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ILVC2_BACAN
ID   ILVC2_BACAN             Reviewed;         335 AA.
AC   Q81S27; Q6I0A6; Q6KU80;
DT   19-JUL-2004, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-2003, sequence version 1.
DT   03-AUG-2022, entry version 131.
DE   RecName: Full=Ketol-acid reductoisomerase (NADP(+)) 2 {ECO:0000255|HAMAP-Rule:MF_00435};
DE            Short=KARI 2 {ECO:0000255|HAMAP-Rule:MF_00435};
DE            EC=1.1.1.86 {ECO:0000255|HAMAP-Rule:MF_00435};
DE   AltName: Full=Acetohydroxy-acid isomeroreductase 2 {ECO:0000255|HAMAP-Rule:MF_00435};
DE            Short=AHIR 2 {ECO:0000255|HAMAP-Rule:MF_00435};
DE   AltName: Full=Alpha-keto-beta-hydroxylacyl reductoisomerase 2 {ECO:0000255|HAMAP-Rule:MF_00435};
DE   AltName: Full=Ketol-acid reductoisomerase type 1 {ECO:0000255|HAMAP-Rule:MF_00435};
DE   AltName: Full=Ketol-acid reductoisomerase type I {ECO:0000255|HAMAP-Rule:MF_00435};
GN   Name=ilvC2 {ECO:0000255|HAMAP-Rule:MF_00435}; Synonyms=ilvC-2;
GN   OrderedLocusNames=BA_1852, GBAA_1852, BAS1716;
OS   Bacillus anthracis.
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Bacillus;
OC   Bacillus cereus group.
OX   NCBI_TaxID=1392;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Ames / isolate Porton;
RX   PubMed=12721629; DOI=10.1038/nature01586;
RA   Read T.D., Peterson S.N., Tourasse N.J., Baillie L.W., Paulsen I.T.,
RA   Nelson K.E., Tettelin H., Fouts D.E., Eisen J.A., Gill S.R.,
RA   Holtzapple E.K., Okstad O.A., Helgason E., Rilstone J., Wu M.,
RA   Kolonay J.F., Beanan M.J., Dodson R.J., Brinkac L.M., Gwinn M.L.,
RA   DeBoy R.T., Madpu R., Daugherty S.C., Durkin A.S., Haft D.H., Nelson W.C.,
RA   Peterson J.D., Pop M., Khouri H.M., Radune D., Benton J.L., Mahamoud Y.,
RA   Jiang L., Hance I.R., Weidman J.F., Berry K.J., Plaut R.D., Wolf A.M.,
RA   Watkins K.L., Nierman W.C., Hazen A., Cline R.T., Redmond C., Thwaite J.E.,
RA   White O., Salzberg S.L., Thomason B., Friedlander A.M., Koehler T.M.,
RA   Hanna P.C., Kolstoe A.-B., Fraser C.M.;
RT   "The genome sequence of Bacillus anthracis Ames and comparison to closely
RT   related bacteria.";
RL   Nature 423:81-86(2003).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Ames ancestor;
RX   PubMed=18952800; DOI=10.1128/jb.01347-08;
RA   Ravel J., Jiang L., Stanley S.T., Wilson M.R., Decker R.S., Read T.D.,
RA   Worsham P., Keim P.S., Salzberg S.L., Fraser-Liggett C.M., Rasko D.A.;
RT   "The complete genome sequence of Bacillus anthracis Ames 'Ancestor'.";
RL   J. Bacteriol. 191:445-446(2009).
RN   [3]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Sterne;
RA   Brettin T.S., Bruce D., Challacombe J.F., Gilna P., Han C., Hill K.,
RA   Hitchcock P., Jackson P., Keim P., Longmire J., Lucas S., Okinaka R.,
RA   Richardson P., Rubin E., Tice H.;
RT   "Complete genome sequence of Bacillus anthracis Sterne.";
RL   Submitted (JAN-2004) to the EMBL/GenBank/DDBJ databases.
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; AE016879; AAP25755.1; -; Genomic_DNA.
DR   EMBL; AE017334; AAT30967.1; -; Genomic_DNA.
DR   EMBL; AE017225; AAT54032.1; -; Genomic_DNA.
DR   RefSeq; NP_844269.1; NC_003997.3.
DR   RefSeq; WP_000861162.1; NZ_WXXJ01000017.1.
DR   RefSeq; YP_027981.1; NC_005945.1.
DR   AlphaFoldDB; Q81S27; -.
DR   SMR; Q81S27; -.
DR   IntAct; Q81S27; 5.
DR   STRING; 260799.BAS1716; -.
DR   DNASU; 1086430; -.
DR   EnsemblBacteria; AAP25755; AAP25755; BA_1852.
DR   EnsemblBacteria; AAT30967; AAT30967; GBAA_1852.
DR   GeneID; 45021787; -.
DR   KEGG; ban:BA_1852; -.
DR   KEGG; bar:GBAA_1852; -.
DR   KEGG; bat:BAS1716; -.
DR   PATRIC; fig|198094.11.peg.1822; -.
DR   eggNOG; COG0059; Bacteria.
DR   HOGENOM; CLU_033821_0_1_9; -.
DR   OMA; KGMDWMY; -.
DR   UniPathway; UPA00047; UER00056.
DR   UniPathway; UPA00049; UER00060.
DR   Proteomes; UP000000427; Chromosome.
DR   Proteomes; UP000000594; 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:0050661; F:NADP binding; IEA:InterPro.
DR   GO; GO:0009097; P:isoleucine biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0009099; P:valine biosynthetic process; IEA:UniProtKB-UniRule.
DR   HAMAP; MF_00435; IlvC; 1.
DR   InterPro; IPR008927; 6-PGluconate_DH-like_C_sf.
DR   InterPro; IPR013023; KARI.
DR   InterPro; IPR000506; KARI_C.
DR   InterPro; IPR013116; KARI_N.
DR   InterPro; IPR014359; KARI_prok.
DR   InterPro; IPR036291; NAD(P)-bd_dom_sf.
DR   PANTHER; PTHR21371; PTHR21371; 1.
DR   Pfam; PF01450; IlvC; 1.
DR   Pfam; PF07991; IlvN; 1.
DR   PIRSF; PIRSF000116; IlvC_gammaproteo; 1.
DR   SUPFAM; SSF48179; SSF48179; 1.
DR   SUPFAM; SSF51735; SSF51735; 1.
DR   TIGRFAMs; TIGR00465; ilvC; 1.
DR   PROSITE; PS51851; KARI_C; 1.
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.
FT   CHAIN           1..335
FT                   /note="Ketol-acid reductoisomerase (NADP(+)) 2"
FT                   /id="PRO_0000151271"
FT   DOMAIN          1..180
FT                   /note="KARI N-terminal Rossmann"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01197"
FT   DOMAIN          181..326
FT                   /note="KARI C-terminal knotted"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01198"
FT   ACT_SITE        106
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT   BINDING         24..27
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT   BINDING         47
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT   BINDING         51
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT   BINDING         81..84
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT   BINDING         132
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT   BINDING         189
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT   BINDING         189
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT   BINDING         193
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT   BINDING         225
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT   BINDING         229
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
FT   BINDING         250
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00435"
SQ   SEQUENCE   335 AA;  36918 MW;  EB73BC4965FF2003 CRC64;
     MKTYYEQDAN VGLLQGKTVA VIGYGSQGHA QAQNLRDSGV EVVVGVRPGK SFEVAKADGF
     EVMSVSEAVR TAQVVQMLLP DEQQAHVYKA EVEENLREGQ MLLFSHGFNI HFGQINPPSY
     VDVAMVAPKS PGHLVRRVFQ EGNGVPALVA VHQDATGTAL HVALAYAKGV GCTRAGVIET
     TFQEETETDL FGEQAVLCGG VTALVKAGFE TLTEGGYRPE IAYFECLHEL KLIVDLMYEG
     GLTNMRHSIS DTAEFGDYVT GSRIVTDETK KEMKRVLTEI QQGEFAKKWI LENQAGRPTY
     NAMKKAEQNH QLEKVGEELR EMMSWIHAPK ELVKK
 
 
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