ID C1DXG8_SULAA Unreviewed; 188 AA.
AC C1DXG8;
DT 26-MAY-2009, integrated into UniProtKB/TrEMBL.
DT 26-MAY-2009, sequence version 1.
DT 27-MAR-2024, entry version 76.
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:ACN99499.1};
GN OrderedLocusNames=SULAZ_0083 {ECO:0000313|EMBL:ACN99499.1};
OS Sulfurihydrogenibium azorense (strain Az-Fu1 / DSM 15241 / OCM 825).
OC Bacteria; Aquificota; Aquificae; Aquificales; Hydrogenothermaceae;
OC Sulfurihydrogenibium.
OX NCBI_TaxID=204536 {ECO:0000313|EMBL:ACN99499.1, ECO:0000313|Proteomes:UP000001369};
RN [1] {ECO:0000313|EMBL:ACN99499.1, ECO:0000313|Proteomes:UP000001369}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Az-Fu1 / DSM 15241 / OCM 825
RC {ECO:0000313|Proteomes:UP000001369};
RX PubMed=19136599; DOI=10.1128/JB.01645-08;
RA Reysenbach A.L., Hamamura N., Podar M., Griffiths E., Ferreira S.,
RA Hochstein R., Heidelberg J., Johnson J., Mead D., Pohorille A.,
RA Sarmiento M., Schweighofer K., Seshadri R., Voytek M.A.;
RT "Complete and draft genome sequences of six members of the Aquificales.";
RL J. Bacteriol. 191:1992-1993(2009).
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; CP001229; ACN99499.1; -; Genomic_DNA.
DR RefSeq; WP_012674812.1; NC_012438.1.
DR AlphaFoldDB; C1DXG8; -.
DR STRING; 204536.SULAZ_0083; -.
DR KEGG; saf:SULAZ_0083; -.
DR eggNOG; COG0440; Bacteria.
DR HOGENOM; CLU_055003_1_3_0; -.
DR OrthoDB; 9787365at2; -.
DR UniPathway; UPA00047; UER00055.
DR UniPathway; UPA00049; UER00059.
DR Proteomes; UP000001369; Chromosome.
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 Reference proteome {ECO:0000313|Proteomes:UP000001369};
KW Transferase {ECO:0000256|RuleBase:RU368092, ECO:0000313|EMBL:ACN99499.1}.
FT DOMAIN 21..95
FT /note="ACT"
FT /evidence="ECO:0000259|PROSITE:PS51671"
SQ SEQUENCE 188 AA; 21502 MW; 4EB43EB519F47C18 CRC64;
MSEIKVIKER PQPEKKIGRH VITVKVQHNF GVLARITGLF AGRGYNIESL TVGRTHEPHI
ARITIVVEGD ERVIEQIIKQ LRKLIETLRV RDITDIPHIE RELALIKIHT ENDRTRDEIM
RLVNIFRAKV VDVSTDTYTV EITGDEDKIE AFISLIKPFG IKEMARTGTL AMVRESATSK
ILPGERFD
//
