ID D5EQF7_CORAD Unreviewed; 507 AA.
AC D5EQF7;
DT 15-JUN-2010, integrated into UniProtKB/TrEMBL.
DT 15-JUN-2010, sequence version 1.
DT 27-MAR-2024, entry version 72.
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 OrderedLocusNames=Caka_2756 {ECO:0000313|EMBL:ADE55771.1};
OS Coraliomargarita akajimensis (strain DSM 45221 / IAM 15411 / JCM 23193 /
OS KCTC 12865 / 04OKA010-24).
OC Bacteria; Verrucomicrobiota; Opitutae; Puniceicoccales;
OC Coraliomargaritaceae; Coraliomargarita.
OX NCBI_TaxID=583355 {ECO:0000313|EMBL:ADE55771.1, ECO:0000313|Proteomes:UP000000925};
RN [1] {ECO:0000313|EMBL:ADE55771.1, ECO:0000313|Proteomes:UP000000925}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 45221 / IAM 15411 / JCM 23193 / KCTC 12865
RC {ECO:0000313|Proteomes:UP000000925};
RX PubMed=21304713; DOI=10.4056/sigs.952166;
RA Mavromatis K., Abt B., Brambilla E., Lapidus A., Copeland A., Deshpande S.,
RA Nolan M., Lucas S., Tice H., Cheng J.F., Han C., Detter J.C., Woyke T.,
RA Goodwin L., Pitluck S., Held B., Brettin T., Tapia R., Ivanova N.,
RA Mikhailova N., Pati A., Liolios K., Chen A., Palaniappan K., Land M.,
RA Hauser L., Chang Y.J., Jeffries C.D., Rohde M., Goker M., Bristow J.,
RA Eisen J.A., Markowitz V., Hugenholtz P., Klenk H.P., Kyrpides N.C.;
RT "Complete genome sequence of Coraliomargarita akajimensis type strain
RT (04OKA010-24).";
RL Stand. Genomic Sci. 2:290-299(2010).
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}.
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DR EMBL; CP001998; ADE55771.1; -; Genomic_DNA.
DR RefSeq; WP_013044493.1; NC_014008.1.
DR AlphaFoldDB; D5EQF7; -.
DR STRING; 583355.Caka_2756; -.
DR KEGG; caa:Caka_2756; -.
DR eggNOG; COG1171; Bacteria.
DR HOGENOM; CLU_021152_6_2_0; -.
DR OrthoDB; 9811476at2; -.
DR UniPathway; UPA00047; UER00054.
DR Proteomes; UP000000925; Chromosome.
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; cd01562; Thr-dehyd; 1.
DR Gene3D; 3.40.50.1100; -; 2.
DR InterPro; IPR045865; ACT-like_dom_sf.
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; 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:UP000000925};
KW Repeat {ECO:0000256|ARBA:ARBA00022737}.
FT DOMAIN 424..496
FT /note="ACT-like"
FT /evidence="ECO:0000259|PROSITE:PS51672"
SQ SEQUENCE 507 AA; 55362 MW; F62199BF7BDDE0D5 CRC64;
MSSESISRTL RQEILFARRR IYEIGEATPL QQIDLADQTL FVKREDLSPI NAYKWRGAYN
RMAQLSDDEL SKGVVTASAG NHAQGVALAA KHLGTTATIF MPLATPRMKQ VAVKRHGGDS
VEIKLVGDTY DAASAAAKAC SEDEGRTYIH AYDDLAVMAG QGTLADEIVM SGQGSFDVAF
LQVGGGGMAA ATATWLKLHY PNIYIIGVEG TEQASMAAAI DAGHPVALDK VDIFCDGTAV
RKVGELTHPV CAEMVDEWMT VTNDEVSAGI QFLWEQVRAI PEPSGAMGVA AFLKRKDEIK
GKRILSVLCG ANMDFEQLAT IARRAAVGAA RRRFLRIGIP EQAGAMYGLL EALPDTVNIV
DFQYGKTDAS DATPVIGFDV DPMQYAVLTQ SLQQGGYTFS EVTADTDVAF RLIHYDAKLL
KRPYFITLEF HERPGALAEF LRAVSPHSNL CYFNYVYSGE RVGRALLGFE FDSQAAHQNF
PAVLDSAHHA YRAYETIDQE VLKRIVK
//
