EC Number |
Reaction |
Reference |
---|
3.2.2.23 | DNA containing ring-opened N7-methylguanine + H2O = deguanylated DNA + 2,6-diamino-4-hydroxy-5-(N-methyl)formamidopyrimidine |
catalytic mechanism |
-, 646932, 646933, 646940, 646952, 646954 |
3.2.2.23 | DNA containing ring-opened N7-methylguanine + H2O = deguanylated DNA + 2,6-diamino-4-hydroxy-5-(N-methyl)formamidopyrimidine |
chemical reaction mechanism, overview. For the catalysis to occur, the damaged base must be extruded from the DNA helix and placed in the active site of enzyme, this is achieved in Fpg by kinking DNA at the lesion point. The reaction mechanism involves coupled conformational changes in the enzyme and DNA, which proceed sequentially and assemble the catalytic groups in the active site |
710030 |
3.2.2.23 | DNA containing ring-opened N7-methylguanine + H2O = deguanylated DNA + 2,6-diamino-4-hydroxy-5-(N-methyl)formamidopyrimidine |
formation of the transition state complex from the reactants exhibits an overall free energy of 9.6 kcal/mol |
682591 |
3.2.2.23 | DNA containing ring-opened N7-methylguanine + H2O = deguanylated DNA + 2,6-diamino-4-hydroxy-5-(N-methyl)formamidopyrimidine |
kinetic mechanism |
646952 |
3.2.2.23 | DNA containing ring-opened N7-methylguanine + H2O = deguanylated DNA + 2,6-diamino-4-hydroxy-5-(N-methyl)formamidopyrimidine |
mechanism |
-, 646938, 646948, 646950, 646951 |
3.2.2.23 | DNA containing ring-opened N7-methylguanine + H2O = deguanylated DNA + 2,6-diamino-4-hydroxy-5-(N-methyl)formamidopyrimidine |
reaction mechanism |
646953 |
3.2.2.23 | DNA containing ring-opened N7-methylguanine + H2O = deguanylated DNA + 2,6-diamino-4-hydroxy-5-(N-methyl)formamidopyrimidine |
several fast sequential conformational changes occur in enzyme after binding to its substrate, converting the protein into a catalytically active conformation |
670426 |
3.2.2.23 | DNA containing ring-opened N7-methylguanine + H2O = deguanylated DNA + 2,6-diamino-4-hydroxy-5-(N-methyl)formamidopyrimidine |
the damaged base is first destabilized by the enzyme binding and then everted from DNA, followed by insertion of several amino acid residues into DNA and isomerization of the enzyme into a pre-excision complex |
678270 |