ID D7IBR1_9BACE Unreviewed; 187 AA.
AC D7IBR1;
DT 10-AUG-2010, integrated into UniProtKB/TrEMBL.
DT 10-AUG-2010, sequence version 1.
DT 27-MAR-2024, entry version 46.
DE RecName: Full=Acetolactate synthase small subunit {ECO:0000256|RuleBase:RU368092};
DE Short=AHAS {ECO:0000256|RuleBase:RU368092};
DE Short=ALS {ECO:0000256|RuleBase:RU368092};
DE EC=2.2.1.6 {ECO:0000256|RuleBase:RU368092};
DE AltName: Full=Acetohydroxy-acid synthase small subunit {ECO:0000256|RuleBase:RU368092};
GN ORFNames=HMPREF9007_01708 {ECO:0000313|EMBL:EFI05066.1};
OS Bacteroides sp. 1_1_14.
OC Bacteria; Bacteroidota; Bacteroidia; Bacteroidales; Bacteroidaceae;
OC Bacteroides.
OX NCBI_TaxID=469585 {ECO:0000313|EMBL:EFI05066.1, ECO:0000313|Proteomes:UP000003951};
RN [1] {ECO:0000313|EMBL:EFI05066.1, ECO:0000313|Proteomes:UP000003951}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=1_1_14 {ECO:0000313|EMBL:EFI05066.1,
RC ECO:0000313|Proteomes:UP000003951};
RG The Broad Institute Genome Sequencing Platform;
RA Ward D., Earl A., Feldgarden M., Gevers D., Young S.K., Zeng Q.,
RA Koehrsen M., Alvarado L., Berlin A., Bochicchio J., Borenstein D.,
RA Chapman S.B., Chen Z., Engels R., Freedman E., Gellesch M., Goldberg J.,
RA Griggs A., Gujja S., Heilman E., Heiman D., Hepburn T., Howarth C., Jen D.,
RA Larson L., Mehta T., Park D., Pearson M., Roberts A., Saif S., Shea T.,
RA Shenoy N., Sisk P., Stolte C., Sykes S., Thomson T., Walk T., White J.,
RA Yandava C., Strauss J., Daigneault M., McDonald J., Ambrose C.E.,
RA Allen-Vercoe E., Haas B., Nusbaum C., Birren B.;
RT "The Genome Sequence of Bacteroides sp. strain 1_1_14.";
RL Submitted (MAR-2010) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Catalyzes the conversion of 2 pyruvate molecules into
CC acetolactate in the first common step of the biosynthetic pathway of
CC the branched-amino acids such as leucine, isoleucine, and valine.
CC {ECO:0000256|RuleBase:RU368092}.
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|ARBA:ARBA00000673,
CC ECO:0000256|RuleBase:RU368092};
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:RU368092}.
CC -!- PATHWAY: Amino-acid biosynthesis; L-valine biosynthesis; L-valine from
CC pyruvate: step 1/4. {ECO:0000256|ARBA:ARBA00005025,
CC ECO:0000256|RuleBase:RU368092}.
CC -!- SUBUNIT: Dimer of large and small chains.
CC {ECO:0000256|ARBA:ARBA00011744, ECO:0000256|RuleBase:RU368092}.
CC -!- SIMILARITY: Belongs to the acetolactate synthase small subunit family.
CC {ECO:0000256|ARBA:ARBA00006341, ECO:0000256|RuleBase:RU368092}.
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DR EMBL; GG774704; EFI05066.1; -; Genomic_DNA.
DR RefSeq; WP_008761035.1; NZ_GG774704.1.
DR AlphaFoldDB; D7IBR1; -.
DR SMR; D7IBR1; -.
DR GeneID; 60928065; -.
DR HOGENOM; CLU_055003_3_1_10; -.
DR UniPathway; UPA00047; UER00055.
DR UniPathway; UPA00049; UER00059.
DR Proteomes; UP000003951; Unassembled WGS sequence.
DR GO; GO:0003984; F:acetolactate synthase activity; IEA:UniProtKB-UniRule.
DR GO; GO:1990610; F:acetolactate synthase regulator activity; IEA:UniProtKB-UniRule.
DR GO; GO:0009097; P:isoleucine biosynthetic process; IEA:UniProtKB-UniRule.
DR GO; GO:0009099; P:valine biosynthetic process; IEA:UniProtKB-UniRule.
DR CDD; cd04878; ACT_AHAS; 1.
DR Gene3D; 3.30.70.260; -; 1.
DR Gene3D; 3.30.70.1150; ACT-like. Chain A, domain 2; 1.
DR InterPro; IPR004789; Acetalactate_synth_ssu.
DR InterPro; IPR027271; Acetolactate_synth/TF_NikR_C.
DR InterPro; IPR019455; Acetolactate_synth_ssu_C.
DR InterPro; IPR045865; ACT-like_dom_sf.
DR InterPro; IPR002912; ACT_dom.
DR InterPro; IPR039557; AHAS_ACT.
DR NCBIfam; TIGR00119; acolac_sm; 1.
DR PANTHER; PTHR30239; ACETOLACTATE SYNTHASE SMALL SUBUNIT; 1.
DR PANTHER; PTHR30239:SF0; ACETOLACTATE SYNTHASE SMALL SUBUNIT 1, CHLOROPLASTIC; 1.
DR Pfam; PF01842; ACT; 1.
DR Pfam; PF10369; ALS_ss_C; 1.
DR SUPFAM; SSF55021; ACT-like; 2.
DR PROSITE; PS51671; ACT; 1.
PE 3: Inferred from homology;
KW Amino-acid biosynthesis {ECO:0000256|ARBA:ARBA00022605,
KW ECO:0000256|RuleBase:RU368092};
KW Branched-chain amino acid biosynthesis {ECO:0000256|ARBA:ARBA00023304,
KW ECO:0000256|RuleBase:RU368092};
KW Transferase {ECO:0000256|RuleBase:RU368092}.
FT DOMAIN 8..82
FT /note="ACT"
FT /evidence="ECO:0000259|PROSITE:PS51671"
SQ SEQUENCE 187 AA; 21517 MW; 1DFD8ED54AA828A3 CRC64;
MSDKTLYTII VHSENIAGLL NQVTAVFTRR QINIESLNVS ASSIKGVHKY TITAWTDKDT
IEKVVKQIEK KIDVIQAHYF TEDEIYFHEI ALYKVSTPAF QETPEASKVI RRYNARIVEV
NPVFSIVEKN GMSEEITSLY EELRALKCVL QFVRSGRVAI TTSCFERVNE FLDGQEAKYK
QSKKEQE
//
