ID A0A069JXB0_9ACTN Unreviewed; 339 AA.
AC A0A069JXB0;
DT 01-OCT-2014, integrated into UniProtKB/TrEMBL.
DT 01-OCT-2014, sequence version 1.
DT 24-JAN-2024, entry version 42.
DE RecName: Full=3-isopropylmalate dehydrogenase {ECO:0000256|HAMAP-Rule:MF_01035};
DE EC=1.1.1.85 {ECO:0000256|HAMAP-Rule:MF_01035};
DE AltName: Full=3-IPM-DH {ECO:0000256|HAMAP-Rule:MF_01035};
DE AltName: Full=Beta-IPM dehydrogenase {ECO:0000256|HAMAP-Rule:MF_01035};
DE Short=IMDH {ECO:0000256|HAMAP-Rule:MF_01035};
GN Name=leuB {ECO:0000256|HAMAP-Rule:MF_01035};
GN ORFNames=DT87_21565 {ECO:0000313|EMBL:KDQ69684.1};
OS Streptomyces sp. NTK 937.
OC Bacteria; Actinomycetota; Actinomycetes; Kitasatosporales;
OC Streptomycetaceae; Streptomyces.
OX NCBI_TaxID=1487711 {ECO:0000313|EMBL:KDQ69684.1, ECO:0000313|Proteomes:UP000027475};
RN [1] {ECO:0000313|EMBL:KDQ69684.1, ECO:0000313|Proteomes:UP000027475}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=NTK 937 {ECO:0000313|EMBL:KDQ69684.1,
RC ECO:0000313|Proteomes:UP000027475};
RA Olano C., Cano-Prieto C., Losada A., Mendez C., Salas J.A.;
RT "Draft genome sequence of marine actinomycete Streptomyces sp. NTK 937,
RT producer of the benzoxazol antibiotic caboxamycin.";
RL Submitted (APR-2014) 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 {ECO:0000256|HAMAP-Rule:MF_01035}.
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 Evidence={ECO:0000256|ARBA:ARBA00000624, ECO:0000256|HAMAP-
CC Rule:MF_01035};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01035};
CC Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01035};
CC Note=Binds 1 Mg(2+) or Mn(2+) ion per subunit. {ECO:0000256|HAMAP-
CC Rule:MF_01035};
CC -!- COFACTOR:
CC Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC Evidence={ECO:0000256|ARBA:ARBA00001936};
CC -!- PATHWAY: Amino-acid biosynthesis; L-leucine biosynthesis; L-leucine
CC from 3-methyl-2-oxobutanoate: step 3/4. {ECO:0000256|HAMAP-
CC Rule:MF_01035}.
CC -!- SUBUNIT: Homodimer. {ECO:0000256|HAMAP-Rule:MF_01035}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_01035}.
CC -!- SIMILARITY: Belongs to the isocitrate and isopropylmalate
CC dehydrogenases family. LeuB type 2 subfamily. {ECO:0000256|HAMAP-
CC Rule:MF_01035}.
CC -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_01035}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:KDQ69684.1}.
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DR EMBL; JJOB01000001; KDQ69684.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A069JXB0; -.
DR UniPathway; UPA00048; UER00072.
DR Proteomes; UP000027475; Unassembled WGS sequence.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0003862; F:3-isopropylmalate dehydrogenase activity; IEA:UniProtKB-UniRule.
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-UniRule.
DR Gene3D; 3.40.718.10; Isopropylmalate Dehydrogenase; 1.
DR HAMAP; MF_01035; LeuB_type2; 1.
DR InterPro; IPR019818; IsoCit/isopropylmalate_DH_CS.
DR InterPro; IPR024084; IsoPropMal-DH-like_dom.
DR InterPro; IPR023698; LeuB_actb.
DR PANTHER; PTHR43275; D-MALATE DEHYDROGENASE [DECARBOXYLATING]; 1.
DR PANTHER; PTHR43275:SF1; D-MALATE DEHYDROGENASE [DECARBOXYLATING]; 1.
DR Pfam; PF00180; Iso_dh; 1.
DR SMART; SM01329; Iso_dh; 1.
DR SUPFAM; SSF53659; Isocitrate/Isopropylmalate dehydrogenase-like; 1.
DR PROSITE; PS00470; IDH_IMDH; 1.
PE 3: Inferred from homology;
KW Amino-acid biosynthesis {ECO:0000256|HAMAP-Rule:MF_01035};
KW Branched-chain amino acid biosynthesis {ECO:0000256|ARBA:ARBA00023304,
KW ECO:0000256|HAMAP-Rule:MF_01035};
KW Cytoplasm {ECO:0000256|ARBA:ARBA00022490, ECO:0000256|HAMAP-Rule:MF_01035};
KW Leucine biosynthesis {ECO:0000256|ARBA:ARBA00022430, ECO:0000256|HAMAP-
KW Rule:MF_01035}; Magnesium {ECO:0000256|HAMAP-Rule:MF_01035};
KW Manganese {ECO:0000256|ARBA:ARBA00023211, ECO:0000256|HAMAP-Rule:MF_01035};
KW Metal-binding {ECO:0000256|HAMAP-Rule:MF_01035};
KW NAD {ECO:0000256|HAMAP-Rule:MF_01035};
KW Oxidoreductase {ECO:0000256|HAMAP-Rule:MF_01035,
KW ECO:0000313|EMBL:KDQ69684.1}.
FT DOMAIN 1..333
FT /note="Isopropylmalate dehydrogenase-like"
FT /evidence="ECO:0000259|SMART:SM01329"
FT BINDING 86
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01035"
FT BINDING 96
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01035"
FT BINDING 120
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01035"
FT BINDING 211
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01035"
FT BINDING 211
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01035"
FT BINDING 235
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01035"
FT BINDING 239
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01035"
FT SITE 127
FT /note="Important for catalysis"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01035"
FT SITE 178
FT /note="Important for catalysis"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01035"
SQ SEQUENCE 339 AA; 36279 MW; 3D8EABE625667576 CRC64;
MIPGDGIGQE VVTQGLKVLN AVLPQDVKLE TKEYDLGARR WHRTGETLPD AELEALRNHD
AILLGAIGDP SVPSGVLERG LLLKLRFAFD HFVNLRPSKL FPNTATPLAG RPEIDFVVVR
EGTEGPYTGN GGSLRTGTEH EVATEVSVNT AYGVERVVRD AFARAAARPR KKLTLVHKNN
VLVHAGHLWK NIFDAVATEY PEVTTDYLHV DAATIFFVTQ PERFDVIVTD NLFGDILTDL
AAAVTGGIGL AASGNINPTG AFPSMFEPVH GTAPDIAGQG KADPTATILS VALLLRHLGY
EAEAVRIEEA VSADLAEREG KAARSTDEIG DALAVRVAS
//
