV RSRGGKVVLH
GDSFPEALAY SLKLVDEKGY VYIHPYDDPH TIAGQGTVAM EILRQHPGRL DAIFVPVGGG
GLIAGIAAYV KYLRPEIKII GVEPDDSNCL QAAMAAGERV VLPTVGIFAD GVAVAQIGQH
TFDICKDYVD EVITVSTDEI CAAIKDIYDD TRSITEPAGA LGVAGIKKYV EQRGITGQTL
VAIDSGANVN FDRLRHVAER AELGEGREAI IAVTIPEKPG SFKAFCEAIG KRQITEFNYR
YNTGSEAHIF VGVQTHPEND PRSALIASLT EQGFPVIDLT DNELAKLHIR YMVGGHAEKV
SDEVVFRFEF PERPGALFNF LHKLGGRWNI SMFHYRNHGA ADGRVVAGLQ VPAAERHLVP
AALAQIGYPY WDESDNPAYQ LFLG
//
