LEUC_BUCUL
ID LEUC_BUCUL Reviewed; 369 AA.
AC Q9AQC6;
DT 02-AUG-2002, integrated into UniProtKB/Swiss-Prot.
DT 01-JUN-2001, sequence version 1.
DT 03-AUG-2022, entry version 88.
DE RecName: Full=3-isopropylmalate dehydratase large subunit;
DE EC=4.2.1.33;
DE AltName: Full=Alpha-IPM isomerase;
DE Short=IPMI;
DE AltName: Full=Isopropylmalate isomerase;
DE Flags: Fragment;
GN Name=leuC;
OS Buchnera aphidicola subsp. Uroleucon rurale.
OC Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC Erwiniaceae; Buchnera.
OX NCBI_TaxID=168386;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=11133977; DOI=10.1128/jb.183.2.785-790.2001;
RA Wernegreen J.J., Moran N.A.;
RT "Vertical transmission of biosynthetic plasmids in aphid endosymbionts
RT (Buchnera).";
RL J. Bacteriol. 183:785-790(2001).
CC -!- FUNCTION: Catalyzes the isomerization between 2-isopropylmalate and 3-
CC isopropylmalate, via the formation of 2-isopropylmaleate.
CC {ECO:0000250}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=(2R,3S)-3-isopropylmalate = (2S)-2-isopropylmalate;
CC Xref=Rhea:RHEA:32287, ChEBI:CHEBI:1178, ChEBI:CHEBI:35121;
CC EC=4.2.1.33;
CC -!- COFACTOR:
CC Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883; Evidence={ECO:0000250};
CC Note=Binds 1 [4Fe-4S] cluster per subunit. {ECO:0000250};
CC -!- PATHWAY: Amino-acid biosynthesis; L-leucine biosynthesis; L-leucine
CC from 3-methyl-2-oxobutanoate: step 2/4.
CC -!- SUBUNIT: Heterodimer of LeuC and LeuD. {ECO:0000250}.
CC -!- SIMILARITY: Belongs to the aconitase/IPM isomerase family. LeuC type 1
CC subfamily. {ECO:0000305}.
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DR EMBL; AF201383; AAG53462.1; -; Genomic_DNA.
DR AlphaFoldDB; Q9AQC6; -.
DR SMR; Q9AQC6; -.
DR UniPathway; UPA00048; UER00071.
DR GO; GO:0003861; F:3-isopropylmalate dehydratase activity; IEA:UniProtKB-EC.
DR GO; GO:0051539; F:4 iron, 4 sulfur cluster binding; IEA:UniProtKB-KW.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0009098; P:leucine biosynthetic process; IEA:UniProtKB-UniPathway.
DR CDD; cd01583; IPMI; 1.
DR Gene3D; 3.30.499.10; -; 2.
DR InterPro; IPR004430; 3-IsopropMal_deHydase_lsu.
DR InterPro; IPR015931; Acnase/IPM_dHydase_lsu_aba_1/3.
DR InterPro; IPR001030; Acoase/IPM_deHydtase_lsu_aba.
DR InterPro; IPR018136; Aconitase_4Fe-4S_BS.
DR InterPro; IPR036008; Aconitase_4Fe-4S_dom.
DR InterPro; IPR033941; IPMI_cat.
DR Pfam; PF00330; Aconitase; 1.
DR PRINTS; PR00415; ACONITASE.
DR SUPFAM; SSF53732; SSF53732; 1.
DR TIGRFAMs; TIGR00170; leuC; 1.
DR PROSITE; PS00450; ACONITASE_1; 1.
DR PROSITE; PS01244; ACONITASE_2; 1.
PE 3: Inferred from homology;
KW 4Fe-4S; Amino-acid biosynthesis; Branched-chain amino acid biosynthesis;
KW Iron; Iron-sulfur; Leucine biosynthesis; Lyase; Metal-binding.
FT CHAIN <1..>369
FT /note="3-isopropylmalate dehydratase large subunit"
FT /id="PRO_0000076729"
FT BINDING 274
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000250"
FT BINDING 334
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000250"
FT BINDING 337
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000250"
FT NON_TER 1
FT NON_TER 369
SQ SEQUENCE 369 AA; 40853 MW; 39CCE472D04D83F7 CRC64;
ASGLMARKQM EQLIKNCDEF NISLYDINNP NQGIVHVIAP EKGMTLPGMI IVCGDSHTST
HGAFGALSFG IGTSEVEHVL ATQTLKQQRF KNMKIEIIGD VPQFVTAKDI ILFVIGRLGS
SGGTGYVIEF CGNVIKKMSM EERMTVCNMA IEMGAKSGII APDEITYSYL REKIYSPYGL
FWKKSIDYWK TLKSDKDAFF DKCFTIDVSN LAPQVTRGTN PDQVTSINEK IPNYNKFHSI
VQKNSAKSAC KYMGLKEGTY LTDIFIDKVF IGSCTNARIE DLRSASTILK NRKIANNVKA
IVVPGSGSVK QQAEMEGLDK IFINAGFEWR LPGCSMCLGM NNDRLNVGER CASHSNRNFE
GRQGRGGRT
