ID Q888N5_PSESM Unreviewed; 163 AA.
AC Q888N5;
DT 01-JUN-2003, integrated into UniProtKB/TrEMBL.
DT 01-JUN-2003, sequence version 1.
DT 27-MAR-2024, entry version 115.
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:AAO54516.1};
GN OrderedLocusNames=PSPTO_0982 {ECO:0000313|EMBL:AAO54516.1};
OS Pseudomonas syringae pv. tomato (strain ATCC BAA-871 / DC3000).
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Pseudomonadales;
OC Pseudomonadaceae; Pseudomonas.
OX NCBI_TaxID=223283 {ECO:0000313|EMBL:AAO54516.1, ECO:0000313|Proteomes:UP000002515};
RN [1] {ECO:0000313|EMBL:AAO54516.1, ECO:0000313|Proteomes:UP000002515}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC BAA-871 / DC3000 {ECO:0000313|Proteomes:UP000002515};
RX PubMed=12928499; DOI=10.1073/pnas.1731982100;
RA Buell C.R., Joardar V., Lindeberg M., Selengut J., Paulsen I.T.,
RA Gwinn M.L., Dodson R.J., Deboy R.T., Durkin A.S., Kolonay J.F., Madupu R.,
RA Daugherty S., Brinkac L., Beanan M.J., Haft D.H., Nelson W.C., Davidsen T.,
RA Zafar N., Zhou L., Liu J., Yuan Q., Khouri H., Fedorova N., Tran B.,
RA Russell D., Berry K., Utterback T., Van Aken S.E., Feldblyum T.V.,
RA D'Ascenzo M., Deng W.L., Ramos A.R., Alfano J.R., Cartinhour S.,
RA Chatterjee A.K., Delaney T.P., Lazarowitz S.G., Martin G.B.,
RA Schneider D.J., Tang X., Bender C.L., White O., Fraser C.M., Collmer A.;
RT "The complete genome sequence of the Arabidopsis and tomato pathogen
RT Pseudomonas syringae pv. tomato DC3000.";
RL Proc. Natl. Acad. Sci. U.S.A. 100:10181-10186(2003).
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; AE016853; AAO54516.1; -; Genomic_DNA.
DR RefSeq; NP_790821.1; NC_004578.1.
DR RefSeq; WP_002552075.1; NC_004578.1.
DR AlphaFoldDB; Q888N5; -.
DR SMR; Q888N5; -.
DR STRING; 223283.PSPTO_0982; -.
DR GeneID; 77276790; -.
DR KEGG; pst:PSPTO_0982; -.
DR PATRIC; fig|223283.9.peg.991; -.
DR eggNOG; COG0440; Bacteria.
DR HOGENOM; CLU_055003_1_3_6; -.
DR OrthoDB; 9787365at2; -.
DR PhylomeDB; Q888N5; -.
DR UniPathway; UPA00047; UER00055.
DR UniPathway; UPA00049; UER00059.
DR Proteomes; UP000002515; 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:UP000002515};
KW Transferase {ECO:0000256|RuleBase:RU368092}.
FT DOMAIN 4..78
FT /note="ACT"
FT /evidence="ECO:0000259|PROSITE:PS51671"
SQ SEQUENCE 163 AA; 17782 MW; FCCFF3CBD662CACF CRC64;
MRHIISLLLE NEPGALSRVV GLFSQRNYNI ESLTVAPTED PTLSRLTLTT VGHDEVIEQI
TKNLNKLIEV VKLVDLSESA HIERELMLVK VKATGAQRAE IKRTTDIFRG QIVDVTASVY
TVQLSGTSDK LDSFIQAIGT AAILETVRSG VTGIARGDKV LSI
//
