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Literature summary for 6.3.2.6 extracted from

  • Meyer, E.; Leonard, N.J.; Bhat, B.; Stubbe, J.; Smith, J.M.
    Purification and characterization of the purE, purK, and purC gene products: identification of a previously unrecognized energy requirement in the purine biosynthetic pathway (1992), Biochemistry, 31, 5022-5032.
    View publication on PubMed

Cloned(Commentary)

Cloned (Comment) Organism
SAICAR synthetase is cloned into a lambdaPL expression vector to give plasmid pJS408, overexpression Escherichia coli

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.036
-
Asp
-
Escherichia coli
0.04
-
MgATP2-
-
Escherichia coli
1.3
-
1-(5'-phosphoribosyl)-5-amino-4-carboxyimidazole
-
Escherichia coli

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
27000
-
3 * 27000, SDS-PAGE Escherichia coli
76000
-
ultracentrifugation Escherichia coli

Organism

Organism UniProt Comment Textmining
Escherichia coli
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Escherichia coli

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
-
Escherichia coli

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
ATP + 1-(5'-phosphoribosyl)-5-amino-4-carboxyimidazole + L-Asp
-
Escherichia coli ADP + phosphate + 1-(5'-phosphoribosyl)-5-amino-4-(N-succinocarboxamide)-imidazole
-
?
ATP + 5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxylate + L-aspartate ATP in form of MgATP2- Escherichia coli ADP + phosphate + (S)-2-[5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxamido]succinate
-
?

Subunits

Subunits Comment Organism
trimer 3 * 27000, SDS-PAGE Escherichia coli