ID A0A2U8E6M2_9BACT Unreviewed; 97 AA.
AC A0A2U8E6M2;
DT 12-SEP-2018, integrated into UniProtKB/TrEMBL.
DT 12-SEP-2018, sequence version 1.
DT 27-MAR-2024, entry version 21.
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:AWI10182.1};
GN ORFNames=CKA38_13765 {ECO:0000313|EMBL:AWI10182.1};
OS Ereboglobus luteus.
OC Bacteria; Verrucomicrobiota; Opitutae; Opitutales; Opitutaceae;
OC Ereboglobus.
OX NCBI_TaxID=1796921 {ECO:0000313|EMBL:AWI10182.1, ECO:0000313|Proteomes:UP000244896};
RN [1] {ECO:0000313|EMBL:AWI10182.1, ECO:0000313|Proteomes:UP000244896}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Ho45 {ECO:0000313|EMBL:AWI10182.1,
RC ECO:0000313|Proteomes:UP000244896};
RX PubMed=29295750; DOI=10.1016/j.syapm.2017.10.005;
RA Tegtmeier D., Belitz A., Radek R., Heimerl T., Brune A.;
RT "Ereboglobus luteus gen. nov. sp. nov. from cockroach guts, and new
RT insights into the oxygen relationship of the genera Opitutus and
RT Didymococcus (Verrucomicrobia: Opitutaceae).";
RL Syst. Appl. Microbiol. 41:101-112(2018).
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; CP023004; AWI10182.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A2U8E6M2; -.
DR OrthoDB; 9787365at2; -.
DR UniPathway; UPA00047; UER00055.
DR UniPathway; UPA00049; UER00059.
DR Proteomes; UP000244896; 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 InterPro; IPR004789; Acetalactate_synth_ssu.
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:SF4; ACETOLACTATE SYNTHASE ISOZYME 1 SMALL SUBUNIT; 1.
DR PANTHER; PTHR30239; ACETOLACTATE SYNTHASE SMALL SUBUNIT; 1.
DR Pfam; PF01842; ACT; 1.
DR SUPFAM; SSF55021; ACT-like; 1.
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:UP000244896};
KW Transferase {ECO:0000256|RuleBase:RU368092}.
FT DOMAIN 11..84
FT /note="ACT"
FT /evidence="ECO:0000259|PROSITE:PS51671"
SQ SEQUENCE 97 AA; 10987 MW; E95D49B68689C67C CRC64;
MNASTIAQTH IIDLRVRNHP GVMSHITGLF ARRAFNLEAI LCVPVSGNDE SRMLLLVNDT
PKLEQIERQL AKLHDVLAVR QRTDLPPDYF ERLGKSI
//
