DNA-formamidopyrimidine glycosylase

DNA-formamidopyrimidine glycosylase (EC 3.2.2.23, Fapy-DNA glycosylase, deoxyribonucleate glycosidase, 2,6-diamino-4-hydroxy-5N-formamidopyrimidine-DNA glycosylase, 2,6-diamino-4-hydroxy-5(N-methyl)formamidopyrimidine-DNA glycosylase, formamidopyrimidine-DNA glycosylase, DNA-formamidopyrimidine glycosidase, Fpg protein) is an enzyme with systematic name DNA glycohydrolase (2,6-diamino-4-hydroxy-5-(N-methyl)formamidopyrimide releasing).[1] FPG is a base excision repair enzyme which recognizes and removes a wide range of oxidized purines from correspondingly damaged DNA.[2] It was discovered by Zimbabwean scientist Christopher J. Chetsanga in 1975.[3]

DNA-formamidopyrimidine glycosylase
Identifiers
EC number3.2.2.23
CAS number78783-53-6
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum

This enzyme catalyses the following chemical reaction

Hydrolysis of DNA containing ring-opened 7-methylguanine residues, releasing 2,6-diamino-4-hydroxy-5-(N-methyl)formamidopyrimidine

This enzyme participates in processes leading to recovery from mutagenesis and/or cell death by alkylating agents.

References
  1. Boiteux S, O'Connor TR, Laval J (October 1987). "Formamidopyrimidine-DNA glycosylase of Escherichia coli: cloning and sequencing of the fpg structural gene and overproduction of the protein". The EMBO Journal. 6 (10): 3177–83. PMC 553760. PMID 3319582.
  2. Serre1; Pereira De Jésus, K; Boiteux, S; Zelwer, C; Castaing, B; et al. (2002). "Crystal structure of the Lactococcus lactis formamidopyrimidine-DNA glycosylase bound to an abasic site analogue-containing DNA". The EMBO Journal. 21 (12): 2854–2865. doi:10.1093/emboj/cdf304. PMC 126059. PMID 12065399.
  3. Chetsanga C.J., Lindahl T. (1979). "Release of 7-methylguanine residues whose imidazole rings have been opened from damaged DNA by a DNA glycosylase from Escherichia coli". Nucleic Acids Res. 6 (11): 3673–84. doi:10.1093/nar/6.11.3673. PMC 327965. PMID 386277.
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