LEU3_BUCCC
ID LEU3_BUCCC Reviewed; 367 AA.
AC Q5WPZ9;
DT 06-FEB-2007, integrated into UniProtKB/Swiss-Prot.
DT 23-NOV-2004, sequence version 1.
DT 03-AUG-2022, entry version 105.
DE RecName: Full=3-isopropylmalate dehydrogenase;
DE EC=1.1.1.85;
DE AltName: Full=3-IPM-DH;
DE AltName: Full=Beta-IPM dehydrogenase;
DE Short=IMDH;
GN Name=leuB; OrderedLocusNames=BCc_PL3;
OS Buchnera aphidicola subsp. Cinara cedri (strain Cc).
OG Plasmid pLeu-BCc.
OC Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC Erwiniaceae; Buchnera.
OX NCBI_TaxID=372461;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Cc;
RX PubMed=16413149; DOI=10.1016/j.gene.2005.10.043;
RA Gil R., Sabater-Munoz B., Perez-Brocal V., Silva F.J., Latorre A.;
RT "Plasmids in the aphid endosymbiont Buchnera aphidicola with the smallest
RT genomes. A puzzling evolutionary story.";
RL Gene 370:17-25(2006).
RN [2]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Cc;
RX PubMed=17038625; DOI=10.1126/science.1130441;
RA Perez-Brocal V., Gil R., Ramos S., Lamelas A., Postigo M., Michelena J.M.,
RA Silva F.J., Moya A., Latorre A.;
RT "A small microbial genome: the end of a long symbiotic relationship?";
RL Science 314:312-313(2006).
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. LeuB type 1 subfamily. {ECO:0000305}.
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DR EMBL; AY438025; AAR99734.1; -; Genomic_DNA.
DR RefSeq; WP_012622903.1; NC_011878.1.
DR AlphaFoldDB; Q5WPZ9; -.
DR SMR; Q5WPZ9; -.
DR STRING; 372461.41323037; -.
DR EnsemblBacteria; AAR99734; AAR99734; AAR99734.
DR KEGG; bcc:leuB; -.
DR eggNOG; COG0473; Bacteria.
DR HOGENOM; CLU_031953_0_3_6; -.
DR OMA; EYDLGAR; -.
DR OrthoDB; 1551125at2; -.
DR UniPathway; UPA00048; UER00072.
DR Proteomes; UP000000669; Plasmid pLeu-BCc.
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; Plasmid; Reference proteome.
FT CHAIN 1..367
FT /note="3-isopropylmalate dehydrogenase"
FT /id="PRO_0000274189"
FT BINDING 80..93
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000250"
FT BINDING 101
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 111
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 140
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 230
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000250"
FT BINDING 230
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 254
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000250"
FT BINDING 258
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000250"
FT BINDING 288..300
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000250"
FT SITE 147
FT /note="Important for catalysis"
FT /evidence="ECO:0000250"
FT SITE 198
FT /note="Important for catalysis"
FT /evidence="ECO:0000250"
SQ SEQUENCE 367 AA; 41114 MW; EE0B76D6D4B38690 CRC64;
MKKKKEYRIA VLPGDGIGPE VMQEAYKILN VINKKFDFNI YTNEYDIGGI AIDKYGAPLP
KKTLNGCIES HAILFGSIGG KEWTHLPADE QPERGGLLPL RKFFNLFVNL RPIKLHFSLK
KLSPLKKEII QDGFDILCVR ELIGGIYFGL PKGKNTFDKK NISAFDTEIY STKEIEKIAD
IAFQLSLKRK KKVFSIDKAN VLESSMLWRE VVIQVSKRYP NVELIHLYID NAAMQLIKNP
NQFDVILCSN LFGDILSDEC AALTGSLGML PSASLNESFF GLFEPAGGSA PDLKGKNIAN
PIAQILSLAL LFKYSLQLEK ISHLIELSVL KTLEKGYRTL DISNGKKYIT TDQMGNYIAK
TLSELIN
