ID E2SPC6_9FIRM Unreviewed; 170 AA.
AC E2SPC6;
DT 11-JAN-2011, integrated into UniProtKB/TrEMBL.
DT 11-JAN-2011, sequence version 1.
DT 27-MAR-2024, entry version 47.
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 Name=ilvN {ECO:0000313|EMBL:EFP60626.1};
GN ORFNames=HMPREF0983_03027 {ECO:0000313|EMBL:EFP60626.1};
OS Erysipelotrichaceae bacterium 3_1_53.
OC Bacteria; Bacillota; Erysipelotrichia; Erysipelotrichales;
OC Erysipelotrichaceae.
OX NCBI_TaxID=658659 {ECO:0000313|EMBL:EFP60626.1, ECO:0000313|Proteomes:UP000006223};
RN [1] {ECO:0000313|EMBL:EFP60626.1, ECO:0000313|Proteomes:UP000006223}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=3_1_53 {ECO:0000313|EMBL:EFP60626.1,
RC ECO:0000313|Proteomes:UP000006223};
RG The Broad Institute Genome Sequencing Platform;
RA Ward D., Earl A., Feldgarden M., Young S.K., Pearson M., Zeng Q.,
RA Alvarado L., Berlin A., Bochicchio J., Chapman S.B., Chen Z., Freedman E.,
RA Gellesch M., Goldberg J., Griggs A., Gujja S., Heilman E., Heiman D.,
RA Howarth C., Jen D., Larson L., Mehta T., Neiman D., Park D., Roberts A.,
RA Saif S., Shea T., Shenoy N., Sisk P., Stolte C., Sykes S., Thomson T.,
RA Walk T., White J., Yandava C., Allen-Vercoe E., Strauss J., Sibley C.,
RA Daigneault M., Haas B., Nusbaum C., Birren B.;
RT "The Genome Sequence of Erysipelotrichaceae bacterium strain 3_1_53.";
RL Submitted (JUL-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}.
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:EFP60626.1}.
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DR EMBL; ACTJ01000068; EFP60626.1; -; Genomic_DNA.
DR AlphaFoldDB; E2SPC6; -.
DR STRING; 658659.HMPREF0983_03027; -.
DR eggNOG; COG0440; Bacteria.
DR HOGENOM; CLU_055003_1_4_9; -.
DR UniPathway; UPA00047; UER00055.
DR UniPathway; UPA00049; UER00059.
DR Proteomes; UP000006223; 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, ECO:0000313|EMBL:EFP60626.1}.
FT DOMAIN 10..84
FT /note="ACT"
FT /evidence="ECO:0000259|PROSITE:PS51671"
SQ SEQUENCE 170 AA; 19344 MW; 553568BFD3FD956F CRC64;
MNGNGMKKRW ISLYVENQIG VLSKISGLFS GKSYNLDSLT VGTTEDPTIS RMTIATVSDD
ETFEQIKKQL NRLVEVIKVI DFTDIFVRMK EILYVKVQNC TLQEKTELFQ IAQTFKAKVI
DYGRDSLLLE FVQTATKNDA VIKLMKEEFK NIEVVRGGSV GIESISMMER
//
