ID   LEUD_BIFAA              Reviewed;         229 AA.
AC   A0ZZS8;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 1.
DT   25-MAY-2022, entry version 91.
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=BAD_0180;
OS   Bifidobacterium adolescentis (strain ATCC 15703 / DSM 20083 / NCTC 11814 /
OS   E194a).
OC   Bacteria; Actinobacteria; Bifidobacteriales; Bifidobacteriaceae;
OC   Bifidobacterium.
OX   NCBI_TaxID=367928;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 15703 / DSM 20083 / NCTC 11814 / E194a;
RA   Suzuki T., Tsuda Y., Kanou N., Inoue T., Kumazaki K., Nagano S., Hirai S.,
RA   Tanaka K., Watanabe K.;
RT   "Bifidobacterium adolescentis complete genome sequence.";
RL   Submitted (DEC-2006) to the EMBL/GenBank/DDBJ databases.
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; AP009256; BAF38961.1; -; Genomic_DNA.
DR   RefSeq; WP_011742714.1; NC_008618.1.
DR   AlphaFoldDB; A0ZZS8; -.
DR   SMR; A0ZZS8; -.
DR   STRING; 1680.BADO_0188; -.
DR   EnsemblBacteria; BAF38961; BAF38961; BAD_0180.
DR   GeneID; 56674238; -.
DR   KEGG; bad:BAD_0180; -.
DR   HOGENOM; CLU_081378_0_1_11; -.
DR   OMA; AFTTHTG; -.
DR   UniPathway; UPA00048; UER00071.
DR   Proteomes; UP000008702; Chromosome.
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; Reference proteome.
FT   CHAIN           1..229
FT                   /note="3-isopropylmalate dehydratase small subunit"
FT                   /id="PRO_1000063735"
FT   REGION          198..229
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        198..212
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   229 AA;  26240 MW;  C6F5AD660FFE8E22 CRC64;
     MEKLTTLTGV AVPLRRSNVD TDQIIPAVFL KRVKKSGFDD ALFYAWRRDP EFVLNKPEYK
     QGKILVAGPD FGIGSSREHA VWALHDYGFR VVISSRFADI FYGNTAKNGV LAAIMPQESI
     ELLWKLLDEE PGREMTVSLE DRTVTCGDVT LPFEVNDYTR WRLMNGYDDI DLTLQHEDDI
     IAYEKMRAEK FPFKPKTLPV KREPEQPIES AREGEYPDWQ GPLADRGII