ILVD_RHOBA
ID ILVD_RHOBA Reviewed; 567 AA.
AC Q7UJ69;
DT 15-DEC-2003, integrated into UniProtKB/Swiss-Prot.
DT 15-DEC-2003, sequence version 2.
DT 03-AUG-2022, entry version 97.
DE RecName: Full=Dihydroxy-acid dehydratase {ECO:0000255|HAMAP-Rule:MF_00012};
DE Short=DAD {ECO:0000255|HAMAP-Rule:MF_00012};
DE EC=4.2.1.9 {ECO:0000255|HAMAP-Rule:MF_00012};
GN Name=ilvD {ECO:0000255|HAMAP-Rule:MF_00012}; OrderedLocusNames=RB12087;
OS Rhodopirellula baltica (strain DSM 10527 / NCIMB 13988 / SH1).
OC Bacteria; Planctomycetes; Planctomycetia; Pirellulales; Pirellulaceae;
OC Rhodopirellula.
OX NCBI_TaxID=243090;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 10527 / NCIMB 13988 / SH1;
RX PubMed=12835416; DOI=10.1073/pnas.1431443100;
RA Gloeckner F.O., Kube M., Bauer M., Teeling H., Lombardot T., Ludwig W.,
RA Gade D., Beck A., Borzym K., Heitmann K., Rabus R., Schlesner H., Amann R.,
RA Reinhardt R.;
RT "Complete genome sequence of the marine planctomycete Pirellula sp. strain
RT 1.";
RL Proc. Natl. Acad. Sci. U.S.A. 100:8298-8303(2003).
CC -!- FUNCTION: Functions in the biosynthesis of branched-chain amino acids.
CC Catalyzes the dehydration of (2R,3R)-2,3-dihydroxy-3-methylpentanoate
CC (2,3-dihydroxy-3-methylvalerate) into 2-oxo-3-methylpentanoate (2-oxo-
CC 3-methylvalerate) and of (2R)-2,3-dihydroxy-3-methylbutanoate (2,3-
CC dihydroxyisovalerate) into 2-oxo-3-methylbutanoate (2-oxoisovalerate),
CC the penultimate precursor to L-isoleucine and L-valine, respectively.
CC {ECO:0000255|HAMAP-Rule:MF_00012}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=(2R)-2,3-dihydroxy-3-methylbutanoate = 3-methyl-2-oxobutanoate
CC + H2O; Xref=Rhea:RHEA:24809, ChEBI:CHEBI:11851, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:49072; EC=4.2.1.9; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_00012};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:24810;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00012};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=(2R,3R)-2,3-dihydroxy-3-methylpentanoate = (S)-3-methyl-2-
CC oxopentanoate + H2O; Xref=Rhea:RHEA:27694, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:35146, ChEBI:CHEBI:49258; EC=4.2.1.9;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00012};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:27695;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00012};
CC -!- COFACTOR:
CC Name=[2Fe-2S] cluster; Xref=ChEBI:CHEBI:190135;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00012};
CC Note=Binds 1 [2Fe-2S] cluster per subunit. This cluster acts as a Lewis
CC acid cofactor. {ECO:0000255|HAMAP-Rule:MF_00012};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00012};
CC -!- PATHWAY: Amino-acid biosynthesis; L-isoleucine biosynthesis; L-
CC isoleucine from 2-oxobutanoate: step 3/4. {ECO:0000255|HAMAP-
CC Rule:MF_00012}.
CC -!- PATHWAY: Amino-acid biosynthesis; L-valine biosynthesis; L-valine from
CC pyruvate: step 3/4. {ECO:0000255|HAMAP-Rule:MF_00012}.
CC -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00012}.
CC -!- SIMILARITY: Belongs to the IlvD/Edd family. {ECO:0000255|HAMAP-
CC Rule:MF_00012}.
CC -!- SEQUENCE CAUTION:
CC Sequence=CAD77389.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR EMBL; BX294154; CAD77389.1; ALT_INIT; Genomic_DNA.
DR RefSeq; NP_870314.1; NC_005027.1.
DR AlphaFoldDB; Q7UJ69; -.
DR SMR; Q7UJ69; -.
DR STRING; 243090.RB12087; -.
DR EnsemblBacteria; CAD77389; CAD77389; RB12087.
DR KEGG; rba:RB12087; -.
DR PATRIC; fig|243090.15.peg.5842; -.
DR eggNOG; COG0129; Bacteria.
DR HOGENOM; CLU_014271_4_1_0; -.
DR InParanoid; Q7UJ69; -.
DR OrthoDB; 193579at2; -.
DR UniPathway; UPA00047; UER00057.
DR UniPathway; UPA00049; UER00061.
DR Proteomes; UP000001025; Chromosome.
DR GO; GO:0051537; F:2 iron, 2 sulfur cluster binding; IEA:UniProtKB-UniRule.
DR GO; GO:0004160; F:dihydroxy-acid dehydratase activity; IBA:GO_Central.
DR GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0009082; P:branched-chain amino acid biosynthetic process; IBA:GO_Central.
DR GO; GO:0009097; P:isoleucine biosynthetic process; IEA:UniProtKB-UniRule.
DR GO; GO:0009099; P:valine biosynthetic process; IEA:UniProtKB-UniRule.
DR Gene3D; 3.50.30.80; -; 1.
DR HAMAP; MF_00012; IlvD; 1.
DR InterPro; IPR042096; Dihydro-acid_dehy_C.
DR InterPro; IPR004404; DihydroxyA_deHydtase.
DR InterPro; IPR000581; DiOHA_6PGluconate_deHydtase.
DR InterPro; IPR020558; DiOHA_6PGluconate_deHydtase_CS.
DR InterPro; IPR037237; IlvD/EDD_N.
DR Pfam; PF00920; ILVD_EDD; 1.
DR SUPFAM; SSF143975; SSF143975; 1.
DR TIGRFAMs; TIGR00110; ilvD; 1.
DR PROSITE; PS00886; ILVD_EDD_1; 1.
DR PROSITE; PS00887; ILVD_EDD_2; 1.
PE 3: Inferred from homology;
KW 2Fe-2S; Amino-acid biosynthesis; Branched-chain amino acid biosynthesis;
KW Iron; Iron-sulfur; Lyase; Magnesium; Metal-binding; Reference proteome.
FT CHAIN 1..567
FT /note="Dihydroxy-acid dehydratase"
FT /id="PRO_0000103499"
FT REGION 1..24
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT ACT_SITE 482
FT /note="Proton acceptor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 60
FT /ligand="[2Fe-2S] cluster"
FT /ligand_id="ChEBI:CHEBI:190135"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 92
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 133
FT /ligand="[2Fe-2S] cluster"
FT /ligand_id="ChEBI:CHEBI:190135"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 134
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 135
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /note="via carbamate group"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 205
FT /ligand="[2Fe-2S] cluster"
FT /ligand_id="ChEBI:CHEBI:190135"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 456
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT MOD_RES 135
FT /note="N6-carboxylysine"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
SQ SEQUENCE 567 AA; 60291 MW; F52946968301A0B4 CRC64;
MTASQPESDS NALNKYSSKI TQPKSQGASQ AMLYATGMSS EDMNKPQVGI GSMWYEGNSC
NMHLLDLAAD VKAGVTDAGM VGMRFNTIGV SDGISMGTDG MSFSLQSRDL IADSIETIMG
AQWYDALITL PGCDKNMPGC LMAMGRLNRP SIMVYGGTIK PGSYRDEKLD IVSAFQCYGQ
FIAGQISEEE RSEIVRRSCP GAGACGGMYT ANTMATAIEA LGMALPYSAS IPAEHPEKKE
ECKRAGLAIL ELLKKDIKPR DIMTRGAFED AMVTLMALGG STNAVLHLIA MARSVDVPLT
IEDFQSVSDR TPFLADLKPS GKFVQEDLHS VGGTPAVMKY LLEKGMIKGE HMTVTGKTLA
ENLADLPGLK TGQKIVSTVE EPIKKSGHIR ILKGSLATEG AVAKITGKEG LQFSGPARVY
DNEELMLAAL EQKQIQKGDV VVIRYEGPKG GPGMPEMLTP TSAIMGAGLG SDVAMLTDGR
FSGGSHGFIV GHITPEAQVG GPIALIEDGD TITIDAETNS LDLEVDAAEL EARRSKWTAP
PLKATRGTLY KYIKCVKSAS EGCVTDE
