ID   LEU3_SACEX              Reviewed;         365 AA.
AC   Q96WT9;
DT   09-SEP-2003, integrated into UniProtKB/Swiss-Prot.
DT   01-DEC-2001, sequence version 1.
DT   03-AUG-2022, entry version 83.
DE   RecName: Full=3-isopropylmalate dehydrogenase;
DE            Short=3-IPM-DH;
DE            Short=IMDH;
DE            EC=1.1.1.85;
DE   AltName: Full=Beta-IPM dehydrogenase;
GN   Name=LEU2;
OS   Saccharomyces exiguus (Yeast).
OC   Eukaryota; Fungi; Dikarya; Ascomycota; Saccharomycotina; Saccharomycetes;
OC   Saccharomycetales; Saccharomycetaceae; Kazachstania.
OX   NCBI_TaxID=34358;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=Yp74L-3;
RX   PubMed=16232419; DOI=10.1016/s1389-1723(99)80002-4;
RA   Hisatomi T., Horio K., Mimoto T., Tsuboi M.;
RT   "DNA sequence of the beta-isopropylmalate dehydrogenase gene and
RT   phylogenetic analysis of the yeast Saccharomyces exiguus Yp74L-3.";
RL   J. Biosci. Bioeng. 87:15-18(1999).
CC   -!- FUNCTION: Catalyzes the oxidation of 3-carboxy-2-hydroxy-4-
CC       methylpentanoate (3-isopropylmalate) to 3-carboxy-4-methyl-2-
CC       oxopentanoate. The product decarboxylates to 4-methyl-2 oxopentanoate
CC       (By similarity). {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(2R,3S)-3-isopropylmalate + NAD(+) = 4-methyl-2-oxopentanoate
CC         + CO2 + NADH; Xref=Rhea:RHEA:32271, ChEBI:CHEBI:16526,
CC         ChEBI:CHEBI:17865, ChEBI:CHEBI:35121, ChEBI:CHEBI:57540,
CC         ChEBI:CHEBI:57945; EC=1.1.1.85;
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000250};
CC       Name=Mn(2+); Xref=ChEBI:CHEBI:29035; Evidence={ECO:0000250};
CC       Note=Binds 1 Mg(2+) or Mn(2+) ion per subunit. {ECO:0000250};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-leucine biosynthesis; L-leucine
CC       from 3-methyl-2-oxobutanoate: step 3/4.
CC   -!- SUBUNIT: Homodimer. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the isocitrate and isopropylmalate
CC       dehydrogenases family. {ECO:0000305}.
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DR   EMBL; AB006676; BAB63465.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q96WT9; -.
DR   SMR; Q96WT9; -.
DR   UniPathway; UPA00048; UER00072.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0003862; F:3-isopropylmalate dehydrogenase activity; IEA:UniProtKB-EC.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:InterPro.
DR   GO; GO:0051287; F:NAD binding; IEA:InterPro.
DR   GO; GO:0009098; P:leucine biosynthetic process; IEA:UniProtKB-UniPathway.
DR   InterPro; IPR019818; IsoCit/isopropylmalate_DH_CS.
DR   InterPro; IPR024084; IsoPropMal-DH-like_dom.
DR   InterPro; IPR004429; Isopropylmalate_DH.
DR   PANTHER; PTHR42979; PTHR42979; 1.
DR   Pfam; PF00180; Iso_dh; 1.
DR   SMART; SM01329; Iso_dh; 1.
DR   TIGRFAMs; TIGR00169; leuB; 1.
DR   PROSITE; PS00470; IDH_IMDH; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Branched-chain amino acid biosynthesis; Cytoplasm;
KW   Leucine biosynthesis; Magnesium; Manganese; Metal-binding; NAD;
KW   Oxidoreductase.
FT   CHAIN           1..365
FT                   /note="3-isopropylmalate dehydrogenase"
FT                   /id="PRO_0000083622"
FT   BINDING         80..91
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000250"
FT   BINDING         98
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000250"
FT   BINDING         108
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000250"
FT   BINDING         137
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000250"
FT   BINDING         226
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
FT   BINDING         226
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000250"
FT   BINDING         251
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
FT   BINDING         255
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250"
FT   BINDING         290..301
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000250"
FT   SITE            144
FT                   /note="Important for catalysis"
FT                   /evidence="ECO:0000250"
FT   SITE            193
FT                   /note="Important for catalysis"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   365 AA;  38986 MW;  88DAA6AFFDD200BF CRC64;
     MAQTTKHIVV LPGDHVGQEI TEEAIKVLNA ISSVRPNVNF DFQHHLIGGA AIDATGVPLP
     DEALEASKKA DAVLLGAVGG PKWGTGSVRP EQGLLKIRKE LQLYANLRPC NFASDSLLDL
     SPLKPEIVKG TDICIVRELV GGIYFGERKE DEGDGVAWDS EKYSVSEVQR ITRMAGFLAL
     QHNPPLPVWS LDKANVLASS RLWRKTVEET IKNEFPTLTV QHQLIDSAAM ILVKNPTHLN
     GVVIANNMFG DIISDEASVI PGSLGLLPSA SLASLPDTNT AFGLYEPCHG SAPDLPKGKV
     NPVATILSVA MMLKLSLNMT EEGIAVEKAV KQVLDSGVRT ADLRGSNSTS EVGDAIAKAV
     KEILA