ILVD_RHIL3
ID ILVD_RHIL3 Reviewed; 612 AA.
AC Q1MIB2;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 30-MAY-2006, sequence version 1.
DT 03-AUG-2022, entry version 91.
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=RL1803;
OS Rhizobium leguminosarum bv. viciae (strain 3841).
OC Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC Rhizobiaceae; Rhizobium/Agrobacterium group; Rhizobium.
OX NCBI_TaxID=216596;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=3841;
RX PubMed=16640791; DOI=10.1186/gb-2006-7-4-r34;
RA Young J.P.W., Crossman L.C., Johnston A.W.B., Thomson N.R., Ghazoui Z.F.,
RA Hull K.H., Wexler M., Curson A.R.J., Todd J.D., Poole P.S., Mauchline T.H.,
RA East A.K., Quail M.A., Churcher C., Arrowsmith C., Cherevach I.,
RA Chillingworth T., Clarke K., Cronin A., Davis P., Fraser A., Hance Z.,
RA Hauser H., Jagels K., Moule S., Mungall K., Norbertczak H.,
RA Rabbinowitsch E., Sanders M., Simmonds M., Whitehead S., Parkhill J.;
RT "The genome of Rhizobium leguminosarum has recognizable core and accessory
RT components.";
RL Genome Biol. 7:R34.1-R34.20(2006).
RN [2]
RP DISRUPTION PHENOTYPE.
RC STRAIN=3841 {ECO:0000303|PubMed:19597156};
RX PubMed=19597156; DOI=10.1073/pnas.0903653106;
RA Prell J., White J.P., Bourdes A., Bunnewell S., Bongaerts R.J., Poole P.S.;
RT "Legumes regulate Rhizobium bacteroid development and persistence by the
RT supply of branched-chain amino acids.";
RL Proc. Natl. Acad. Sci. U.S.A. 106:12477-12482(2009).
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 -!- DISRUPTION PHENOTYPE: Does not nodulate the roots of pea plants.
CC {ECO:0000269|PubMed:19597156}.
CC -!- SIMILARITY: Belongs to the IlvD/Edd family. {ECO:0000255|HAMAP-
CC Rule:MF_00012}.
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DR EMBL; AM236080; CAK07298.1; -; Genomic_DNA.
DR RefSeq; WP_011651429.1; NC_008380.1.
DR AlphaFoldDB; Q1MIB2; -.
DR SMR; Q1MIB2; -.
DR STRING; 216596.RL1803; -.
DR EnsemblBacteria; CAK07298; CAK07298; RL1803.
DR KEGG; rle:RL1803; -.
DR eggNOG; COG0129; Bacteria.
DR HOGENOM; CLU_014271_4_2_5; -.
DR OMA; TQGRNMA; -.
DR OrthoDB; 193579at2; -.
DR UniPathway; UPA00047; UER00057.
DR UniPathway; UPA00049; UER00061.
DR Proteomes; UP000006575; 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.
FT CHAIN 1..612
FT /note="Dihydroxy-acid dehydratase"
FT /id="PRO_1000001044"
FT ACT_SITE 517
FT /note="Proton acceptor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 81
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 122
FT /ligand="[2Fe-2S] cluster"
FT /ligand_id="ChEBI:CHEBI:190135"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 123
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 124
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 195
FT /ligand="[2Fe-2S] cluster"
FT /ligand_id="ChEBI:CHEBI:190135"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT BINDING 491
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
FT MOD_RES 124
FT /note="N6-carboxylysine"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00012"
SQ SEQUENCE 612 AA; 65420 MW; CC59998A4BD02506 CRC64;
MPVYRSRTTT HGRNMAGARG LWRATGMKDS DFGKPIIAVV NSFTQFVPGH VHLKDLGQLV
AREIEAAGGV AKEFNTIAVD DGIAMGHDGM LYSLPSRELI ADSVEYMVNA HCADAMVCIS
NCDKITPGML MASLRLNIPT VFVSGGPMEA GKVVMHGKTH ALDLVDAMVA AADDKISDED
VQTIERSACP TCGSCSGMFT ANSMNCLTEA LGLSLPGNGS TLATHLDRKR LFVEAGHLIV
DLARRYYEQD DVKALPRTIA SKQAFENAMT LDIAMGGSTN TVLHILAAAH EGEIDFTMAD
IDALSRRVPC LSKVAPAKSD VHMEDVHRAG GIMSILGELD KGGLLNRDCP TVHAETLGDA
IDRWDITRTN SETVRKFYRA APGGIPTQVA FSQEARWDEL DTDRENGVIR SVEHPFSKDG
GLAVLKGNLA IDGCIVKTAG VDESILKFSG PARVFESQDA SVKAILANEV KAGDVVVIRY
EGPKGGPGMQ EMLYPTSYLK SKGLGKACAL ITDGRFSGGT SGLSIGHASP EAANGGTIGL
VREGDMIDID IPNRTISLRV SETELAARRA EQDAKGWYPT EVRKRNVTTA LKAYAAFATS
ADRGAVRDLN VR
