ILVD_METST
ID ILVD_METST Reviewed; 549 AA.
AC Q2NE10;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 07-FEB-2006, sequence version 1.
DT 03-AUG-2022, entry version 86.
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=Msp_1576;
OS Methanosphaera stadtmanae (strain ATCC 43021 / DSM 3091 / JCM 11832 /
OS MCB-3).
OC Archaea; Euryarchaeota; Methanomada group; Methanobacteria;
OC Methanobacteriales; Methanobacteriaceae; Methanosphaera.
OX NCBI_TaxID=339860;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 43021 / DSM 3091 / JCM 11832 / MCB-3;
RX PubMed=16385054; DOI=10.1128/jb.188.2.642-658.2006;
RA Fricke W.F., Seedorf H., Henne A., Kruer M., Liesegang H., Hedderich R.,
RA Gottschalk G., Thauer R.K.;
RT "The genome sequence of Methanosphaera stadtmanae reveals why this human
RT intestinal archaeon is restricted to methanol and H2 for methane formation
RT and ATP synthesis.";
RL J. Bacteriol. 188:642-658(2006).
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}.
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DR EMBL; CP000102; ABC57943.1; -; Genomic_DNA.
DR RefSeq; WP_011407142.1; NC_007681.1.
DR AlphaFoldDB; Q2NE10; -.
DR SMR; Q2NE10; -.
DR STRING; 339860.Msp_1576; -.
DR EnsemblBacteria; ABC57943; ABC57943; Msp_1576.
DR GeneID; 41326153; -.
DR KEGG; mst:Msp_1576; -.
DR eggNOG; arCOG04045; Archaea.
DR HOGENOM; CLU_014271_4_2_2; -.
DR OMA; TQGRNMA; -.
DR OrthoDB; 7176at2157; -.
DR UniPathway; UPA00047; UER00057.
DR UniPathway; UPA00049; UER00061.
DR Proteomes; UP000001931; Chromosome.
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: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..549
FT /note="Dihydroxy-acid dehydratase"
FT /id="PRO_1000001011"
FT ACT_SITE 466
FT /note="Proton acceptor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 78
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 119
FT /ligand="[2Fe-2S] cluster"
FT /ligand_id="ChEBI:CHEBI:190135"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 120
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 121
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 191
FT /ligand="[2Fe-2S] cluster"
FT /ligand_id="ChEBI:CHEBI:190135"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 441
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT MOD_RES 121
FT /note="N6-carboxylysine"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
SQ SEQUENCE 549 AA; 59101 MW; 8215BC98CDDAD5BD CRC64;
MRSDNIKKGI NRTSHRSLLR ACGLDDNDMK KPFIGIANSY TDIVPGHIHL KDLVQEVKEV
IRLEGGVPFE FDTMAVCDGI AMNHEGMYYS LPSREIIANT VESMAMAHQF DALILMPTCD
KVVPGMIMAA ARLNIPAIVI TGGPMMPGKF HGETVDFINV TEAVGATQSG KMSEEDLYEL
ERCACPGAGS CAGLFTANTM ACLTETMGMS LPGCATAHAV SDKKVEIARA SAKKIFTLLE
NDIKPSDILT QEAFENAIKV DLALGGSTNT TLHIPAIANE VDGVDVTIDL FDKLSHEVPY
ICSIRPGGNN RMIDVENAGG IPAVMKNMES ILNTDCITCT SNSVKENLEK VSDIDYNVIH
TLDDPIRTEG GIAVLYGNVA PNGCVIKQGA VNEDMLVHSG PCKVFNSEEE CVLAIENDEI
IDGDVVVIRY EGPKGGPGMR EMLNPTAAIM GRELFHVALI TDGRFSGGSR GPCIGHISPE
AAEGGPIGAI ENGDIVSINV KERTIKLELT DDEIKERLSK VKPVERNLKG WLKQYQKLAT
SADKGAILK
