ID M0G354_9EURY Unreviewed; 584 AA. AC M0G354; DT 03-APR-2013, integrated into UniProtKB/TrEMBL. DT 03-APR-2013, sequence version 1. DT 29-MAY-2024, entry version 48. DE RecName: Full=Dihydroxy-acid dehydratase {ECO:0000256|ARBA:ARBA00029490, ECO:0000256|HAMAP-Rule:MF_00012}; DE Short=DAD {ECO:0000256|HAMAP-Rule:MF_00012}; DE EC=4.2.1.9 {ECO:0000256|ARBA:ARBA00029490, ECO:0000256|HAMAP-Rule:MF_00012}; GN Name=ilvD {ECO:0000256|HAMAP-Rule:MF_00012}; GN ORFNames=C459_04195 {ECO:0000313|EMBL:ELZ66600.1}; OS Haloferax sp. ATCC BAA-645. OC Archaea; Euryarchaeota; Stenosarchaea group; Halobacteria; Haloferacales; OC Haloferacaceae; Haloferax. OX NCBI_TaxID=1227463 {ECO:0000313|EMBL:ELZ66600.1, ECO:0000313|Proteomes:UP000011673}; RN [1] {ECO:0000313|EMBL:ELZ66600.1, ECO:0000313|Proteomes:UP000011673} RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=ATCC BAA-645 {ECO:0000313|EMBL:ELZ66600.1, RC ECO:0000313|Proteomes:UP000011673}; RX PubMed=25393412; DOI=10.1371/journal.pgen.1004784; RA Becker E.A., Seitzer P.M., Tritt A., Larsen D., Krusor M., Yao A.I., Wu D., RA Madern D., Eisen J.A., Darling A.E., Facciotti M.T.; RT "Phylogenetically driven sequencing of extremely halophilic archaea reveals RT strategies for static and dynamic osmo-response."; RL PLoS Genet. 10:E1004784-E1004784(2014). 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:0000256|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; CC Evidence={ECO:0000256|ARBA:ARBA00029304}; CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:24810; CC Evidence={ECO:0000256|ARBA:ARBA00029304}; 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:0000256|HAMAP-Rule:MF_00012}; CC -!- COFACTOR: CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420; CC Evidence={ECO:0000256|ARBA:ARBA00001946, CC ECO:0000256|HAMAP-Rule:MF_00012}; CC -!- COFACTOR: CC Name=[2Fe-2S] cluster; Xref=ChEBI:CHEBI:190135; CC Evidence={ECO:0000256|HAMAP-Rule:MF_00012}; CC Note=Binds 1 [2Fe-2S] cluster per subunit. This cluster acts as a Lewis CC acid cofactor. {ECO:0000256|HAMAP-Rule:MF_00012}; CC -!- PATHWAY: Amino-acid biosynthesis; L-isoleucine biosynthesis; L- CC isoleucine from 2-oxobutanoate: step 3/4. CC {ECO:0000256|ARBA:ARBA00029437, ECO:0000256|HAMAP-Rule:MF_00012}. CC -!- PATHWAY: Amino-acid biosynthesis; L-valine biosynthesis; L-valine from CC pyruvate: step 3/4. {ECO:0000256|ARBA:ARBA00029436, ECO:0000256|HAMAP- CC Rule:MF_00012}. CC -!- SUBUNIT: Homodimer. {ECO:0000256|HAMAP-Rule:MF_00012}. CC -!- SIMILARITY: Belongs to the IlvD/Edd family. CC {ECO:0000256|ARBA:ARBA00006486, ECO:0000256|HAMAP-Rule:MF_00012}. CC -!- CAUTION: Lacks conserved residue(s) required for the propagation of CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_00012}. CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ CC whole genome shotgun (WGS) entry which is preliminary data. CC {ECO:0000313|EMBL:ELZ66600.1}. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; AOLE01000011; ELZ66600.1; -; Genomic_DNA. DR RefSeq; WP_008575988.1; NZ_AOLE01000011.1. DR AlphaFoldDB; M0G354; -. DR PATRIC; fig|1227463.4.peg.846; -. DR UniPathway; UPA00047; UER00057. DR UniPathway; UPA00049; UER00061. DR Proteomes; UP000011673; Unassembled WGS sequence. DR GO; GO:0051537; F:2 iron, 2 sulfur cluster binding; IEA:UniProtKB-UniRule. DR GO; GO:0004160; F:dihydroxy-acid dehydratase activity; IEA:UniProtKB-UniRule. DR GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule. DR GO; GO:0008652; P:amino acid biosynthetic process; IEA:UniProtKB-KW. 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; IlvD/EDD C-terminal domain-like; 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 NCBIfam; TIGR00110; ilvD; 1. DR PANTHER; PTHR21000; DIHYDROXY-ACID DEHYDRATASE DAD; 1. DR PANTHER; PTHR21000:SF5; DIHYDROXY-ACID DEHYDRATASE, MITOCHONDRIAL; 1. DR Pfam; PF00920; ILVD_EDD; 1. DR SUPFAM; SSF143975; IlvD/EDD N-terminal domain-like; 1. DR SUPFAM; SSF52016; LeuD/IlvD-like; 1. DR PROSITE; PS00886; ILVD_EDD_1; 1. DR PROSITE; PS00887; ILVD_EDD_2; 1. PE 3: Inferred from homology; KW 2Fe-2S {ECO:0000256|ARBA:ARBA00022714, ECO:0000256|HAMAP-Rule:MF_00012}; KW Amino-acid biosynthesis {ECO:0000256|ARBA:ARBA00022605, ECO:0000256|HAMAP- KW Rule:MF_00012}; KW Branched-chain amino acid biosynthesis {ECO:0000256|ARBA:ARBA00023304, KW ECO:0000256|HAMAP-Rule:MF_00012}; KW Iron {ECO:0000256|ARBA:ARBA00023004, ECO:0000256|HAMAP-Rule:MF_00012}; KW Iron-sulfur {ECO:0000256|ARBA:ARBA00023014, ECO:0000256|HAMAP- KW Rule:MF_00012}; KW Lyase {ECO:0000256|ARBA:ARBA00023239, ECO:0000256|HAMAP-Rule:MF_00012}; KW Magnesium {ECO:0000256|ARBA:ARBA00022842, ECO:0000256|HAMAP-Rule:MF_00012}; KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP- KW Rule:MF_00012}. FT REGION 1..37 FT /note="Disordered" FT /evidence="ECO:0000256|SAM:MobiDB-lite" FT COMPBIAS 1..17 FT /note="Basic and acidic residues" FT /evidence="ECO:0000256|SAM:MobiDB-lite" FT ACT_SITE 493 FT /note="Proton acceptor" FT /evidence="ECO:0000256|HAMAP-Rule:MF_00012" FT BINDING 68 FT /ligand="[2Fe-2S] cluster" FT /ligand_id="ChEBI:CHEBI:190135" FT /evidence="ECO:0000256|HAMAP-Rule:MF_00012" FT BINDING 100 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /evidence="ECO:0000256|HAMAP-Rule:MF_00012" FT BINDING 142 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /evidence="ECO:0000256|HAMAP-Rule:MF_00012" FT BINDING 143 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /note="via carbamate group" FT /evidence="ECO:0000256|HAMAP-Rule:MF_00012" FT BINDING 467 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /evidence="ECO:0000256|HAMAP-Rule:MF_00012" FT MOD_RES 143 FT /note="N6-carboxylysine" FT /evidence="ECO:0000256|HAMAP-Rule:MF_00012" SQ SEQUENCE 584 AA; 61951 MW; AC791A17027C8AEF CRC64; MSQQSPREED PDDVFSSGKD PNLRSTEVTE GPDKAPHRAM FRAMGFDDED FSSPMVGVPN PAADITPCNV HLDDVADAAI EGIDAAGGMP IEFGTVTISD AISMGTEGMK ASLVSREVIA DSVELVSFGE RMDALVTVAG CDKNLPGMMM AAIRTDLPSV FLYGGSIMPG QHEGREVTVQ NVFEGVGTYA EGDMSADELD DLERHACPGA GSCGGMFTAN TMASISEALG MAPLGSASAP AESDERYENA RRAGEVVLDC VENDRRPSDI LSKKSFENAI TLQVATGGST NAVLHLLALA AEAGVDLDIE EFNDISRRTP KIANLQPGGT RVMNDLHEIG GIPVVIRRLV EAGLFHGDAM TVTGRTIAEE LEHLDLPDDD ELEADFLYTV DEPYQDEGAI KILTGNLAPD GAVLKVTGDD AFHHTGPARV FENEEDAMRY VQEGHIEEGD VIAIRNEGPR GGPGMREMLG VTAAVVGQGH EDDVALLTDG RFSGATRGPM VGHVAPEATE GGPIGLLEDG DEVTVDIPNR ELSVDLTDEE LEARKEDWEP KPPAYTSGVL AKYARDFGSA ANGAVTNPAL TRDE //