ID   LEU1_BACAH              Reviewed;         506 AA.
AC   A0RBL2;
DT   28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT   09-JAN-2007, sequence version 1.
DT   25-MAY-2022, entry version 89.
DE   RecName: Full=2-isopropylmalate synthase {ECO:0000255|HAMAP-Rule:MF_01025};
DE            EC=2.3.3.13 {ECO:0000255|HAMAP-Rule:MF_01025};
DE   AltName: Full=Alpha-IPM synthase {ECO:0000255|HAMAP-Rule:MF_01025};
DE   AltName: Full=Alpha-isopropylmalate synthase {ECO:0000255|HAMAP-Rule:MF_01025};
GN   Name=leuA {ECO:0000255|HAMAP-Rule:MF_01025}; OrderedLocusNames=BALH_1255;
OS   Bacillus thuringiensis (strain Al Hakam).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Bacillus;
OC   Bacillus cereus group.
OX   NCBI_TaxID=412694;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Al Hakam;
RX   PubMed=17337577; DOI=10.1128/jb.00241-07;
RA   Challacombe J.F., Altherr M.R., Xie G., Bhotika S.S., Brown N., Bruce D.,
RA   Campbell C.S., Campbell M.L., Chen J., Chertkov O., Cleland C.,
RA   Dimitrijevic M., Doggett N.A., Fawcett J.J., Glavina T., Goodwin L.A.,
RA   Green L.D., Han C.S., Hill K.K., Hitchcock P., Jackson P.J., Keim P.,
RA   Kewalramani A.R., Longmire J., Lucas S., Malfatti S., Martinez D.,
RA   McMurry K., Meincke L.J., Misra M., Moseman B.L., Mundt M., Munk A.C.,
RA   Okinaka R.T., Parson-Quintana B., Reilly L.P., Richardson P.,
RA   Robinson D.L., Saunders E., Tapia R., Tesmer J.G., Thayer N.,
RA   Thompson L.S., Tice H., Ticknor L.O., Wills P.L., Gilna P., Brettin T.S.;
RT   "The complete genome sequence of Bacillus thuringiensis Al Hakam.";
RL   J. Bacteriol. 189:3680-3681(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_01025}.
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_01025};
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_01025}.
CC   -!- SUBUNIT: Homotetramer. {ECO:0000255|HAMAP-Rule:MF_01025}.
CC   -!- SIMILARITY: Belongs to the alpha-IPM synthase/homocitrate synthase
CC       family. LeuA type 1 subfamily. {ECO:0000255|HAMAP-Rule:MF_01025}.
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DR   EMBL; CP000485; ABK84605.1; -; Genomic_DNA.
DR   RefSeq; WP_000721814.1; NC_008600.1.
DR   AlphaFoldDB; A0RBL2; -.
DR   SMR; A0RBL2; -.
DR   EnsemblBacteria; ABK84605; ABK84605; BALH_1255.
DR   KEGG; btl:BALH_1255; -.
DR   HOGENOM; CLU_022158_0_1_9; -.
DR   OMA; NTMRMLV; -.
DR   UniPathway; UPA00048; UER00070.
DR   Proteomes; UP000000761; 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   Gene3D; 3.20.20.70; -; 1.
DR   Gene3D; 3.30.160.270; -; 1.
DR   HAMAP; MF_01025; LeuA_type1; 1.
DR   InterPro; IPR013709; 2-isopropylmalate_synth_dimer.
DR   InterPro; IPR002034; AIPM/Hcit_synth_CS.
DR   InterPro; IPR013785; Aldolase_TIM.
DR   InterPro; IPR036230; LeuA_allosteric_dom_sf.
DR   InterPro; IPR005671; LeuA_bact_synth.
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; TIGR00973; leuA_bact; 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..506
FT                   /note="2-isopropylmalate synthase"
FT                   /id="PRO_1000149128"
FT   DOMAIN          4..266
FT                   /note="Pyruvate carboxyltransferase"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01151"
SQ   SEQUENCE   506 AA;  55417 MW;  F7705794E96A5F45 CRC64;
     MKKILFMDTT LRDGEQSPGV NLNEQEKLQI ARQLERLGIH VMEAGFAAAS EGDFQSVKRI
     ANTIQNATVM SLARAKESDI RRAYEAVKGA VSPRLHVFLA TSDIHMKYKL CMSKEDVLDS
     IYRSVTLGKS LFPTVQFSAE DATRTSRDFL AEAVEVAIRA GANVINIPDT VGYTNPEEYY
     SLFKYLQESV PSYEKAIFSC HCHDDLGMAV ANSLAAVEGG ALQVEGTING IGERAGNAAL
     EEVAVALHIR KDFYKAEPSM TLKEIKATST LVSRLTGMVV PKNKAIVGAN AFAHESGIHQ
     DGVLKEVTTY EIIEPALVGE SQNLFVLGKH SGRHAFTEKM KELGYEFTND ERDAVFEAFK
     KLADRKKEIT EEDLRALMLG EAAFAAQQYN ITQLQVHFVS NSTQCATVVL KDEEGNVFED
     AATGSGSIEA IYNAIQRILG LECELADYRI QSITQGQDAL AHVHVELKEG AHQVSGFGVA
     QDVLEASARA YVHAAGKLKS FIQLVK