ID E1WWB3_BACF6 Unreviewed; 565 AA.
AC E1WWB3;
DT 30-NOV-2010, integrated into UniProtKB/TrEMBL.
DT 30-NOV-2010, sequence version 1.
DT 27-MAR-2024, entry version 68.
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:CBW24031.1};
GN OrderedLocusNames=BF638R_3577 {ECO:0000313|EMBL:CBW24031.1};
OS Bacteroides fragilis (strain 638R).
OC Bacteria; Bacteroidota; Bacteroidia; Bacteroidales; Bacteroidaceae;
OC Bacteroides.
OX NCBI_TaxID=862962 {ECO:0000313|EMBL:CBW24031.1, ECO:0000313|Proteomes:UP000008560};
RN [1] {ECO:0000313|EMBL:CBW24031.1, ECO:0000313|Proteomes:UP000008560}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=638R {ECO:0000313|EMBL:CBW24031.1,
RC ECO:0000313|Proteomes:UP000008560};
RX PubMed=20829291; DOI=10.1099/mic.0.042978-0;
RA Patrick S., Blakely G.W., Houston S., Moore J., Abratt V.R., Bertalan M.,
RA Cerdeno-Tarraga A.M., Quail M.A., Corton N., Corton C., Bignell A.,
RA Barron A., Clark L., Bentley S.D., Parkhill J.;
RT "Twenty-eight divergent polysaccharide loci specifying within- and amongst-
RT strain capsule diversity in three strains of Bacteroides fragilis.";
RL Microbiology 156:3255-3269(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; FQ312004; CBW24031.1; -; Genomic_DNA.
DR RefSeq; WP_005790701.1; NC_016776.1.
DR AlphaFoldDB; E1WWB3; -.
DR KEGG; bfg:BF638R_3577; -.
DR PATRIC; fig|862962.3.peg.3709; -.
DR HOGENOM; CLU_013748_1_2_10; -.
DR UniPathway; UPA00047; UER00055.
DR UniPathway; UPA00049; UER00059.
DR Proteomes; UP000008560; 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 Thiamine pyrophosphate {ECO:0000256|RuleBase:RU003591};
KW Transferase {ECO:0000256|RuleBase:RU003591, ECO:0000313|EMBL:CBW24031.1}.
FT DOMAIN 7..123
FT /note="Thiamine pyrophosphate enzyme N-terminal TPP-
FT binding"
FT /evidence="ECO:0000259|Pfam:PF02776"
FT DOMAIN 197..331
FT /note="Thiamine pyrophosphate enzyme central"
FT /evidence="ECO:0000259|Pfam:PF00205"
FT DOMAIN 393..539
FT /note="Thiamine pyrophosphate enzyme TPP-binding"
FT /evidence="ECO:0000259|Pfam:PF02775"
SQ SEQUENCE 565 AA; 61273 MW; 7EF40725B31B2E6F CRC64;
MSKDIISGGE ALMRSLEYHG VKTIFGYPGG SIMPVFDALY DHRETLNHIL VRHEQGAAHA
AQGFARASGE VGVCLVTSGP GATNTITGIA DAMIDSTPIV VIAGQVGTAF LGTDAFQEVD
LVGITQPITK WSYQIRRAED VPWAVARAFY IAKSGRPGPV VLDFAKNAQV EKAEYMPAKL
DFIRSYVPVP ETDPEAVKAA AELINGAERP LVLVGQGVEL GNAQQELRAF IEKADMPAGC
TLLGLSALPT EHPLNKGMLG MHGNLGPNMN TNKCDVLIAV GMRFDDRVTG NLATYAKQAK
VIHFDIDPAE INKNVHADVA VLGNCKETLS AVTALLQPNE HKEWLDSFLP YEQVEEEKVI
RPELHPMGDT LSMGEVVRAV SDATNHEAIL VTDVGQNQMM SARYFKYSKD RSMITSGGLG
TMGFGLPAAI GATFGRPDRT VCVFMGDGGL QMNIQELGTI MEQKAPVKII VLNNNFLGNV
RQWQAMFFNR KYSFTPMLNP DYIKIASAYD IPAKRVFTRE ELADAIDEMI ATDGPFLLEA
CVIEEGNVLP MTPPGGSVNQ MLLEC
//
