ID E0SRB1_IGNAA Unreviewed; 579 AA.
AC E0SRB1;
DT 02-NOV-2010, integrated into UniProtKB/TrEMBL.
DT 02-NOV-2010, sequence version 1.
DT 27-MAR-2024, entry version 78.
DE RecName: Full=Acetolactate synthase {ECO:0000256|RuleBase:RU003591};
DE EC=2.2.1.6 {ECO:0000256|RuleBase:RU003591};
GN OrderedLocusNames=Igag_1563 {ECO:0000313|EMBL:ADM28365.1};
OS Ignisphaera aggregans (strain DSM 17230 / JCM 13409 / AQ1.S1).
OC Archaea; Thermoproteota; Thermoprotei; Desulfurococcales;
OC Desulfurococcaceae; Ignisphaera.
OX NCBI_TaxID=583356 {ECO:0000313|EMBL:ADM28365.1, ECO:0000313|Proteomes:UP000001304};
RN [1] {ECO:0000313|EMBL:ADM28365.1, ECO:0000313|Proteomes:UP000001304}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 17230 / JCM 13409 / AQ1.S1
RC {ECO:0000313|Proteomes:UP000001304};
RX PubMed=21304693; DOI=10.4056/sigs.1072907;
RA Goker M., Held B., Lapidus A., Nolan M., Spring S., Yasawong M., Lucas S.,
RA Glavina Del Rio T., Tice H., Cheng J.F., Goodwin L., Tapia R., Pitluck S.,
RA Liolios K., Ivanova N., Mavromatis K., Mikhailova N., Pati A., Chen A.,
RA Palaniappan K., Brambilla E., Land M., Hauser L., Chang Y.J.,
RA Jeffries C.D., Brettin T., Detter J.C., Han C., Rohde M., Sikorski J.,
RA Woyke T., Bristow J., Eisen J.A., Markowitz V., Hugenholtz P.,
RA Kyrpides N.C., Klenk H.P.;
RT "Complete genome sequence of Ignisphaera aggregans type strain (AQ1.S1).";
RL Stand. Genomic Sci. 3:66-75(2010).
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|RuleBase:RU003591};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a 2-oxocarboxylate + CoA + 2 oxidized [2Fe-2S]-[ferredoxin] =
CC an acyl-CoA + CO2 + H(+) + 2 reduced [2Fe-2S]-[ferredoxin];
CC Xref=Rhea:RHEA:42316, Rhea:RHEA-COMP:10000, Rhea:RHEA-COMP:10001,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:16526, ChEBI:CHEBI:33737,
CC ChEBI:CHEBI:33738, ChEBI:CHEBI:35179, ChEBI:CHEBI:57287,
CC ChEBI:CHEBI:58342; EC=1.2.7.11;
CC Evidence={ECO:0000256|ARBA:ARBA00000005};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|RuleBase:RU003591};
CC Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000256|RuleBase:RU003591};
CC -!- COFACTOR:
CC Name=thiamine diphosphate; Xref=ChEBI:CHEBI:58937;
CC Evidence={ECO:0000256|RuleBase:RU003591};
CC Note=Binds 1 thiamine pyrophosphate per subunit.
CC {ECO:0000256|RuleBase:RU003591};
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:RU003591}.
CC -!- PATHWAY: Amino-acid biosynthesis; L-valine biosynthesis; L-valine from
CC pyruvate: step 1/4. {ECO:0000256|ARBA:ARBA00005025,
CC ECO:0000256|RuleBase:RU003591}.
CC -!- SUBUNIT: Heterodimer composed of an alpha and a beta subunit.
CC {ECO:0000256|ARBA:ARBA00011631}.
CC -!- SIMILARITY: Belongs to the TPP enzyme family.
CC {ECO:0000256|ARBA:ARBA00007812, ECO:0000256|RuleBase:RU003591}.
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DR EMBL; CP002098; ADM28365.1; -; Genomic_DNA.
DR AlphaFoldDB; E0SRB1; -.
DR STRING; 583356.Igag_1563; -.
DR KEGG; iag:Igag_1563; -.
DR HOGENOM; CLU_013748_1_2_2; -.
DR BioCyc; IAGG583356:GHAH-1555-MONOMER; -.
DR UniPathway; UPA00047; UER00055.
DR UniPathway; UPA00049; UER00059.
DR Proteomes; UP000001304; Chromosome.
DR GO; GO:0018491; F:2-oxobutyrate synthase activity; IEA:UniProt.
DR GO; GO:0003984; F:acetolactate synthase activity; IEA:UniProtKB-EC.
DR GO; GO:0050660; F:flavin adenine dinucleotide binding; IEA:InterPro.
DR GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0019164; F:pyruvate synthase activity; IEA:UniProt.
DR GO; GO:0030976; F:thiamine pyrophosphate binding; IEA:UniProtKB-UniRule.
DR GO; GO:0009097; P:isoleucine biosynthetic process; IEA:UniProtKB-UniPathway.
DR GO; GO:0009099; P:valine biosynthetic process; IEA:UniProtKB-UniPathway.
DR CDD; cd02015; TPP_AHAS; 1.
DR CDD; cd07035; TPP_PYR_POX_like; 1.
DR Gene3D; 3.40.50.970; -; 2.
DR Gene3D; 3.40.50.1220; TPP-binding domain; 1.
DR InterPro; IPR012846; Acetolactate_synth_lsu.
DR InterPro; IPR039368; AHAS_TPP.
DR InterPro; IPR029035; DHS-like_NAD/FAD-binding_dom.
DR InterPro; IPR029061; THDP-binding.
DR InterPro; IPR012000; Thiamin_PyroP_enz_cen_dom.
DR InterPro; IPR012001; Thiamin_PyroP_enz_TPP-bd_dom.
DR InterPro; IPR000399; TPP-bd_CS.
DR InterPro; IPR045229; TPP_enz.
DR InterPro; IPR011766; TPP_enzyme_TPP-bd.
DR NCBIfam; TIGR00118; acolac_lg; 1.
DR PANTHER; PTHR18968:SF13; ACETOLACTATE SYNTHASE CATALYTIC SUBUNIT, MITOCHONDRIAL; 1.
DR PANTHER; PTHR18968; THIAMINE PYROPHOSPHATE ENZYMES; 1.
DR Pfam; PF02775; TPP_enzyme_C; 1.
DR Pfam; PF00205; TPP_enzyme_M; 1.
DR Pfam; PF02776; TPP_enzyme_N; 1.
DR SUPFAM; SSF52467; DHS-like NAD/FAD-binding domain; 1.
DR SUPFAM; SSF52518; Thiamin diphosphate-binding fold (THDP-binding); 2.
DR PROSITE; PS00187; TPP_ENZYMES; 1.
PE 3: Inferred from homology;
KW Amino-acid biosynthesis {ECO:0000256|ARBA:ARBA00022605,
KW ECO:0000256|RuleBase:RU003591};
KW Branched-chain amino acid biosynthesis {ECO:0000256|ARBA:ARBA00023304,
KW ECO:0000256|RuleBase:RU003591}; Magnesium {ECO:0000256|RuleBase:RU003591};
KW Metal-binding {ECO:0000256|RuleBase:RU003591};
KW Reference proteome {ECO:0000313|Proteomes:UP000001304};
KW Thiamine pyrophosphate {ECO:0000256|RuleBase:RU003591};
KW Transferase {ECO:0000256|RuleBase:RU003591}.
FT DOMAIN 3..120
FT /note="Thiamine pyrophosphate enzyme N-terminal TPP-
FT binding"
FT /evidence="ECO:0000259|Pfam:PF02776"
FT DOMAIN 199..338
FT /note="Thiamine pyrophosphate enzyme central"
FT /evidence="ECO:0000259|Pfam:PF00205"
FT DOMAIN 399..546
FT /note="Thiamine pyrophosphate enzyme TPP-binding"
FT /evidence="ECO:0000259|Pfam:PF02775"
SQ SEQUENCE 579 AA; 63618 MW; 82ADD9F739EE6D66 CRC64;
MISGAKLTAE AIKRAGIKVI FGIPGLSNMA LYDALVEYVQ QNDIRLILMR HEQGAAHAAD
GYARASGAPG VCTTTSGPGA MNLVTGLITA YWDNSPVIAI TGQVPRNAMG KLAFQEADVV
GVMENITKYV LLVKNASEIP LALKNAIYIA TTGRPGPVVI DIPRDLFNEK LDESSIVWPE
KPFVKGYREF PYRVDPLELK KAVKLLINAE KPLMLVGAGA VWSMATDEIL KLAELLQMPI
VSTLLGKAAV PHNYPLYLGM MGYYGRAEAN MAFLESDVVL VVGARLSDRT ITSYKDVKDT
KKKIIMINID PTDIEKQKQY IDIEAGLIGD AKKVLRELIN AILEIGTKFG RSAWLRRVQE
YREYYSSLYY VDGDKYLAPW KVMKTIREVL PSNAIITTGV GQHQMWAGVF WEVLEPRTFI
TSGGMGTMGF GLPAAIGAKA ALPNRVVVDL DGDGSFLMTM NNLGTAVDEN LPIIVAIFDN
RTLGLVRQVQ DLFFNGRIIS VDFGSATDYV KLAEGFGALG FDVQSYEDIE IAFRRAMKEN
IATVIRIPIN REALSLPTLP PGGSLREMIL HDPRKRSHS
//
