LEU3_PSYCK
ID LEU3_PSYCK Reviewed; 367 AA.
AC Q1QAF5;
DT 19-SEP-2006, integrated into UniProtKB/Swiss-Prot.
DT 16-MAY-2006, sequence version 1.
DT 03-AUG-2022, entry version 96.
DE RecName: Full=3-isopropylmalate dehydrogenase {ECO:0000255|HAMAP-Rule:MF_01033};
DE EC=1.1.1.85 {ECO:0000255|HAMAP-Rule:MF_01033};
DE AltName: Full=3-IPM-DH {ECO:0000255|HAMAP-Rule:MF_01033};
DE AltName: Full=Beta-IPM dehydrogenase {ECO:0000255|HAMAP-Rule:MF_01033};
DE Short=IMDH {ECO:0000255|HAMAP-Rule:MF_01033};
GN Name=leuB {ECO:0000255|HAMAP-Rule:MF_01033}; OrderedLocusNames=Pcryo_1571;
OS Psychrobacter cryohalolentis (strain ATCC BAA-1226 / DSM 17306 / VKM B-2378
OS / K5).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Moraxellales; Moraxellaceae;
OC Psychrobacter.
OX NCBI_TaxID=335284;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC BAA-1226 / DSM 17306 / VKM B-2378 / K5;
RG US DOE Joint Genome Institute;
RA Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T.,
RA Hammon N., Israni S., Dalin E., Tice H., Pitluck S., Brettin T., Bruce D.,
RA Han C., Tapia R., Sims D.R., Gilna P., Schmutz J., Larimer F., Land M.,
RA Hauser L., Kyrpides N., Kim E., Richardson P.;
RT "Complete sequence of chromosome of Psychrobacter cryohalolentis K5.";
RL Submitted (MAR-2006) 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:0000255|HAMAP-Rule:MF_01033}.
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; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_01033};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01033};
CC Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01033};
CC Note=Binds 1 Mg(2+) or Mn(2+) ion per subunit. {ECO:0000255|HAMAP-
CC Rule:MF_01033};
CC -!- PATHWAY: Amino-acid biosynthesis; L-leucine biosynthesis; L-leucine
CC from 3-methyl-2-oxobutanoate: step 3/4. {ECO:0000255|HAMAP-
CC Rule:MF_01033}.
CC -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01033}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01033}.
CC -!- SIMILARITY: Belongs to the isocitrate and isopropylmalate
CC dehydrogenases family. LeuB type 1 subfamily. {ECO:0000255|HAMAP-
CC Rule:MF_01033}.
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DR EMBL; CP000323; ABE75348.1; -; Genomic_DNA.
DR RefSeq; WP_011513899.1; NC_007969.1.
DR AlphaFoldDB; Q1QAF5; -.
DR SMR; Q1QAF5; -.
DR STRING; 335284.Pcryo_1571; -.
DR KEGG; pcr:Pcryo_1571; -.
DR eggNOG; COG0473; Bacteria.
DR HOGENOM; CLU_031953_0_3_6; -.
DR OMA; EYDLGAR; -.
DR UniPathway; UPA00048; UER00072.
DR Proteomes; UP000002425; Chromosome.
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 HAMAP; MF_01033; LeuB_type1; 1.
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..367
FT /note="3-isopropylmalate dehydrogenase"
FT /id="PRO_0000250127"
FT BINDING 75..88
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01033"
FT BINDING 95
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01033"
FT BINDING 105
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01033"
FT BINDING 133
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01033"
FT BINDING 230
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01033"
FT BINDING 230
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01033"
FT BINDING 254
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01033"
FT BINDING 258
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01033"
FT BINDING 288..300
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01033"
FT SITE 140
FT /note="Important for catalysis"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01033"
FT SITE 197
FT /note="Important for catalysis"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01033"
SQ SEQUENCE 367 AA; 39200 MW; C1B6DC45AB1F4AC9 CRC64;
MATILTLAGD GIGPEIMTQA IDVLNAVNDK FALGLTLESG LIGGVAVDST GEPLPEETLQ
RARAADAVLL GAVGGPKWDG IERSKRPERG LLKIRSELGL FANLRVAKLY PQLVNASSIK
PEIISGLDLL IVRELTGGIY FGEPRGIRTL ENGEQQGYNT MVYSTSEINR IGKVAFELAQ
TRAQAAGTAA KVCSIDKANV LEVTELWKQT MIELQQSEYS DVALSHMYAD NACMQLIKDP
KQFDVMVTGN LFGDILSDEA AMLTGSIGML PSASLDEAGK GMYEPCHGSA PDIAGQDIAN
PLATILSVSM MLRYTFKQEA AAQAIEQAVS DVLDDGLRTV DILDRNEAGL IQVGCQQMGQ
AVLAKLI
