ID   LEU1_DESHY              Reviewed;         557 AA.
AC   Q24PE3;
DT   05-APR-2011, integrated into UniProtKB/Swiss-Prot.
DT   18-APR-2006, sequence version 1.
DT   03-AUG-2022, entry version 97.
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=DSY4310;
OS   Desulfitobacterium hafniense (strain Y51).
OC   Bacteria; Firmicutes; Clostridia; Eubacteriales; Desulfitobacteriaceae;
OC   Desulfitobacterium.
OX   NCBI_TaxID=138119;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Y51;
RX   PubMed=16513756; DOI=10.1128/jb.188.6.2262-2274.2006;
RA   Nonaka H., Keresztes G., Shinoda Y., Ikenaga Y., Abe M., Naito K.,
RA   Inatomi K., Furukawa K., Inui M., Yukawa H.;
RT   "Complete genome sequence of the dehalorespiring bacterium
RT   Desulfitobacterium hafniense Y51 and comparison with Dehalococcoides
RT   ethenogenes 195.";
RL   J. Bacteriol. 188:2262-2274(2006).
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; AP008230; BAE86099.1; -; Genomic_DNA.
DR   RefSeq; WP_011461751.1; NC_007907.1.
DR   AlphaFoldDB; Q24PE3; -.
DR   SMR; Q24PE3; -.
DR   STRING; 138119.DSY4310; -.
DR   EnsemblBacteria; BAE86099; BAE86099; DSY4310.
DR   KEGG; dsy:DSY4310; -.
DR   eggNOG; COG0119; Bacteria.
DR   HOGENOM; CLU_004588_3_2_9; -.
DR   OMA; WPDKVID; -.
DR   OrthoDB; 840579at2; -.
DR   UniPathway; UPA00048; UER00070.
DR   Proteomes; UP000001946; Chromosome.
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   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; Reference proteome; Transferase.
FT   CHAIN           1..557
FT                   /note="2-isopropylmalate synthase"
FT                   /id="PRO_0000406874"
FT   DOMAIN          31..304
FT                   /note="Pyruvate carboxyltransferase"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01151"
SQ   SEQUENCE   557 AA;  62708 MW;  74A35077DF801115 CRC64;
     MKNVDNYRRG YFMPPVKSLK WAEKEYITTP PTWCSVDLRD GNQALVVPMS LEEKLEYYHM
     LLKIGFKEIE VGFPAASETE YAFLRTLIEQ NLIPEDVTIQ VLTQSRDHII EKTFKALVGV
     KKAVVHLYNS TSVAQREQVF KMSREEIVEI AVSGARLLKK YAAETEGNFQ FEYSPESFTG
     TEMEFALEIC NQVLDVFEPT PENKVIINLP ATVSLSMPHV YASQIEYMSE HLKYRDNVIL
     SLHPHNDRGT AVADAELGLL AGGQRIEGTL FGNGERTGNV DIVTLALNLF SHGVDPGLNF
     ASMLEITAKY EALTRMKVHD RQPYGGKLVF AAFSGSHQDA ITKGIKWREE HECHYWNVPY
     LLIDPQDIGR EYEGDVIRIN SQSGKGGIAY MLEQHYALDL PAKMREAFGY KVKNVSDNLH
     KELMPEEIKD IFFKEYVNIE NPIKFLNFHF LNHDDFQTTV TLEFKGEIQE LSGEGDGRLD
     AISNALQARL GLSYSNLIYK EHALELGSKS QAVSYVGVTG PDGVIHWGCG IHTDIFTSSV
     KALISAINTM IKDSAAV