ID W4M7P2_9BACT Unreviewed; 169 AA.
AC W4M7P2;
DT 19-MAR-2014, integrated into UniProtKB/TrEMBL.
DT 19-MAR-2014, sequence version 1.
DT 27-MAR-2024, entry version 29.
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=ETSY2_18435 {ECO:0000313|EMBL:ETX06225.1};
OS Candidatus Entotheonella gemina.
OC Bacteria; Nitrospinae/Tectomicrobia group; Candidatus Tectomicrobia;
OC Entotheonella.
OX NCBI_TaxID=1429439 {ECO:0000313|EMBL:ETX06225.1, ECO:0000313|Proteomes:UP000019140};
RN [1] {ECO:0000313|EMBL:ETX06225.1, ECO:0000313|Proteomes:UP000019140}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=TSY2 {ECO:0000313|Proteomes:UP000019140};
RX PubMed=24476823; DOI=10.1038/nature12959;
RA Wilson M.C., Mori T., Ruckert C., Uria A.R., Helf M.J., Takada K.,
RA Gernert C., Steffens U.A., Heycke N., Schmitt S., Rinke C., Helfrich E.J.,
RA Brachmann A.O., Gurgui C., Wakimoto T., Kracht M., Crusemann M.,
RA Hentschel U., Abe I., Matsunaga S., Kalinowski J., Takeyama H., Piel J.;
RT "An environmental bacterial taxon with a large and distinct metabolic
RT repertoire.";
RL Nature 506:58-62(2014).
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}.
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:ETX06225.1}.
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DR EMBL; AZHX01000755; ETX06225.1; -; Genomic_DNA.
DR AlphaFoldDB; W4M7P2; -.
DR PATRIC; fig|1429439.4.peg.3126; -.
DR HOGENOM; CLU_055003_1_3_7; -.
DR UniPathway; UPA00047; UER00055.
DR UniPathway; UPA00049; UER00059.
DR Proteomes; UP000019140; 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; PF13710; ACT_5; 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 Reference proteome {ECO:0000313|Proteomes:UP000019140};
KW Transferase {ECO:0000256|RuleBase:RU368092}.
FT DOMAIN 12..86
FT /note="ACT"
FT /evidence="ECO:0000259|PROSITE:PS51671"
SQ SEQUENCE 169 AA; 18834 MW; 58AA995599C87825 CRC64;
MPIDNDAVRR HTFAVLVENK FGVLGRITGL FSARGFNIES LSVAETEDPT VSRITLVTEG
DEKILEQVNK QLNRLIDVIK VTDLSEESHV DRELVLIKVH AEAESRAEVL RLADIFRAKI
VDVTPKTYIL EVTGDEGKIR ALIELLKPLG VKEVVRTGKI AIVRGNRVL
//
