ID A0A2A9CGT4_9BACI Unreviewed; 418 AA.
AC A0A2A9CGT4;
DT 20-DEC-2017, integrated into UniProtKB/TrEMBL.
DT 20-DEC-2017, sequence version 1.
DT 24-JAN-2024, entry version 24.
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=ATG70_1527 {ECO:0000313|EMBL:PFG13325.1};
OS Bacillus sp. es.036.
OC Bacteria; Bacillota; Bacilli; Bacillales; Bacillaceae; Bacillus.
OX NCBI_TaxID=1761764 {ECO:0000313|EMBL:PFG13325.1, ECO:0000313|Proteomes:UP000222003};
RN [1] {ECO:0000313|EMBL:PFG13325.1, ECO:0000313|Proteomes:UP000222003}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=es.036 {ECO:0000313|Proteomes:UP000222003};
RA Fredrickson J.;
RT "Microbial Interactions in Extremophilic Mat Communities.";
RL Submitted (OCT-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|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:PFG13325.1}.
CC ---------------------------------------------------------------------------
CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC ---------------------------------------------------------------------------
DR EMBL; PDIZ01000001; PFG13325.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A2A9CGT4; -.
DR OrthoDB; 9811476at2; -.
DR UniPathway; UPA00047; UER00054.
DR Proteomes; UP000222003; Unassembled WGS sequence.
DR GO; GO:0004794; F:L-threonine ammonia-lyase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0009097; P:isoleucine biosynthetic process; IEA:UniProtKB-UniRule.
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; IPR011820; IlvA.
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.
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:PFG13325.1};
KW Pyridoxal phosphate {ECO:0000256|ARBA:ARBA00022898,
KW ECO:0000256|RuleBase:RU362012}.
FT DOMAIN 335..409
FT /note="ACT-like"
FT /evidence="ECO:0000259|PROSITE:PS51672"
SQ SEQUENCE 418 AA; 46512 MW; BCF7B17BEDE9FE2A CRC64;
MSKTISKVQV EDIIIANQVL KEVVVHTPLQ RNEILSDRYN CNVYLKREDL QNIRSFKIRG
AYNLIQSLTM EEKENGIVCA SAGNHAQGVA FSCKTLGIQG HIFMPATTPR QKISQVELFG
GSYVEVILTG DTFDDSFHTA KEFCNKQDKT FIHPFDDYRT IAGQGTVGLE IMNDIDEVDY
VMLGIGGGGL ASGVGSYIKS ISPDTKIVGI EPEGAAGMKR SIEHDSVVPL DFIDKFVDGA
AVKQVGKLTL DICKHLLDDV VLVPEGKICT TILELYNQNA IVAEPAGALS IASLDFYKDQ
IKGKNVVCVI SGGNNDINRM QEIQERSLIY EGLKHYFIVH FPQRAGALKE FMADVLGPTD
DITRFEYTKK NNRDRGPVLA GIELKHKEDY EPLIERLNRK GFSYIEINKD QDLFNLLI
//
