ID D5ES00_PRER2 Unreviewed; 568 AA.
AC D5ES00;
DT 15-JUN-2010, integrated into UniProtKB/TrEMBL.
DT 15-JUN-2010, sequence version 1.
DT 27-MAR-2024, entry version 73.
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:ADE83010.1};
GN OrderedLocusNames=PRU_1077 {ECO:0000313|EMBL:ADE83010.1};
OS Prevotella ruminicola (strain ATCC 19189 / JCM 8958 / 23).
OC Bacteria; Bacteroidota; Bacteroidia; Bacteroidales; Prevotellaceae;
OC Xylanibacter.
OX NCBI_TaxID=264731 {ECO:0000313|EMBL:ADE83010.1, ECO:0000313|Proteomes:UP000000927};
RN [1] {ECO:0000313|EMBL:ADE83010.1, ECO:0000313|Proteomes:UP000000927}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 19189 / JCM 8958 / 23 {ECO:0000313|Proteomes:UP000000927};
RX PubMed=20585943; DOI=10.1007/s00248-010-9692-8;
RG North American Consortium for Rumen Bacteria;
RA Purushe J., Fouts D.E., Morrison M., White B.A., Mackie R.I.,
RA Coutinho P.M., Henrissat B., Nelson K.E.;
RT "Comparative genome analysis of Prevotella ruminicola and Prevotella
RT bryantii: insights into their environmental niche.";
RL Microb. Ecol. 60:721-729(2010).
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; CP002006; ADE83010.1; -; Genomic_DNA.
DR AlphaFoldDB; D5ES00; -.
DR STRING; 264731.PRU_1077; -.
DR KEGG; pru:PRU_1077; -.
DR eggNOG; COG0028; Bacteria.
DR HOGENOM; CLU_013748_1_2_10; -.
DR UniPathway; UPA00047; UER00055.
DR UniPathway; UPA00049; UER00059.
DR Proteomes; UP000000927; Chromosome.
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; IPR045229; TPP_enz.
DR InterPro; IPR011766; TPP_enzyme_TPP-bd.
DR NCBIfam; TIGR00118; acolac_lg; 1.
DR PANTHER; PTHR18968:SF13; ACETOLACTATE SYNTHASE CATALYTIC SUBUNIT, MITOCHONDRIAL; 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.
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 Reference proteome {ECO:0000313|Proteomes:UP000000927};
KW Thiamine pyrophosphate {ECO:0000256|RuleBase:RU003591};
KW Transferase {ECO:0000256|RuleBase:RU003591, ECO:0000313|EMBL:ADE83010.1}.
FT DOMAIN 6..125
FT /note="Thiamine pyrophosphate enzyme N-terminal TPP-
FT binding"
FT /evidence="ECO:0000259|Pfam:PF02776"
FT DOMAIN 200..334
FT /note="Thiamine pyrophosphate enzyme central"
FT /evidence="ECO:0000259|Pfam:PF00205"
FT DOMAIN 396..543
FT /note="Thiamine pyrophosphate enzyme TPP-binding"
FT /evidence="ECO:0000259|Pfam:PF02775"
SQ SEQUENCE 568 AA; 62617 MW; 6AB20D17DE562C7F CRC64;
MKDRITGAKA LMRALKAEGV KTIFGYPGGS IMPTYDALFD YTRGEKKCFD HILVRHEQGA
THAAEGYARV SGEVGVVLVT SGPGVTNTLT GIADAMMDST PIVVIAGQVP TGALGTDFFQ
EVDLVGVSQP ISKWSYQIRH AEDVAWAVSR AFYIARTGRP GPVVLDFTKN AQVEEIDWEP
MKCDFIRSYV PYPKLDNEAV RKAAELINNA KKPLALVGQG VELGNAQKEL QAFLEKADIP
AGRTMLGLSA LPSNHPLNVG MLGMHGNYAV NLKEQECDVL IAIGMRFSDR VTGNLKTYAK
QAKIIHLDID RSEIDKNVKT DVAVVADCKE SLPAITALIE ANDHQKWRDS FKELDAMERE
KVIEPAIHPT EGPLKMGEVV NVVAEMSPDD TILVTDVGQN QLFATRYFKY HHKRSLCTSG
GLGTMGYGLP AAIGATFADP NRTVCCFMGD GGFQMCIQEL GTIMEQQKPV KMIVMNNHYL
GNVRQWQDMF WMRRKSFTKM MNPNYELIAK GYGINYAAAV DRKDLPGLVK KMLTTDGPFL
LECAILEEDN VLPMTPPGMD VDKMQLEI
//
