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IPR020629 is a Formamidopyrimidine-DNA glycosylase.
<p>Formamidopyrimidine-DNA glycosylase (Fpg, MutM) is a trifunctional DNA base excision repair enzyme that removes a wide range of oxidation-damaged bases (N-glycosylase activity; [ec:3.2.2.23]) and cleaves both the 3'- and 5'-phosphodiester bonds of the resulting apurinic/apyrimidinic site (AP lyase activity; [ec:4.2.99.18]). Fpg has a preference for oxidised purines, excising oxidized purine bases such as 7,8-dihydro-8-oxoguanine (8-oxoG). ITs AP (apurinic/apyrimidinic) lyase activity introduces nicks in the DNA strand, cleaving the DNA backbone by beta-delta elimination to generate a single-strand break at the site of the removed base with both 3'- and 5'-phosphates. Fpg is a monomer composed of 2 domains connected by a flexible hinge [[cite:PUB00014010]]. The two DNA-binding motifs (a zinc finger and the helix-two-turns-helix motifs) suggest that the oxidized base is flipped out from double-stranded DNA in the binding mode and excised by a catalytic mechanism similar to that of bifunctional base excision repair enzymes [[cite:PUB00014010]]. Fpg binds one ion of zinc at the C terminus, which contains four conserved and essential cysteines [[cite:PUB00002832], [cite:PUB00003593]].</p>
This description is obtained from EB-eye REST.
GO predictions are based solely on the InterPro-to-GO mappings published by EMBL-EBI, which are in turn based on the mapping of predicted domains to the InterPro dataset. The InterPro-to-GO mapping was last updated on , while the GO metadata was last updated on .
| GO term | Namespace | Name | Definition | Relationships |
|---|---|---|---|---|
| Molecular function | DNA-(apurinic or apyrimidinic site) endonuclease activity | Catalysis of the cleavage of the C-O-P bond in the AP site created when DNA glycosylase removes a damaged base, involved in the DNA base excision repair pathway (BER). | ||
| Biological process | DNA repair | The process of restoring DNA after damage. Genomes are subject to damage by chemical and physical agents in the environment (e.g. UV and ionizing radiations, chemical mutagens, fungal and bacterial toxins, etc.) and by free radicals or alkylating agents endogenously generated in metabolism. DNA is also damaged because of errors during its replication. A variety of different DNA repair pathways have been reported that include direct reversal, base excision repair, nucleotide excision repair, photoreactivation, bypass, double-strand break repair pathway, and mismatch repair pathway. | ||
| Molecular function | Zinc ion binding | Interacting selectively and non-covalently with zinc (Zn) ions. | ||
| Molecular function | Oxidized purine nucleobase lesion DNA N-glycosylase activity | Catalysis of the removal of oxidized purine bases by cleaving the N-C1' glycosidic bond between the oxidized purine and the deoxyribose sugar. The reaction involves the formation of a covalent enzyme-substrate intermediate. Release of the enzyme and free base by a beta-elimination or a beta, gamma-elimination mechanism results in the cleavage of the DNA backbone 3' of the apurinic (AP) site. |
| Transcript | Name | Description | Predicted domains | Domain count |
|---|---|---|---|---|
| – | PREDICTED: formamidopyrimidine-DNA glycosylase-like isoform X2 [Cicer arietinum] gi|502080701|ref|XP_004486650.1| | 18 | ||
| – | PREDICTED: formamidopyrimidine-DNA glycosylase-like isoform X1 [Cicer arietinum] gi|502080698|ref|XP_004486649.1| | 18 | ||
| – | Formamidopyrimidine-DNA glycosylase; TAIR: AT1G52500.2 MUTM homolog-1; Swiss-Prot: sp|O80358|FPG_ARATH Formamidopyrimidine-DNA glycosylase; TrEMBL-Plants: tr|A0A151SPP2|A0A151SPP2_CAJCA Formamidopyrimidine-DNA glycosylase; Found in the gene: LotjaGi3g1v0007500 | 19 | ||
| – | Formamidopyrimidine-DNA glycosylase; TAIR: AT1G52500.2 MUTM homolog-1; Swiss-Prot: sp|O80358|FPG_ARATH Formamidopyrimidine-DNA glycosylase; TrEMBL-Plants: tr|G7II90|G7II90_MEDTR Formamidopyrimidine-DNA glycosylase; Found in the gene: LotjaGi3g1v0007500 | 19 | ||
| – | Formamidopyrimidine-DNA glycosylase; TAIR: AT1G52500.1 MUTM homolog-1; Swiss-Prot: sp|O80358|FPG_ARATH Formamidopyrimidine-DNA glycosylase; TrEMBL-Plants: tr|A0A151SPP2|A0A151SPP2_CAJCA Formamidopyrimidine-DNA glycosylase; Found in the gene: LotjaGi3g1v0007500 | 18 |
A list of co-occurring predicted domains within the L. japonicus gene space:
| Predicted domain | Source | Observations | Saturation (%) |
|---|---|---|---|
| cd08972 | CDD | 1 | 20.00 |