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Database: UniProt
Entry: W9UT73_9GAMM
LinkDB: W9UT73_9GAMM
Original site: W9UT73_9GAMM 
ID   W9UT73_9GAMM            Unreviewed;       338 AA.
AC   W9UT73;
DT   14-MAY-2014, integrated into UniProtKB/TrEMBL.
DT   14-MAY-2014, sequence version 1.
DT   24-JAN-2024, entry version 54.
DE   RecName: Full=Ketol-acid reductoisomerase (NADP(+)) {ECO:0000256|HAMAP-Rule:MF_00435};
DE            Short=KARI {ECO:0000256|HAMAP-Rule:MF_00435};
DE            EC=1.1.1.86 {ECO:0000256|HAMAP-Rule:MF_00435};
DE   AltName: Full=Acetohydroxy-acid isomeroreductase {ECO:0000256|HAMAP-Rule:MF_00435};
DE            Short=AHIR {ECO:0000256|HAMAP-Rule:MF_00435};
DE   AltName: Full=Alpha-keto-beta-hydroxylacyl reductoisomerase {ECO:0000256|HAMAP-Rule:MF_00435};
GN   Name=ilvC {ECO:0000256|HAMAP-Rule:MF_00435,
GN   ECO:0000313|EMBL:EXJ10423.1};
GN   ORFNames=D791_02751 {ECO:0000313|EMBL:EXJ10423.1};
OS   Nitrincola nitratireducens.
OC   Bacteria; Pseudomonadota; Gammaproteobacteria; Oceanospirillales;
OC   Oceanospirillaceae; Nitrincola.
OX   NCBI_TaxID=1229521 {ECO:0000313|EMBL:EXJ10423.1, ECO:0000313|Proteomes:UP000019464};
RN   [1] {ECO:0000313|Proteomes:UP000019464}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=AK23 {ECO:0000313|Proteomes:UP000019464};
RA   Singh A., Pinnaka A.K., Vaidya B.;
RL   Submitted (NOV-2012) to the EMBL/GenBank/DDBJ databases.
RN   [2] {ECO:0000313|EMBL:EXJ10423.1, ECO:0000313|Proteomes:UP000019464}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=AK23 {ECO:0000313|EMBL:EXJ10423.1,
RC   ECO:0000313|Proteomes:UP000019464};
RX   PubMed=26481633; DOI=10.1016/j.syapm.2015.09.002;
RA   Singh A., Vaidya B., Tanuku N.R., Pinnaka A.K.;
RT   "Nitrincola nitratireducens sp. nov. isolated from a haloalkaline crater
RT   lake.";
RL   Syst. Appl. Microbiol. 38:555-562(2015).
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:0000256|ARBA:ARBA00002172, ECO:0000256|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;
CC         Evidence={ECO:0000256|ARBA:ARBA00000507, ECO:0000256|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:0000256|HAMAP-Rule:MF_00435};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000256|HAMAP-Rule:MF_00435};
CC       Note=Binds 2 magnesium ions per subunit. {ECO:0000256|HAMAP-
CC       Rule:MF_00435};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-isoleucine biosynthesis; L-
CC       isoleucine from 2-oxobutanoate: step 2/4.
CC       {ECO:0000256|ARBA:ARBA00004885, ECO:0000256|HAMAP-Rule:MF_00435}.
CC   -!- PATHWAY: Amino-acid biosynthesis; L-valine biosynthesis; L-valine from
CC       pyruvate: step 2/4. {ECO:0000256|ARBA:ARBA00004864, ECO:0000256|HAMAP-
CC       Rule:MF_00435}.
CC   -!- SIMILARITY: Belongs to the ketol-acid reductoisomerase family.
CC       {ECO:0000256|ARBA:ARBA00010318, ECO:0000256|HAMAP-Rule:MF_00435,
CC       ECO:0000256|PROSITE-ProRule:PRU01198}.
CC   -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC       feature annotation. {ECO:0000256|HAMAP-Rule:MF_00435}.
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:EXJ10423.1}.
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DR   EMBL; AONB01000014; EXJ10423.1; -; Genomic_DNA.
DR   RefSeq; WP_036512158.1; NZ_AONB01000014.1.
DR   AlphaFoldDB; W9UT73; -.
DR   STRING; 1229521.D791_02751; -.
DR   PATRIC; fig|1229521.3.peg.2780; -.
DR   OrthoDB; 9804088at2; -.
DR   UniPathway; UPA00047; UER00056.
DR   UniPathway; UPA00049; UER00060.
DR   Proteomes; UP000019464; Unassembled WGS sequence.
DR   GO; GO:0016853; F:isomerase activity; IEA:UniProtKB-KW.
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   Gene3D; 6.10.240.10; -; 1.
DR   Gene3D; 3.40.50.720; NAD(P)-binding Rossmann-like Domain; 1.
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   NCBIfam; TIGR00465; ilvC; 1.
DR   PANTHER; PTHR21371; KETOL-ACID REDUCTOISOMERASE, MITOCHONDRIAL; 1.
DR   PANTHER; PTHR21371:SF1; KETOL-ACID REDUCTOISOMERASE, MITOCHONDRIAL; 1.
DR   Pfam; PF01450; IlvC; 1.
DR   Pfam; PF07991; IlvN; 1.
DR   PIRSF; PIRSF000116; IlvC_gammaproteo; 2.
DR   SUPFAM; SSF48179; 6-phosphogluconate dehydrogenase C-terminal domain-like; 1.
DR   SUPFAM; SSF51735; NAD(P)-binding Rossmann-fold domains; 1.
DR   PROSITE; PS51851; KARI_C; 1.
DR   PROSITE; PS51850; KARI_N; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis {ECO:0000256|ARBA:ARBA00022605, ECO:0000256|HAMAP-
KW   Rule:MF_00435};
KW   Branched-chain amino acid biosynthesis {ECO:0000256|ARBA:ARBA00023304,
KW   ECO:0000256|HAMAP-Rule:MF_00435}; Isomerase {ECO:0000313|EMBL:EXJ10423.1};
KW   Magnesium {ECO:0000256|ARBA:ARBA00022842, ECO:0000256|HAMAP-Rule:MF_00435};
KW   Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP-
KW   Rule:MF_00435}; NADP {ECO:0000256|HAMAP-Rule:MF_00435};
KW   Oxidoreductase {ECO:0000256|ARBA:ARBA00023002, ECO:0000256|HAMAP-
KW   Rule:MF_00435}.
FT   DOMAIN          1..181
FT                   /note="KARI N-terminal Rossmann"
FT                   /evidence="ECO:0000259|PROSITE:PS51850"
FT   DOMAIN          182..327
FT                   /note="KARI C-terminal knotted"
FT                   /evidence="ECO:0000259|PROSITE:PS51851"
FT   ACT_SITE        107
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00435"
FT   BINDING         24..27
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00435"
FT   BINDING         47
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00435"
FT   BINDING         50
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00435"
FT   BINDING         52
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00435"
FT   BINDING         133
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00435"
FT   BINDING         190
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00435,
FT                   ECO:0000256|PROSITE-ProRule:PRU01198"
FT   BINDING         190
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00435,
FT                   ECO:0000256|PROSITE-ProRule:PRU01198"
FT   BINDING         194
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00435,
FT                   ECO:0000256|PROSITE-ProRule:PRU01198"
FT   BINDING         226
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00435,
FT                   ECO:0000256|PROSITE-ProRule:PRU01198"
FT   BINDING         230
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00435,
FT                   ECO:0000256|PROSITE-ProRule:PRU01198"
FT   BINDING         251
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00435,
FT                   ECO:0000256|PROSITE-ProRule:PRU01198"
SQ   SEQUENCE   338 AA;  36509 MW;  CF09FCFEC4D9910D CRC64;
     MKVYYDKDCD LSIIQGKKVS IIGYGSQGHA HACNLKDSGV DVTVGLRPGS SSRAKAEAAG
     LKVADVPAAV AAADLVMILT PDEFQGQLYK AEIEPNIKQG ATLAFAHGFS IHYNQVEPRK
     DLDVIMIAPK APGHTVRSEF VKGGGIPDLV AIFQDASGNA KNVALSYAAG VGGGRTGIIE
     TTFKDETETD LFGEQAVLCG GCVELVKMGF ETLVEAGYAP EMAYFECLHE LKLIVDLMYE
     GGIANMNYSI SNNAEYGEYV TGPEVINEQS REAMRNALKR IQNGEYAKMF ISEGATNYPS
     MTARRRNNAA HPIEQVGGKL REMMPWITAN QLVDKSKN
//
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