ID   LEUD_FRATO              Reviewed;         189 AA.
AC   Q0BK19;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   17-OCT-2006, sequence version 1.
DT   03-AUG-2022, entry version 83.
DE   RecName: Full=3-isopropylmalate dehydratase small subunit {ECO:0000255|HAMAP-Rule:MF_01031};
DE            EC=4.2.1.33 {ECO:0000255|HAMAP-Rule:MF_01031};
DE   AltName: Full=Alpha-IPM isomerase {ECO:0000255|HAMAP-Rule:MF_01031};
DE            Short=IPMI {ECO:0000255|HAMAP-Rule:MF_01031};
DE   AltName: Full=Isopropylmalate isomerase {ECO:0000255|HAMAP-Rule:MF_01031};
GN   Name=leuD {ECO:0000255|HAMAP-Rule:MF_01031}; OrderedLocusNames=FTH_1813;
OS   Francisella tularensis subsp. holarctica (strain OSU18).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Thiotrichales;
OC   Francisellaceae; Francisella.
OX   NCBI_TaxID=393011;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=OSU18;
RX   PubMed=16980500; DOI=10.1128/jb.00506-06;
RA   Petrosino J.F., Xiang Q., Karpathy S.E., Jiang H., Yerrapragada S., Liu Y.,
RA   Gioia J., Hemphill L., Gonzalez A., Raghavan T.M., Uzman A., Fox G.E.,
RA   Highlander S., Reichard M., Morton R.J., Clinkenbeard K.D., Weinstock G.M.;
RT   "Chromosome rearrangement and diversification of Francisella tularensis
RT   revealed by the type B (OSU18) genome sequence.";
RL   J. Bacteriol. 188:6977-6985(2006).
CC   -!- FUNCTION: Catalyzes the isomerization between 2-isopropylmalate and 3-
CC       isopropylmalate, via the formation of 2-isopropylmaleate.
CC       {ECO:0000255|HAMAP-Rule:MF_01031}.
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; Evidence={ECO:0000255|HAMAP-Rule:MF_01031};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-leucine biosynthesis; L-leucine
CC       from 3-methyl-2-oxobutanoate: step 2/4. {ECO:0000255|HAMAP-
CC       Rule:MF_01031}.
CC   -!- SUBUNIT: Heterodimer of LeuC and LeuD. {ECO:0000255|HAMAP-
CC       Rule:MF_01031}.
CC   -!- SIMILARITY: Belongs to the LeuD family. LeuD type 1 subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_01031}.
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DR   EMBL; CP000437; ABI83565.1; -; Genomic_DNA.
DR   RefSeq; WP_003017457.1; NC_017463.1.
DR   AlphaFoldDB; Q0BK19; -.
DR   SMR; Q0BK19; -.
DR   KEGG; fth:FTH_1813; -.
DR   OMA; AFTTHTG; -.
DR   UniPathway; UPA00048; UER00071.
DR   GO; GO:0009316; C:3-isopropylmalate dehydratase complex; IEA:InterPro.
DR   GO; GO:0003861; F:3-isopropylmalate dehydratase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0009098; P:leucine biosynthetic process; IEA:UniProtKB-UniRule.
DR   CDD; cd01577; IPMI_Swivel; 1.
DR   Gene3D; 3.20.19.10; -; 1.
DR   HAMAP; MF_01031; LeuD_type1; 1.
DR   InterPro; IPR004431; 3-IsopropMal_deHydase_ssu.
DR   InterPro; IPR015928; Aconitase/3IPM_dehydase_swvl.
DR   InterPro; IPR000573; AconitaseA/IPMdHydase_ssu_swvl.
DR   InterPro; IPR033940; IPMI_Swivel.
DR   Pfam; PF00694; Aconitase_C; 1.
DR   TIGRFAMs; TIGR00171; leuD; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Branched-chain amino acid biosynthesis;
KW   Leucine biosynthesis; Lyase.
FT   CHAIN           1..189
FT                   /note="3-isopropylmalate dehydratase small subunit"
FT                   /id="PRO_1000063768"
SQ   SEQUENCE   189 AA;  21212 MW;  8F073F20E8585838 CRC64;
     MQAFKKLTSS AIPLWLSDID TDMIIPANFL TQTTKDGYGK SLFHNLKEKD SSFVFNNPDY
     SNSEILIAGD NFGCGSSREH AVWALTQAGI KVIIAPSFSD IFFNNAAKNG LLLISLDKDT
     VKELCDKAED PKFSMTIDLQ EQTVSADGSI YSFDYDPFRK DCLIRGLDDM TYLIEHLDII
     KQFEQSQRG