ID D8FV81_9CYAN Unreviewed; 551 AA.
AC D8FV81;
DT 05-OCT-2010, integrated into UniProtKB/TrEMBL.
DT 05-OCT-2010, sequence version 1.
DT 27-MAR-2024, entry version 67.
DE RecName: Full=2-isopropylmalate synthase {ECO:0000256|ARBA:ARBA00018198, ECO:0000256|HAMAP-Rule:MF_01025};
DE EC=2.3.3.13 {ECO:0000256|ARBA:ARBA00012973, ECO:0000256|HAMAP-Rule:MF_01025};
DE AltName: Full=Alpha-IPM synthase {ECO:0000256|HAMAP-Rule:MF_01025};
DE AltName: Full=Alpha-isopropylmalate synthase {ECO:0000256|HAMAP-Rule:MF_01025};
GN Name=leuA {ECO:0000256|HAMAP-Rule:MF_01025,
GN ECO:0000313|EMBL:CBN54271.1};
GN ORFNames=OSCI_760006 {ECO:0000313|EMBL:CBN54271.1};
OS Kamptonema sp. PCC 6506.
OC Bacteria; Cyanobacteriota; Cyanophyceae; Oscillatoriophycideae;
OC Oscillatoriales; Microcoleaceae; Kamptonema.
OX NCBI_TaxID=272129 {ECO:0000313|EMBL:CBN54271.1, ECO:0000313|Proteomes:UP000004532};
RN [1] {ECO:0000313|Proteomes:UP000004532}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PCC 6506 {ECO:0000313|Proteomes:UP000004532};
RX PubMed=20675499; DOI=10.1128/JB.00704-10;
RA Mejean A., Mazmouz R., Mann S., Calteau A., Medigue C., Ploux O.;
RT "The genome sequence of the cyanobacterium Oscillatoria sp. PCC 6506
RT reveals several gene clusters responsible for the biosynthesis of toxins
RT and secondary metabolites.";
RL J. Bacteriol. 192:5264-5265(2010).
CC -!- FUNCTION: Catalyzes the condensation of the acetyl group of acetyl-CoA
CC with 3-methyl-2-oxobutanoate (2-ketoisovalerate) to form 3-carboxy-3-
CC hydroxy-4-methylpentanoate (2-isopropylmalate). {ECO:0000256|HAMAP-
CC Rule:MF_01025}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=3-methyl-2-oxobutanoate + acetyl-CoA + H2O = (2S)-2-
CC isopropylmalate + CoA + H(+); Xref=Rhea:RHEA:21524, ChEBI:CHEBI:1178,
CC ChEBI:CHEBI:11851, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:57287, ChEBI:CHEBI:57288; EC=2.3.3.13;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01025};
CC -!- COFACTOR:
CC Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01025};
CC -!- PATHWAY: Amino-acid biosynthesis; L-leucine biosynthesis; L-leucine
CC from 3-methyl-2-oxobutanoate: step 1/4. {ECO:0000256|ARBA:ARBA00004689,
CC ECO:0000256|HAMAP-Rule:MF_01025}.
CC -!- SUBUNIT: Homodimer. {ECO:0000256|HAMAP-Rule:MF_01025}.
CC -!- SIMILARITY: Belongs to the alpha-IPM synthase/homocitrate synthase
CC family. LeuA type 1 subfamily. {ECO:0000256|ARBA:ARBA00009396,
CC ECO:0000256|HAMAP-Rule:MF_01025}.
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DR EMBL; CACA01000073; CBN54271.1; -; Genomic_DNA.
DR RefSeq; WP_007353498.1; NZ_CACA01000073.1.
DR AlphaFoldDB; D8FV81; -.
DR OrthoDB; 9804858at2; -.
DR UniPathway; UPA00048; UER00070.
DR Proteomes; UP000004532; Unassembled WGS sequence.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-UniRule.
DR GO; GO:0003852; F:2-isopropylmalate synthase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0003985; F:acetyl-CoA C-acetyltransferase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0030145; F:manganese ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0009098; P:leucine biosynthetic process; IEA:UniProtKB-UniRule.
DR CDD; cd07940; DRE_TIM_IPMS; 1.
DR Gene3D; 1.10.238.260; -; 1.
DR Gene3D; 3.30.160.270; -; 1.
DR Gene3D; 3.20.20.70; Aldolase class I; 1.
DR HAMAP; MF_01025; LeuA_type1; 1.
DR InterPro; IPR013709; 2-isopropylmalate_synth_dimer.
DR InterPro; IPR002034; AIPM/Hcit_synth_CS.
DR InterPro; IPR013785; Aldolase_TIM.
DR InterPro; IPR036230; LeuA_allosteric_dom_sf.
DR InterPro; IPR005671; LeuA_bact_synth.
DR InterPro; IPR000891; PYR_CT.
DR NCBIfam; TIGR00973; leuA_bact; 1.
DR PANTHER; PTHR10277:SF9; 2-ISOPROPYLMALATE SYNTHASE 1, CHLOROPLASTIC-RELATED; 1.
DR PANTHER; PTHR10277; HOMOCITRATE SYNTHASE-RELATED; 1.
DR Pfam; PF00682; HMGL-like; 1.
DR Pfam; PF08502; LeuA_dimer; 1.
DR SMART; SM00917; LeuA_dimer; 1.
DR SUPFAM; SSF110921; 2-isopropylmalate synthase LeuA, allosteric (dimerisation) domain; 1.
DR SUPFAM; SSF51569; Aldolase; 1.
DR PROSITE; PS00815; AIPM_HOMOCIT_SYNTH_1; 1.
DR PROSITE; PS00816; AIPM_HOMOCIT_SYNTH_2; 1.
DR PROSITE; PS50991; PYR_CT; 1.
PE 3: Inferred from homology;
KW Acyltransferase {ECO:0000313|EMBL:CBN54271.1};
KW Amino-acid biosynthesis {ECO:0000256|ARBA:ARBA00022605, ECO:0000256|HAMAP-
KW Rule:MF_01025};
KW Branched-chain amino acid biosynthesis {ECO:0000256|ARBA:ARBA00023304,
KW ECO:0000256|HAMAP-Rule:MF_01025};
KW Cytoplasm {ECO:0000256|ARBA:ARBA00022490, ECO:0000256|HAMAP-Rule:MF_01025};
KW Leucine biosynthesis {ECO:0000256|ARBA:ARBA00022430, ECO:0000256|HAMAP-
KW Rule:MF_01025};
KW Manganese {ECO:0000256|ARBA:ARBA00023211, ECO:0000256|HAMAP-Rule:MF_01025};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP-
KW Rule:MF_01025}; Reference proteome {ECO:0000313|Proteomes:UP000004532};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_01025}.
FT DOMAIN 10..277
FT /note="Pyruvate carboxyltransferase"
FT /evidence="ECO:0000259|PROSITE:PS50991"
FT REGION 410..551
FT /note="Regulatory domain"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01025"
FT BINDING 19
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01025"
FT BINDING 210
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01025"
FT BINDING 212
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01025"
FT BINDING 246
FT /ligand="Mn(2+)"
FT /ligand_id="ChEBI:CHEBI:29035"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01025"
SQ SEQUENCE 551 AA; 59944 MW; D6273437041AC31E CRC64;
MKNQSKQDRI IIFDTTLRDG EQSPGAALNV DEKLTIARQL ARLGVDVIEA GFPYASPGDF
EAVQKIAQTV GVEGGPTICG LARASKNDIE AAAKALEPAA NRRIHTFLAT SDIHLEYKLK
KTRAEVLAIV PEMVAHAKSF VEDVEFSPED AGRSDPEFLY QVLERAIAAG ATTVNIPDTV
GYTTPAEFGA LIRGIKENVP NIDQAIISVH GHNDLGLAVA NFLEAVKNGA RQLECTINGI
GERAGNAALE ELVMALHVRR QYFNPFLGRP VDSEESLTNI DTRQIYKTSR LVSTLTGMLV
QPNKAIVGAN AFAHESGIHQ DGVLKNKLTY EIMDATSIGL TDNQIVLGKL SGRHAFQSRL
KELGFELSDD ELNKAFVKFK DLADKKKEIT DWDLEAIAND EIHQPPELFR VELVQVSCGD
RARPTATVTL RTPTGEELTD AAIGTGPVDA VYRAINRVVN VPNELIEFSV QSVTAGIDAI
GEVTIRLRHE GKVFSGHAAN TDIIVASAQA YVSALNRLYA SLNPGFETSN QNLMRLMDDI
GEKAQVREMT P
//
