ID D7GII6_PROFC Unreviewed; 424 AA.
AC D7GII6;
DT 10-AUG-2010, integrated into UniProtKB/TrEMBL.
DT 10-AUG-2010, sequence version 1.
DT 27-MAR-2024, entry version 67.
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=PFREUD_03750 {ECO:0000313|EMBL:CBL55908.1};
OS Propionibacterium freudenreichii subsp. shermanii (strain ATCC 9614 / DSM
OS 4902 / CIP 103027 / NCIMB 8099 / CIRM-BIA1).
OC Bacteria; Actinomycetota; Actinomycetes; Propionibacteriales;
OC Propionibacteriaceae; Propionibacterium.
OX NCBI_TaxID=754252 {ECO:0000313|EMBL:CBL55908.1, ECO:0000313|Proteomes:UP000000936};
RN [1] {ECO:0000313|EMBL:CBL55908.1, ECO:0000313|Proteomes:UP000000936}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 9614 / DSM 4902 / CIP 103027 / NCIMB 8099 / CIRM-BIA1
RC {ECO:0000313|Proteomes:UP000000936};
RX PubMed=20668525; DOI=10.1371/journal.pone.0011748;
RA Falentin H., Deutsch S.M., Jan G., Loux V., Thierry A., Parayre S.,
RA Maillard M.B., Dherbecourt J., Cousin F.J., Jardin J., Siguier P.,
RA Couloux A., Barbe V., Vacherie B., Wincker P., Gibrat J.F., Gaillardin C.,
RA Lortal S.;
RT "The complete genome of Propionibacterium freudenreichii CIRM-BIA1, a hardy
RT actinobacterium with food and probiotic applications.";
RL PLoS ONE 5:E11748-E11748(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|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}.
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DR EMBL; FN806773; CBL55908.1; -; Genomic_DNA.
DR RefSeq; WP_013160302.1; NC_014215.1.
DR AlphaFoldDB; D7GII6; -.
DR STRING; 754252.PFREUD_03750; -.
DR KEGG; pfr:PFREUD_03750; -.
DR eggNOG; COG1171; Bacteria.
DR HOGENOM; CLU_021152_4_2_11; -.
DR UniPathway; UPA00047; UER00054.
DR Proteomes; UP000000936; Chromosome.
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 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};
KW Lyase {ECO:0000256|RuleBase:RU362012, ECO:0000313|EMBL:CBL55908.1};
KW Pyridoxal phosphate {ECO:0000256|ARBA:ARBA00022898,
KW ECO:0000256|RuleBase:RU362012};
KW Reference proteome {ECO:0000313|Proteomes:UP000000936}.
FT DOMAIN 341..415
FT /note="ACT-like"
FT /evidence="ECO:0000259|PROSITE:PS51672"
SQ SEQUENCE 424 AA; 45447 MW; 3AE587942A8EC284 CRC64;
MTTTEVSTLA HLVDQAAEGL AGVARVTPLQ YNERISSTSG CRVWLKREDL QPVRSYKLRG
AYTFISKLSD DEKRAGVICA SAGNHGQGVA WACARLGITG TVHVPSTTPR QKRDRIRFFG
GDHVRLVVGG DTYDDAARAA QVEADRTGAT MVPAFDDPLI ASGQGTVARE LVEQLGHAPD
VLVVPVGGGG LLSGCGAWMR ENHPETRIIA VEPAGAAGLA AAMDAGRPVR LDHIDSFVDG
AAVARVGDFT FKIARQLAPD LIAIPEGQVC TEMLSMYQVD GIIAEPAGAL AASALSVHPM
DTTLGIDPSQ EIAIIVSGGN NDVSRYAEVV ERSGVHEGRR RYFLVNFPQE PGALRRFLNE
VLGPDDDIIV FDYTKHSNRD TGPALVGIEL GDPTNFAELW TRMEESPLNV EVLEPDTAIY
RMLV
//
