ILVC_ERWT9
ID ILVC_ERWT9 Reviewed; 492 AA.
AC B2VG69;
DT 14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT 01-JUL-2008, sequence version 1.
DT 03-AUG-2022, entry version 91.
DE RecName: Full=Ketol-acid reductoisomerase (NADP(+)) {ECO:0000255|HAMAP-Rule:MF_00435};
DE Short=KARI {ECO:0000255|HAMAP-Rule:MF_00435};
DE EC=1.1.1.86 {ECO:0000255|HAMAP-Rule:MF_00435};
DE AltName: Full=Acetohydroxy-acid isomeroreductase {ECO:0000255|HAMAP-Rule:MF_00435};
DE Short=AHIR {ECO:0000255|HAMAP-Rule:MF_00435};
DE AltName: Full=Alpha-keto-beta-hydroxylacyl reductoisomerase {ECO:0000255|HAMAP-Rule:MF_00435};
DE AltName: Full=Ketol-acid reductoisomerase type 2 {ECO:0000255|HAMAP-Rule:MF_00435};
DE AltName: Full=Ketol-acid reductoisomerase type II {ECO:0000255|HAMAP-Rule:MF_00435};
GN Name=ilvC {ECO:0000255|HAMAP-Rule:MF_00435}; OrderedLocusNames=ETA_01900;
OS Erwinia tasmaniensis (strain DSM 17950 / CFBP 7177 / CIP 109463 / NCPPB
OS 4357 / Et1/99).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC Erwiniaceae; Erwinia.
OX NCBI_TaxID=465817;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 17950 / CFBP 7177 / CIP 109463 / NCPPB 4357 / Et1/99;
RX PubMed=18462403; DOI=10.1111/j.1462-2920.2008.01639.x;
RA Kube M., Migdoll A.M., Mueller I., Kuhl H., Beck A., Reinhardt R.,
RA Geider K.;
RT "The genome of Erwinia tasmaniensis strain Et1/99, a non-pathogenic
RT bacterium in the genus Erwinia.";
RL Environ. Microbiol. 10:2211-2222(2008).
CC -!- FUNCTION: Involved in the biosynthesis of branched-chain amino acids
CC (BCAA). Catalyzes an alkyl-migration followed by a ketol-acid reduction
CC of (S)-2-acetolactate (S2AL) to yield (R)-2,3-dihydroxy-isovalerate. In
CC the isomerase reaction, S2AL is rearranged via a Mg-dependent methyl
CC migration to produce 3-hydroxy-3-methyl-2-ketobutyrate (HMKB). In the
CC reductase reaction, this 2-ketoacid undergoes a metal-dependent
CC reduction by NADPH to yield (R)-2,3-dihydroxy-isovalerate.
CC {ECO:0000255|HAMAP-Rule:MF_00435}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=(2R)-2,3-dihydroxy-3-methylbutanoate + NADP(+) = (2S)-2-
CC acetolactate + H(+) + NADPH; Xref=Rhea:RHEA:22068, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:49072, ChEBI:CHEBI:57783, ChEBI:CHEBI:58349,
CC ChEBI:CHEBI:58476; EC=1.1.1.86; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_00435};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=(2R,3R)-2,3-dihydroxy-3-methylpentanoate + NADP(+) = (S)-2-
CC ethyl-2-hydroxy-3-oxobutanoate + H(+) + NADPH; Xref=Rhea:RHEA:13493,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:49256, ChEBI:CHEBI:49258,
CC ChEBI:CHEBI:57783, ChEBI:CHEBI:58349; EC=1.1.1.86;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00435};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00435};
CC Note=Binds 2 magnesium ions per subunit. {ECO:0000255|HAMAP-
CC Rule:MF_00435};
CC -!- PATHWAY: Amino-acid biosynthesis; L-isoleucine biosynthesis; L-
CC isoleucine from 2-oxobutanoate: step 2/4. {ECO:0000255|HAMAP-
CC Rule:MF_00435}.
CC -!- PATHWAY: Amino-acid biosynthesis; L-valine biosynthesis; L-valine from
CC pyruvate: step 2/4. {ECO:0000255|HAMAP-Rule:MF_00435}.
CC -!- SIMILARITY: Belongs to the ketol-acid reductoisomerase family.
CC {ECO:0000255|HAMAP-Rule:MF_00435}.
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DR EMBL; CU468135; CAO95236.1; -; Genomic_DNA.
DR RefSeq; WP_012439956.1; NC_010694.1.
DR AlphaFoldDB; B2VG69; -.
DR SMR; B2VG69; -.
DR STRING; 465817.ETA_01900; -.
DR EnsemblBacteria; CAO95236; CAO95236; ETA_01900.
DR KEGG; eta:ETA_01900; -.
DR eggNOG; COG0059; Bacteria.
DR HOGENOM; CLU_551905_0_0_6; -.
DR OMA; CGLLQTG; -.
DR OrthoDB; 188901at2; -.
DR UniPathway; UPA00047; UER00056.
DR UniPathway; UPA00049; UER00060.
DR Proteomes; UP000001726; Chromosome.
DR GO; GO:0004455; F:ketol-acid reductoisomerase 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; 1.10.1040.10; -; 1.
DR HAMAP; MF_00435; IlvC; 1.
DR InterPro; IPR008927; 6-PGluconate_DH-like_C_sf.
DR InterPro; IPR013328; 6PGD_dom2.
DR InterPro; IPR013023; KARI.
DR InterPro; IPR000506; KARI_C.
DR InterPro; IPR013116; KARI_N.
DR InterPro; IPR036291; NAD(P)-bd_dom_sf.
DR PANTHER; PTHR21371; PTHR21371; 2.
DR Pfam; PF01450; IlvC; 2.
DR Pfam; PF07991; IlvN; 1.
DR SUPFAM; SSF48179; SSF48179; 2.
DR SUPFAM; SSF51735; SSF51735; 1.
DR TIGRFAMs; TIGR00465; ilvC; 1.
DR PROSITE; PS51851; KARI_C; 2.
DR PROSITE; PS51850; KARI_N; 1.
PE 3: Inferred from homology;
KW Amino-acid biosynthesis; Branched-chain amino acid biosynthesis; Magnesium;
KW Metal-binding; NADP; Oxidoreductase; Reference proteome; Repeat.
FT CHAIN 1..492
FT /note="Ketol-acid reductoisomerase (NADP(+))"
FT /id="PRO_1000190952"
FT DOMAIN 15..208
FT /note="KARI N-terminal Rossmann"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01197"
FT DOMAIN 209..344
FT /note="KARI C-terminal knotted 1"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01198"
FT DOMAIN 345..485
FT /note="KARI C-terminal knotted 2"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01198"
FT ACT_SITE 132
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT BINDING 45..48
FT /ligand="NADP(+)"
FT /ligand_id="ChEBI:CHEBI:58349"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT BINDING 68
FT /ligand="NADP(+)"
FT /ligand_id="ChEBI:CHEBI:58349"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT BINDING 76
FT /ligand="NADP(+)"
FT /ligand_id="ChEBI:CHEBI:58349"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT BINDING 78
FT /ligand="NADP(+)"
FT /ligand_id="ChEBI:CHEBI:58349"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT BINDING 108..110
FT /ligand="NADP(+)"
FT /ligand_id="ChEBI:CHEBI:58349"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT BINDING 158
FT /ligand="NADP(+)"
FT /ligand_id="ChEBI:CHEBI:58349"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT BINDING 217
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT BINDING 217
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT BINDING 221
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT BINDING 389
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT BINDING 393
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT BINDING 414
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
SQ SEQUENCE 492 AA; 53904 MW; 801DCFE1A6497E5F CRC64;
MANYFNTLNL RNQLAQLGKC RFMAREEFAD EASYLKGKKV VIVGCGAQGL NQGLNMRDSG
LDIAYALRAE AIAEKRASWR KATENGFKVG TYEELIPQAD LVVNLTPDKQ HTSVVQAVQP
LMKDGAALGY SHGFNIVEVG EQVRKDVTVV MVAPKCPGTE VREEYKRGFG VPTLIAVHPE
NDPKGEGMAI AKAWAAATGG HRAGVLESSF VAEVKSDLMG EQTILCGMLQ AGSLLCFDKL
VAEGTDAAYA EKLIQFGWET ITEALKQGGI TLMMDRLSNP AKVRAYALSE QLKTIMAPLF
QKHMDDIISG EFSSGMMADW ANDDKKLLGW REETGKTAFE TAAQFEGKIG EQDYFDQGVV
MIAMVKAGVE LAFETMVAAG IVEESAYYES LHELPLIANT IARKRLYEMN VVISDTAEYG
NYLFSYAAVP LLQEFMTTLQ AGDLGKQAQT STSVDNAQLR DVNEAIRHHD IETVGRKLRG
YMTDMKRIAV AG
