ID   LEU1_THEFY              Reviewed;         568 AA.
AC   Q47RM9;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   13-SEP-2005, sequence version 1.
DT   03-AUG-2022, entry version 118.
DE   RecName: Full=2-isopropylmalate synthase {ECO:0000255|HAMAP-Rule:MF_00572};
DE            EC=2.3.3.13 {ECO:0000255|HAMAP-Rule:MF_00572};
DE   AltName: Full=Alpha-IPM synthase {ECO:0000255|HAMAP-Rule:MF_00572};
DE   AltName: Full=Alpha-isopropylmalate synthase {ECO:0000255|HAMAP-Rule:MF_00572};
GN   Name=leuA {ECO:0000255|HAMAP-Rule:MF_00572}; OrderedLocusNames=Tfu_0850;
OS   Thermobifida fusca (strain YX).
OC   Bacteria; Actinobacteria; Streptosporangiales; Nocardiopsaceae;
OC   Thermobifida.
OX   NCBI_TaxID=269800;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=YX;
RX   PubMed=17209016; DOI=10.1128/jb.01899-06;
RA   Lykidis A., Mavromatis K., Ivanova N., Anderson I., Land M., DiBartolo G.,
RA   Martinez M., Lapidus A., Lucas S., Copeland A., Richardson P., Wilson D.B.,
RA   Kyrpides N.;
RT   "Genome sequence and analysis of the soil cellulolytic actinomycete
RT   Thermobifida fusca YX.";
RL   J. Bacteriol. 189:2477-2486(2007).
CC   -!- FUNCTION: Catalyzes the condensation of the acetyl group of acetyl-CoA
CC       with 3-methyl-2-oxobutanoate (2-oxoisovalerate) to form 3-carboxy-3-
CC       hydroxy-4-methylpentanoate (2-isopropylmalate). {ECO:0000255|HAMAP-
CC       Rule:MF_00572}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=3-methyl-2-oxobutanoate + acetyl-CoA + H2O = (2S)-2-
CC         isopropylmalate + CoA + H(+); Xref=Rhea:RHEA:21524, ChEBI:CHEBI:1178,
CC         ChEBI:CHEBI:11851, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:57287, ChEBI:CHEBI:57288; EC=2.3.3.13;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00572};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-leucine biosynthesis; L-leucine
CC       from 3-methyl-2-oxobutanoate: step 1/4. {ECO:0000255|HAMAP-
CC       Rule:MF_00572}.
CC   -!- SUBUNIT: Homotetramer. {ECO:0000255|HAMAP-Rule:MF_00572}.
CC   -!- SIMILARITY: Belongs to the alpha-IPM synthase/homocitrate synthase
CC       family. LeuA type 2 subfamily. {ECO:0000255|HAMAP-Rule:MF_00572}.
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DR   EMBL; CP000088; AAZ54888.1; -; Genomic_DNA.
DR   RefSeq; WP_016188375.1; NC_007333.1.
DR   AlphaFoldDB; Q47RM9; -.
DR   SMR; Q47RM9; -.
DR   STRING; 269800.Tfu_0850; -.
DR   PRIDE; Q47RM9; -.
DR   EnsemblBacteria; AAZ54888; AAZ54888; Tfu_0850.
DR   KEGG; tfu:Tfu_0850; -.
DR   eggNOG; COG0119; Bacteria.
DR   HOGENOM; CLU_004588_3_0_11; -.
DR   OMA; FGQGERT; -.
DR   OrthoDB; 840579at2; -.
DR   UniPathway; UPA00048; UER00070.
DR   GO; GO:0003852; F:2-isopropylmalate synthase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0009098; P:leucine biosynthetic process; IEA:UniProtKB-UniRule.
DR   CDD; cd07942; DRE_TIM_LeuA; 1.
DR   Gene3D; 3.20.20.70; -; 1.
DR   Gene3D; 3.30.160.270; -; 1.
DR   HAMAP; MF_00572; LeuA_type2; 1.
DR   InterPro; IPR013709; 2-isopropylmalate_synth_dimer.
DR   InterPro; IPR002034; AIPM/Hcit_synth_CS.
DR   InterPro; IPR013785; Aldolase_TIM.
DR   InterPro; IPR005668; IPM_Synthase.
DR   InterPro; IPR036230; LeuA_allosteric_dom_sf.
DR   InterPro; IPR039371; LeuA_N_DRE-TIM.
DR   InterPro; IPR000891; PYR_CT.
DR   Pfam; PF00682; HMGL-like; 1.
DR   Pfam; PF08502; LeuA_dimer; 1.
DR   SMART; SM00917; LeuA_dimer; 1.
DR   SUPFAM; SSF110921; SSF110921; 1.
DR   TIGRFAMs; TIGR00970; leuA_yeast; 1.
DR   PROSITE; PS00815; AIPM_HOMOCIT_SYNTH_1; 1.
DR   PROSITE; PS00816; AIPM_HOMOCIT_SYNTH_2; 1.
DR   PROSITE; PS50991; PYR_CT; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Branched-chain amino acid biosynthesis;
KW   Leucine biosynthesis; Transferase.
FT   CHAIN           1..568
FT                   /note="2-isopropylmalate synthase"
FT                   /id="PRO_1000129513"
FT   DOMAIN          37..313
FT                   /note="Pyruvate carboxyltransferase"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01151"
SQ   SEQUENCE   568 AA;  63389 MW;  4920B68910817B52 CRC64;
     MIPQQQPSGM PFHRYQPFKP VDLPDRTWPS KTITKAPRWL STDLRDGNQA LIEPMDTERK
     REIFDLLVRM GYKEIEVGFP AASQTDYDFV RYLIEEDRIP DDVQISVLTQ AREELIERTV
     QSLVGAKRAT VHLYNATSPE FRRIVFGVNR EECKGIAVEG TRTVLKFAEQ YLKDTEYFGY
     EYSPEIFIDT ELEFALEVCE AVMDVYQPGP DREIILNLPA TVERATPNVY ADQIEWMSRN
     LSRREYVCLS VHPHNDRGTA VAAAELAVMA GADRVEGCLF GHGERTGNVC LVTLGLNLFS
     QGIDPMIDFS NIDEIRRTVE HCTQLPVNPR HPYGGDLVYT AFSGSHQDAI KKGFHALEAD
     AAAAGVPVDE YRWNMPYLPI DPKDVGRTYE AVIRVNSQSG KGGVSYVLQR DYSIDLPRRL
     QIEFSRVVQQ FADAEGGEFS GERIWEIFTD TYLSEGVVGV MAYRSETSED GEYCISADVR
     LRGEIREITG TGNGPISAFV DALAGVGFKL RVLDYSEHAL SEGGDARAAA YVEAEVDGNV
     LWGVGISSNI TTASLKAVCS AVNRAQQS