ID   LEU3_SORMA              Reviewed;         368 AA.
AC   Q6TWC4;
DT   11-OCT-2004, integrated into UniProtKB/Swiss-Prot.
DT   05-JUL-2004, sequence version 1.
DT   03-AUG-2022, entry version 75.
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=LEU1;
OS   Sordaria macrospora.
OC   Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Sordariomycetes;
OC   Sordariomycetidae; Sordariales; Sordariaceae; Sordaria.
OX   NCBI_TaxID=5147;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Kueck U.;
RT   "Genetic analysis of the S. macrospora developmental mutant pro4: a dual
RT   function of the leu1 gene in amino acid biosynthesis and fruiting body
RT   formation.";
RL   Submitted (SEP-2003) to the EMBL/GenBank/DDBJ databases.
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   -!- 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.
CC   -!- SIMILARITY: Belongs to the isocitrate and isopropylmalate
CC       dehydrogenases family. {ECO:0000305}.
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DR   EMBL; AY386218; AAQ90189.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q6TWC4; -.
DR   SMR; Q6TWC4; -.
DR   PRIDE; Q6TWC4; -.
DR   VEuPathDB; FungiDB:SMAC_07082; -.
DR   OMA; MATHNIV; -.
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..368
FT                   /note="3-isopropylmalate dehydrogenase"
FT                   /id="PRO_0000083619"
FT   BINDING         79..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         291..303
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   368 AA;  38689 MW;  26C235180281EFAF CRC64;
     MATHNIVVFG GDHCGPEVVV EAIKVLKSIE TNSPSAGKFN LQNHLLGGAS IDKHHDPLTD
     EALNAAKAAD AVLLGAIGGP EWGTSSTVRP EQGLLKLRKE LGTYGNLRPC NFASESLVDS
     SPLKAEVCRG TDFIVVRELT GGIYFGDRTE DDGSGYACDT EPYSRAEIER IARLAGFLAL
     AKNPPAKVWS LDKANVLATS RLWRKTVTDV ISKEFPQLQL EHQLIDSAAM LLVKNPRALN
     GVVITSNLFG DIISDEASVI PGSIGLLPSA SLGGIPDGKG KCNGIYEPIH GSAPDISGKG
     IVNPVGTILS VAMMLRYSLN LPKEADAVEA AVKAAIDNGT KTKDLGGSAT TSDMGNAVVA
     ELEKILKA