ID B8L933_9GAMM Unreviewed; 578 AA.
AC B8L933;
DT 03-MAR-2009, integrated into UniProtKB/TrEMBL.
DT 03-MAR-2009, sequence version 1.
DT 24-JAN-2024, entry version 75.
DE RecName: Full=Acetolactate synthase {ECO:0000256|ARBA:ARBA00013145, ECO:0000256|RuleBase:RU003591};
DE EC=2.2.1.6 {ECO:0000256|ARBA:ARBA00013145, ECO:0000256|RuleBase:RU003591};
GN Name=ilvB {ECO:0000313|EMBL:EED37917.1};
GN ORFNames=SSKA14_926 {ECO:0000313|EMBL:EED37917.1};
OS Stenotrophomonas sp. SKA14.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Xanthomonadales;
OC Xanthomonadaceae; Stenotrophomonas.
OX NCBI_TaxID=391601 {ECO:0000313|EMBL:EED37917.1};
RN [1] {ECO:0000313|EMBL:EED37917.1}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=SKA14 {ECO:0000313|EMBL:EED37917.1};
RA Hagstrom A., Ferriera S., Johnson J., Kravitz S., Beeson K., Sutton G.,
RA Rogers Y.-H., Friedman R., Frazier M., Venter J.C.;
RL Submitted (DEC-2008) to the EMBL/GenBank/DDBJ databases.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=H(+) + 2 pyruvate = (2S)-2-acetolactate + CO2;
CC Xref=Rhea:RHEA:25249, ChEBI:CHEBI:15361, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:16526, ChEBI:CHEBI:58476; EC=2.2.1.6;
CC Evidence={ECO:0000256|RuleBase:RU003591};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|RuleBase:RU003591};
CC Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000256|RuleBase:RU003591};
CC -!- COFACTOR:
CC Name=thiamine diphosphate; Xref=ChEBI:CHEBI:58937;
CC Evidence={ECO:0000256|RuleBase:RU003591};
CC Note=Binds 1 thiamine pyrophosphate per subunit.
CC {ECO:0000256|RuleBase:RU003591};
CC -!- PATHWAY: Amino-acid biosynthesis; L-isoleucine biosynthesis; L-
CC isoleucine from 2-oxobutanoate: step 1/4.
CC {ECO:0000256|ARBA:ARBA00004974, ECO:0000256|RuleBase:RU003591}.
CC -!- PATHWAY: Amino-acid biosynthesis; L-valine biosynthesis; L-valine from
CC pyruvate: step 1/4. {ECO:0000256|ARBA:ARBA00005025,
CC ECO:0000256|RuleBase:RU003591}.
CC -!- SIMILARITY: Belongs to the TPP enzyme family.
CC {ECO:0000256|ARBA:ARBA00007812, ECO:0000256|RuleBase:RU003591}.
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DR EMBL; DS999412; EED37917.1; -; Genomic_DNA.
DR RefSeq; WP_008265308.1; NZ_DS999412.1.
DR AlphaFoldDB; B8L933; -.
DR HOGENOM; CLU_013748_3_1_6; -.
DR UniPathway; UPA00047; UER00055.
DR UniPathway; UPA00049; UER00059.
DR Proteomes; UP000003991; Unassembled WGS sequence.
DR GO; GO:0003984; F:acetolactate synthase activity; IEA:UniProtKB-EC.
DR GO; GO:0050660; F:flavin adenine dinucleotide binding; IEA:InterPro.
DR GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0030976; F:thiamine pyrophosphate binding; IEA:UniProtKB-UniRule.
DR GO; GO:0009097; P:isoleucine biosynthetic process; IEA:UniProtKB-UniPathway.
DR GO; GO:0009099; P:valine biosynthetic process; IEA:UniProtKB-UniPathway.
DR CDD; cd02015; TPP_AHAS; 1.
DR CDD; cd07035; TPP_PYR_POX_like; 1.
DR Gene3D; 3.40.50.970; -; 2.
DR Gene3D; 3.40.50.1220; TPP-binding domain; 1.
DR InterPro; IPR012846; Acetolactate_synth_lsu.
DR InterPro; IPR039368; AHAS_TPP.
DR InterPro; IPR029035; DHS-like_NAD/FAD-binding_dom.
DR InterPro; IPR029061; THDP-binding.
DR InterPro; IPR012000; Thiamin_PyroP_enz_cen_dom.
DR InterPro; IPR012001; Thiamin_PyroP_enz_TPP-bd_dom.
DR InterPro; IPR000399; TPP-bd_CS.
DR InterPro; IPR045229; TPP_enz.
DR InterPro; IPR011766; TPP_enzyme_TPP-bd.
DR NCBIfam; TIGR00118; acolac_lg; 1.
DR PANTHER; PTHR18968:SF142; ACETOLACTATE SYNTHASE; 1.
DR PANTHER; PTHR18968; THIAMINE PYROPHOSPHATE ENZYMES; 1.
DR Pfam; PF02775; TPP_enzyme_C; 1.
DR Pfam; PF00205; TPP_enzyme_M; 1.
DR Pfam; PF02776; TPP_enzyme_N; 1.
DR SUPFAM; SSF52467; DHS-like NAD/FAD-binding domain; 1.
DR SUPFAM; SSF52518; Thiamin diphosphate-binding fold (THDP-binding); 2.
DR PROSITE; PS00187; TPP_ENZYMES; 1.
PE 3: Inferred from homology;
KW Amino-acid biosynthesis {ECO:0000256|ARBA:ARBA00022605,
KW ECO:0000256|RuleBase:RU003591};
KW Branched-chain amino acid biosynthesis {ECO:0000256|ARBA:ARBA00023304,
KW ECO:0000256|RuleBase:RU003591}; Magnesium {ECO:0000256|RuleBase:RU003591};
KW Metal-binding {ECO:0000256|RuleBase:RU003591};
KW Thiamine pyrophosphate {ECO:0000256|RuleBase:RU003591};
KW Transferase {ECO:0000256|RuleBase:RU003591, ECO:0000313|EMBL:EED37917.1}.
FT DOMAIN 12..125
FT /note="Thiamine pyrophosphate enzyme N-terminal TPP-
FT binding"
FT /evidence="ECO:0000259|Pfam:PF02776"
FT DOMAIN 198..333
FT /note="Thiamine pyrophosphate enzyme central"
FT /evidence="ECO:0000259|Pfam:PF00205"
FT DOMAIN 391..539
FT /note="Thiamine pyrophosphate enzyme TPP-binding"
FT /evidence="ECO:0000259|Pfam:PF02775"
FT REGION 558..578
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ SEQUENCE 578 AA; 61300 MW; AA6F0AC766220C60 CRC64;
MNSSTHRSAP PNGARWLTQA LEAEGVRTLF GYPGGTIMPF YDALVDSSLK HILVRHEQGA
ALAANGFARA SGQVGVCVAT SGPGASNLVT GIADAMLDSV PMVCITGQVA TPLLGTDAFQ
ELDVFGLTMP IVKHSWLVRS VDDLPRVVTD AFRIAREGRP GPVLIDLPKD VQLADASHLP
AHVPSSVEPP PAPAEAAIAE AIAALAAAEK PVVYAGGGIA LGDAVQDLRD FVEASAIPTV
MTLRGLGALP ASHPQSLGML GMHGTRAANM AVQESDLLLV LGARFDDRAT GKLAEFAPFA
RVVHIDADAY EISKLRSADV AVPGNVRHAI RALRAAFPSP KAHQDAWRRR CAQHRDRFAA
RYDAPGQHIY APALLKRLSE LAPADAVIAC DVGQHQMWVA QHCRFNHPRN HLTSGALGTM
GFGLPAAMGA QFACPERTVV LVSGDGSFMM NVQELATIAR CRLPVKIVLL DNSSLGMVRQ
WQELFFAERY SEIDLSDNPD FVALAQVFGI AATRIDARDD VEGGLAALLA EPGPALLHVA
IDARANVWPL VPPNTANSTM LESNPAHARQ ETPNAIPA
//