LEU3_PICAN
ID LEU3_PICAN Reviewed; 362 AA.
AC P34733;
DT 01-FEB-1994, integrated into UniProtKB/Swiss-Prot.
DT 01-FEB-1994, sequence version 1.
DT 03-AUG-2022, entry version 100.
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 Pichia angusta (Yeast) (Hansenula polymorpha).
OC Eukaryota; Fungi; Dikarya; Ascomycota; Saccharomycotina; Saccharomycetes;
OC Saccharomycetales; Pichiaceae; Ogataea.
OX NCBI_TaxID=870730;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC STRAIN=ATCC 34438 / CBS 4732 / DSM 70277 / JCM 3621 / NBRC 1476 / NRRL
RC Y-5445;
RX PubMed=7941737; DOI=10.1002/yea.320100410;
RA Agaphonov M.O., Poznyakovski A.I., Bogdanova A.I., Ter-Avanesyan M.D.;
RT "Isolation and characterization of the LEU2 gene of Hansenula polymorpha.";
RL Yeast 10:509-513(1994).
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; U00889; AAA19109.1; -; Unassigned_DNA.
DR PIR; S43454; S43454.
DR AlphaFoldDB; P34733; -.
DR SMR; P34733; -.
DR BRENDA; 1.1.1.85; 2587.
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..362
FT /note="3-isopropylmalate dehydrogenase"
FT /id="PRO_0000083615"
FT BINDING 76..87
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000250"
FT BINDING 94
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 104
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 133
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 222
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000250"
FT BINDING 222
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 247
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000250"
FT BINDING 251
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000250"
FT BINDING 286..297
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000250"
FT SITE 140
FT /note="Important for catalysis"
FT /evidence="ECO:0000250"
FT SITE 189
FT /note="Important for catalysis"
FT /evidence="ECO:0000250"
SQ SEQUENCE 362 AA; 38047 MW; C2227553E8FC4891 CRC64;
MSKNIVLLPG DHVGPEVVAE AVKVLEAVSS AIGVKFNFSK HLIGGASIDA YGVPLSDEAL
EAAKKADAVL LGAVGGPKWG TGSVRPEQGL LKIRKELNLY ANLRPCSFAS DALLKLSPLK
SEIVKGTDFV VVRELVGGIY FGDRKEDAGD GVASDTESYS VPEVQRITRM AAFLALQSDP
PLPLWSLDKA NVLASSRLWR KTVEETIKNE FPQLTVQHQL IDSAAMILVK SPTKLNGVIV
TNNMFGDIIS DEASVIPGSL GLLPSASLAS LPDTNKAFGL YEPCHGSAPD LGPGKVNPLA
TILSAAMMLK LSLDLVDAGR AIEQAVKNVL DAGIMTADLG GSSSTQEVGD AVAQEVAKLL
KN
