endonuclease VIII [Escherichia coli str. K-12 substr. MG1655]
Protein Classification
endonuclease VIII( domain architecture ID 11484730)
endonuclease VIII is a DNA-(apurinic or apyrimidinic site) lyase involved in base excision repair of DNA damaged by oxidation or by mutagenic agents; acts as DNA glycosylase that recognizes and removes damaged bases with a preference for oxidized pyrimidines
List of domain hits
| Name | Accession | Description | Interval | E-value | |||||
| PRK10445 | PRK10445 | endonuclease VIII; Provisional |
1-263 | 0e+00 | |||||
endonuclease VIII; Provisional : Pssm-ID: 182467 [Multi-domain] Cd Length: 263 Bit Score: 564.65 E-value: 0e+00
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| Name | Accession | Description | Interval | E-value | |||||
| PRK10445 | PRK10445 | endonuclease VIII; Provisional |
1-263 | 0e+00 | |||||
endonuclease VIII; Provisional Pssm-ID: 182467 [Multi-domain] Cd Length: 263 Bit Score: 564.65 E-value: 0e+00
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| Nei | COG0266 | Formamidopyrimidine-DNA glycosylase [Replication, recombination and repair]; |
2-263 | 3.61e-90 | |||||
Formamidopyrimidine-DNA glycosylase [Replication, recombination and repair]; Pssm-ID: 440036 [Multi-domain] Cd Length: 272 Bit Score: 267.76 E-value: 3.61e-90
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| EcNei-like_N | cd08965 | N-terminal domain of Escherichia coli Nei/endonuclease VIII and related DNA glycosylases; This ... |
2-116 | 3.55e-76 | |||||
N-terminal domain of Escherichia coli Nei/endonuclease VIII and related DNA glycosylases; This family contains the N-terminal domain of proteobacteria Nei and related DNA glycosylases. It includes Escherichia coli Nei, and belongs to the FpgNei_N, [N-terminal domain of Fpg (formamidopyrimidine-DNA glycosylase, MutM)_Nei (endonuclease VIII)] domain superfamily. DNA glycosylases maintain genome integrity by recognizing base lesions created by ionizing radiation, alkylating or oxidizing agents, and endogenous reactive oxygen species. They initiate the base-excision repair process, which is completed with the help of enzymes such as phosphodiesterases, AP endonucleases, DNA polymerases and DNA ligases. DNA glycosylases cleave the N-glycosyl bond between the sugar and the damaged base, creating an AP (apurinic/apyrimidinic) site. Most FpgNei DNA glycosylases use their N-terminal proline residue as the key catalytic nucleophile, and the reaction proceeds via a Schiff base intermediate. Escherichia coli Nei has been well studied, it is a DNA glycosylase/AP lyase that excises damaged pyrimidines, including 5-hydroxycytosine, 5-hydroxyuracil, and uracil glycol. In addition to this EcNei-like_N domain, enzymes belonging to this family contain a helix-two turn-helix (H2TH) domain and a canonical zinc-finger motif. Pssm-ID: 176799 Cd Length: 115 Bit Score: 226.47 E-value: 3.55e-76
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| fpg | TIGR00577 | DNA-formamidopyrimidine glycosylase; All proteins in the FPG family with known functions are ... |
2-262 | 1.10e-27 | |||||
DNA-formamidopyrimidine glycosylase; All proteins in the FPG family with known functions are FAPY-DNA glycosylases that function in base excision repair. Homologous to endonuclease VIII (nei). This family is based on the phylogenomic analysis of JA Eisen (1999, Ph.D. Thesis, Stanford University). [DNA metabolism, DNA replication, recombination, and repair] Pssm-ID: 273150 [Multi-domain] Cd Length: 272 Bit Score: 107.00 E-value: 1.10e-27
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| Fapy_DNA_glyco | smart00898 | Formamidopyrimidine-DNA glycosylase N-terminal domain; This entry represents the catalytic ... |
2-104 | 7.01e-21 | |||||
Formamidopyrimidine-DNA glycosylase N-terminal domain; This entry represents the catalytic domain of DNA glycosylase/AP lyase enzymes, which are involved in base excision repair of DNA damaged by oxidation or by mutagenic agents. Most damage to bases in DNA is repaired by the base excision repair pathway. These enzymes are primarily from bacteria, and have both DNA glycosylase activity and AP lyase activity. Examples include formamidopyrimidine-DNA glycosylases (Fpg; MutM) and endonuclease VIII (Nei). Formamidopyrimidine-DNA glycosylases (Fpg, MutM) is a trifunctional DNA base excision repair enzyme that removes a wide range of oxidation-damaged bases (N-glycosylase activity; ) and cleaves both the 3'- and 5'-phosphodiester bonds of the resulting apurinic/apyrimidinic site (AP lyase activity; ). 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. 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. Fpg binds one ion of zinc at the C-terminus, which contains four conserved and essential cysteines.. Endonuclease VIII (Nei) has the same enzyme activities as Fpg above, but with a preference for oxidized pyrimidines, such as thymine glycol, 5,6-dihydrouracil and 5,6-dihydrothymine. These protein contains three structural domains: an N-terminal catalytic core domain, a central helix-two turn-helix (H2TH) module and a C-terminal zinc finger (see PDB:1K82). The N-terminal catalytic domain and the C-terminal zinc finger straddle the DNA with the long axis of the protein oriented roughly orthogonal to the helical axis of the DNA. Residues that contact DNA are located in the catalytic domain and in a beta-hairpin loop formed by the zinc finger. Pssm-ID: 214895 [Multi-domain] Cd Length: 115 Bit Score: 84.93 E-value: 7.01e-21
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| Fapy_DNA_glyco | pfam01149 | Formamidopyrimidine-DNA glycosylase N-terminal domain; Formamidopyrimidine-DNA glycosylase ... |
1-104 | 2.23e-14 | |||||
Formamidopyrimidine-DNA glycosylase N-terminal domain; Formamidopyrimidine-DNA glycosylase (Fpg) is a DNA repair enzyme that excises oxidized purines from damaged DNA. This family is the N-terminal domain contains eight beta-strands, forming a beta-sandwich with two alpha-helices parallel to its edges. Pssm-ID: 460082 Cd Length: 116 Bit Score: 67.53 E-value: 2.23e-14
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| Name | Accession | Description | Interval | E-value | |||||
| PRK10445 | PRK10445 | endonuclease VIII; Provisional |
1-263 | 0e+00 | |||||
endonuclease VIII; Provisional Pssm-ID: 182467 [Multi-domain] Cd Length: 263 Bit Score: 564.65 E-value: 0e+00
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| Nei | COG0266 | Formamidopyrimidine-DNA glycosylase [Replication, recombination and repair]; |
2-263 | 3.61e-90 | |||||
Formamidopyrimidine-DNA glycosylase [Replication, recombination and repair]; Pssm-ID: 440036 [Multi-domain] Cd Length: 272 Bit Score: 267.76 E-value: 3.61e-90
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| EcNei-like_N | cd08965 | N-terminal domain of Escherichia coli Nei/endonuclease VIII and related DNA glycosylases; This ... |
2-116 | 3.55e-76 | |||||
N-terminal domain of Escherichia coli Nei/endonuclease VIII and related DNA glycosylases; This family contains the N-terminal domain of proteobacteria Nei and related DNA glycosylases. It includes Escherichia coli Nei, and belongs to the FpgNei_N, [N-terminal domain of Fpg (formamidopyrimidine-DNA glycosylase, MutM)_Nei (endonuclease VIII)] domain superfamily. DNA glycosylases maintain genome integrity by recognizing base lesions created by ionizing radiation, alkylating or oxidizing agents, and endogenous reactive oxygen species. They initiate the base-excision repair process, which is completed with the help of enzymes such as phosphodiesterases, AP endonucleases, DNA polymerases and DNA ligases. DNA glycosylases cleave the N-glycosyl bond between the sugar and the damaged base, creating an AP (apurinic/apyrimidinic) site. Most FpgNei DNA glycosylases use their N-terminal proline residue as the key catalytic nucleophile, and the reaction proceeds via a Schiff base intermediate. Escherichia coli Nei has been well studied, it is a DNA glycosylase/AP lyase that excises damaged pyrimidines, including 5-hydroxycytosine, 5-hydroxyuracil, and uracil glycol. In addition to this EcNei-like_N domain, enzymes belonging to this family contain a helix-two turn-helix (H2TH) domain and a canonical zinc-finger motif. Pssm-ID: 176799 Cd Length: 115 Bit Score: 226.47 E-value: 3.55e-76
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| PRK01103 | PRK01103 | bifunctional DNA-formamidopyrimidine glycosylase/DNA-(apurinic or apyrimidinic site) lyase; |
1-263 | 2.82e-33 | |||||
bifunctional DNA-formamidopyrimidine glycosylase/DNA-(apurinic or apyrimidinic site) lyase; Pssm-ID: 234899 [Multi-domain] Cd Length: 274 Bit Score: 121.73 E-value: 2.82e-33
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| fpg | TIGR00577 | DNA-formamidopyrimidine glycosylase; All proteins in the FPG family with known functions are ... |
2-262 | 1.10e-27 | |||||
DNA-formamidopyrimidine glycosylase; All proteins in the FPG family with known functions are FAPY-DNA glycosylases that function in base excision repair. Homologous to endonuclease VIII (nei). This family is based on the phylogenomic analysis of JA Eisen (1999, Ph.D. Thesis, Stanford University). [DNA metabolism, DNA replication, recombination, and repair] Pssm-ID: 273150 [Multi-domain] Cd Length: 272 Bit Score: 107.00 E-value: 1.10e-27
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| FpgNei_N | cd08773 | N-terminal domain of Fpg (formamidopyrimidine-DNA glycosylase, MutM)_Nei (endonuclease VIII) ... |
2-105 | 2.37e-26 | |||||
N-terminal domain of Fpg (formamidopyrimidine-DNA glycosylase, MutM)_Nei (endonuclease VIII) base-excision repair DNA glycosylases; DNA glycosylases maintain genome integrity by recognizing base lesions created by ionizing radiation, alkylating or oxidizing agents, and endogenous reactive oxygen species. These enzymes initiate the base-excision repair process, which is completed with the help of enzymes such as phosphodiesterases, AP endonucleases, DNA polymerases and DNA ligases. DNA glycolsylases cleave the N-glycosyl bond between the sugar and the damaged base, creating an AP (apurinic/apyrimidinic) site. The FpgNei DNA glycosylases represent one of the two structural superfamilies of DNA glycosylases that recognize oxidized bases (the other is the HTH-GPD superfamily exemplified by Escherichia coli Nth). Most FpgNei DNA glycosylases use their N-terminal proline residue as the key catalytic nucleophile, and the reaction proceeds via a Schiff base intermediate. One exception is mouse Nei-like glycosylase 3 (Neil3) which forms a Schiff base intermediate via its N-terminal valine. In addition to this FpgNei_N domain, FpgNei proteins have a helix-two-turn-helix (H2TH) domain and a zinc (or zincless)-finger motif which also contribute residues to the active site. FpgNei DNA glycosylases have a broad substrate specificity. They are bifunctional, in addition to the glycosylase (recognition) activity, they have a lyase (cleaving) activity on the phosphodiester backbone of the DNA at the AP site. This superfamily includes eukaryotic, bacterial, and viral proteins. Pssm-ID: 176798 Cd Length: 117 Bit Score: 99.36 E-value: 2.37e-26
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| Fapy_DNA_glyco | smart00898 | Formamidopyrimidine-DNA glycosylase N-terminal domain; This entry represents the catalytic ... |
2-104 | 7.01e-21 | |||||
Formamidopyrimidine-DNA glycosylase N-terminal domain; This entry represents the catalytic domain of DNA glycosylase/AP lyase enzymes, which are involved in base excision repair of DNA damaged by oxidation or by mutagenic agents. Most damage to bases in DNA is repaired by the base excision repair pathway. These enzymes are primarily from bacteria, and have both DNA glycosylase activity and AP lyase activity. Examples include formamidopyrimidine-DNA glycosylases (Fpg; MutM) and endonuclease VIII (Nei). Formamidopyrimidine-DNA glycosylases (Fpg, MutM) is a trifunctional DNA base excision repair enzyme that removes a wide range of oxidation-damaged bases (N-glycosylase activity; ) and cleaves both the 3'- and 5'-phosphodiester bonds of the resulting apurinic/apyrimidinic site (AP lyase activity; ). 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. 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. Fpg binds one ion of zinc at the C-terminus, which contains four conserved and essential cysteines.. Endonuclease VIII (Nei) has the same enzyme activities as Fpg above, but with a preference for oxidized pyrimidines, such as thymine glycol, 5,6-dihydrouracil and 5,6-dihydrothymine. These protein contains three structural domains: an N-terminal catalytic core domain, a central helix-two turn-helix (H2TH) module and a C-terminal zinc finger (see PDB:1K82). The N-terminal catalytic domain and the C-terminal zinc finger straddle the DNA with the long axis of the protein oriented roughly orthogonal to the helical axis of the DNA. Residues that contact DNA are located in the catalytic domain and in a beta-hairpin loop formed by the zinc finger. Pssm-ID: 214895 [Multi-domain] Cd Length: 115 Bit Score: 84.93 E-value: 7.01e-21
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| PRK14811 | PRK14811 | formamidopyrimidine-DNA glycosylase; Provisional |
1-262 | 5.28e-19 | |||||
formamidopyrimidine-DNA glycosylase; Provisional Pssm-ID: 184831 [Multi-domain] Cd Length: 269 Bit Score: 83.69 E-value: 5.28e-19
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| AcNei2_N | cd08971 | N-terminal domain of the actinomycetal Nei2 and related DNA glycosylases; This family contains ... |
1-115 | 2.08e-18 | |||||
N-terminal domain of the actinomycetal Nei2 and related DNA glycosylases; This family contains the N-terminal domain of the actinomycetal Nei2 and related DNA glycosylases. It belongs to the FpgNei_N, [N-terminal domain of Fpg (formamidopyrimidine-DNA glycosylase, MutM)_Nei (endonuclease VIII)] domain superfamily. DNA glycosylases maintain genome integrity by recognizing base lesions created by ionizing radiation, alkylating or oxidizing agents, and endogenous reactive oxygen species. They initiate the base-excision repair process, which is completed with the help of enzymes such as phosphodiesterases, AP endonucleases, DNA polymerases and DNA ligases. DNA glycosylases cleave the N-glycosyl bond between the sugar and the damaged base, creating an AP (apurinic/apyrimidinic) site. Most FpgNei DNA glycosylases use their N-terminal proline residue as the key catalytic nucleophile, and the reaction proceeds via a Schiff base intermediate. This family contains mostly actinomycetes and includes Mycobacterium tuberculosis Nei2 (MtuNei2). Complementation experiments in repair-deficient Escherichia coli (fpg mutY nei triple and nei nth double mutants), support that MtuNei2 is functionally active in vivo and recognizes both guanine and cytosine oxidation products. In addition to this AcNei2_N domain, enzymes belonging to this family contain a helix-two turn-helix (H2TH) domain and a zinc-finger motif. Pssm-ID: 176805 Cd Length: 114 Bit Score: 78.40 E-value: 2.08e-18
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| PRK13945 | PRK13945 | formamidopyrimidine-DNA glycosylase; Provisional |
1-262 | 2.17e-18 | |||||
formamidopyrimidine-DNA glycosylase; Provisional Pssm-ID: 184410 [Multi-domain] Cd Length: 282 Bit Score: 82.28 E-value: 2.17e-18
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| Fapy_DNA_glyco | pfam01149 | Formamidopyrimidine-DNA glycosylase N-terminal domain; Formamidopyrimidine-DNA glycosylase ... |
1-104 | 2.23e-14 | |||||
Formamidopyrimidine-DNA glycosylase N-terminal domain; Formamidopyrimidine-DNA glycosylase (Fpg) is a DNA repair enzyme that excises oxidized purines from damaged DNA. This family is the N-terminal domain contains eight beta-strands, forming a beta-sandwich with two alpha-helices parallel to its edges. Pssm-ID: 460082 Cd Length: 116 Bit Score: 67.53 E-value: 2.23e-14
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| PRK14810 | PRK14810 | formamidopyrimidine-DNA glycosylase; Provisional |
1-262 | 7.84e-12 | |||||
formamidopyrimidine-DNA glycosylase; Provisional Pssm-ID: 173271 [Multi-domain] Cd Length: 272 Bit Score: 63.77 E-value: 7.84e-12
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| H2TH | pfam06831 | Formamidopyrimidine-DNA glycosylase H2TH domain; Formamidopyrimidine-DNA glycosylase (Fpg) is ... |
127-205 | 8.53e-10 | |||||
Formamidopyrimidine-DNA glycosylase H2TH domain; Formamidopyrimidine-DNA glycosylase (Fpg) is a DNA repair enzyme that excises oxidized purines from damaged DNA. This family is the central domain containing the DNA-binding helix-two turn-helix domain. Pssm-ID: 399664 [Multi-domain] Cd Length: 89 Bit Score: 54.22 E-value: 8.53e-10
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| AcNei1_N | cd08970 | N-terminal domain of the actinomycetal Nei1 and related DNA glycosylases; This family contains ... |
1-112 | 3.31e-09 | |||||
N-terminal domain of the actinomycetal Nei1 and related DNA glycosylases; This family contains the N-terminal domain of the actinomycetal Nei1 and related DNA glycosylases. It belongs to the FpgNei_N, [N-terminal domain of Fpg (formamidopyrimidine-DNA glycosylase, MutM)_Nei (endonuclease VIII)] domain superfamily. DNA glycosylases maintain genome integrity by recognizing base lesions created by ionizing radiation, alkylating or oxidizing agents, and endogenous reactive oxygen species. They initiate the base-excision repair process, which is completed with the help of enzymes such as phosphodiesterases, AP endonucleases, DNA polymerases and DNA ligases. DNA glycosylases cleave the N-glycosyl bond between the sugar and the damaged base, creating an AP (apurinic/apyrimidinic) site. Most FpgNei DNA glycosylases use their N-terminal proline residue as the key catalytic nucleophile, and the reaction proceeds via a Schiff base intermediate. This family contains mostly actinomycetes and includes Mycobacterium tuberculosis Nei1 (MtuNei1). MtuNei1 recognizes oxidized pyrimidines such as thymine glycol (Tg) and 5,6-dihydrouracil on both double stranded and single stranded DNA, it has a strong preference for the 5R isomer of Tg. In addition to this domain, enzymes belonging to this family contain a helix-two turn-helix (H2TH) domain and a zinc-finger motif. Pssm-ID: 176804 [Multi-domain] Cd Length: 110 Bit Score: 53.41 E-value: 3.31e-09
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| EcFpg-like_N | cd08966 | N-terminal domain of Escherichia coli Fpg1/MutM and related bacterial DNA glycosylases; This ... |
2-104 | 2.89e-08 | |||||
N-terminal domain of Escherichia coli Fpg1/MutM and related bacterial DNA glycosylases; This family contains the N-terminal domain of Escherichia coli Fpg1/MutM and related bacterial DNA glycosylases. It belongs to the FpgNei_N, [N-terminal domain of Fpg (formamidopyrimidine-DNA glycosylase, MutM)_Nei (endonuclease VIII)] domain superfamily. DNA glycosylases maintain genome integrity by recognizing base lesions created by ionizing radiation, alkylating or oxidizing agents, and endogenous reactive oxygen species. They initiate the base-excision repair process, which is completed with the help of enzymes such as phosphodiesterases, AP endonucleases, DNA polymerases and DNA ligases. DNA glycosylases cleave the N-glycosyl bond between the sugar and the damaged base, creating an AP (apurinic/apyrimidinic) site. Most FpgNei DNA glycosylases use their N-terminal proline residue as the key catalytic nucleophile, and the reaction proceeds via a Schiff base intermediate. Escherichia coli Fpg mainly recognizes and excises damaged purines such as 8-oxo-7,8-dihydroguanine (8-oxoG) and 2,6-diamino-4-hydroxy-5-formamidopyrimidine (FapyG). It is bifunctional, having both a DNA glycosylase (recognition activity) and a AP lyase activity. In addition to this EcFpg-like_N domain, enzymes belonging to this family contain a helix-two turn-helix (H2TH) domain and a zinc-finger motif, which also contribute residues to the active site. Pssm-ID: 176800 Cd Length: 120 Bit Score: 50.96 E-value: 2.89e-08
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| BaFpgNei_N_1 | cd08973 | Uncharacterized bacterial subgroup of the N-terminal domain of Fpg (formamidopyrimidine-DNA ... |
1-121 | 6.80e-08 | |||||
Uncharacterized bacterial subgroup of the N-terminal domain of Fpg (formamidopyrimidine-DNA glycosylase, MutM)_Nei (endonuclease VIII) base-excision repair DNA glycosylases; This family is an uncharacterized bacterial subgroup of the FpgNei_N domain superfamily. DNA glycosylases maintain genome integrity by recognizing base lesions created by ionizing radiation, alkylating or oxidizing agents, and endogenous reactive oxygen species. They initiate the base-excision repair process, which is completed with the help of enzymes such as phosphodiesterases, AP endonucleases, DNA polymerases and DNA ligases. DNA glycosylases cleave the N-glycosyl bond between the sugar and the damaged base, creating an AP (apurinic/apyrimidinic) site. Most FpgNei DNA glycosylases use their N-terminal proline residue as the key catalytic nucleophile, and the reaction proceeds via a Schiff base intermediate. This N-terminal proline is conserved in this family. Escherichia coli Fpg prefers 8-oxo-7,8-dihydroguanine (8-oxoG) and oxidized purines and Escherichia coli Nei recognizes oxidized pyrimidines. However, neither Escherichia coli Fpg or Nei belong to this family. In addition to this BaFpgNei_N_1 domain, enzymes belonging to this family contain a helix-two turn-helix (H2TH) domain and a zinc-finger motif. Pssm-ID: 176807 Cd Length: 122 Bit Score: 49.94 E-value: 6.80e-08
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| zf-FPG_IleRS | pfam06827 | Zinc finger found in FPG and IleRS; This zinc binding domain is found at the C-terminus of ... |
235-262 | 1.00e-05 | |||||
Zinc finger found in FPG and IleRS; This zinc binding domain is found at the C-terminus of isoleucyl tRNA synthetase and the enzyme Formamidopyrimidine-DNA glycosylase EC:3.2.2.23. Pssm-ID: 429140 [Multi-domain] Cd Length: 28 Bit Score: 41.42 E-value: 1.00e-05
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| PF_Nei_N | cd08972 | N-terminal domain of the plant and fungal Nei and related proteins; This family contains the ... |
1-53 | 3.49e-05 | |||||
N-terminal domain of the plant and fungal Nei and related proteins; This family contains the N-terminal domain of plant and Fungi Nei and related proteins. It belongs to the FpgNei_N, [N-terminal domain of Fpg (formamidopyrimidine-DNA glycosylase, MutM)_Nei (endonuclease VIII)] domain superfamily. DNA glycosylases maintain genome integrity by recognizing base lesions created by ionizing radiation, alkylating or oxidizing agents, and endogenous reactive oxygen species. They initiate the base-excision repair process, which is completed with the help of enzymes such as phosphodiesterases, AP endonucleases, DNA polymerases and DNA ligases. DNA glycosylases cleave the N-glycosyl bond between the sugar and the damaged base, creating an AP (apurinic/apyrimidinic) site. Most FpgNei DNA glycosylases use their N-terminal proline residue as the key catalytic nucleophile, and the reaction proceeds via a Schiff base intermediate. The plant and fungal FpgNei glycosylases prefer the oxidized pyrimidines spiroiminodihydantoin (Sp), guanidinohydantoin (Gh) over 8-oxoguanine in double stranded oligonucleotides and also show weak activity on single stranded DNA. In addition to this domain, enzymes belonging to this family contain a helix-two turn-helix (H2TH) domain and a characteristic zincless finger motif. They share a common ancestor not shared with other eukaryotic members of the FpgNei family. Pssm-ID: 176806 Cd Length: 137 Bit Score: 42.68 E-value: 3.49e-05
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| BaFpgNei_N_2 | cd08974 | Uncharacterized bacterial subgroup of the N-terminal domain of Fpg (formamidopyrimidine-DNA ... |
1-107 | 4.05e-05 | |||||
Uncharacterized bacterial subgroup of the N-terminal domain of Fpg (formamidopyrimidine-DNA glycosylase, MutM)_Nei (endonuclease VIII) base-excision repair DNA glycosylases; This family is an uncharacterized bacterial subgroup of the FpgNei_N domain superfamily. DNA glycosylases maintain genome integrity by recognizing base lesions created by ionizing radiation, alkylating or oxidizing agents, and endogenous reactive oxygen species. They initiate the base-excision repair process, which is completed with the help of enzymes such as phosphodiesterases, AP endonucleases, DNA polymerases and DNA ligases. DNA glycosylases cleave the N-glycosyl bond between the sugar and the damaged base, creating an AP (apurinic/apyrimidinic) site. Most FpgNei DNA glycosylases use their N-terminal proline residue as the key catalytic nucleophile, and the reaction proceeds via a Schiff base intermediate. This N-terminal proline is conserved in this family. Escherichia coli Fpg prefers 8-oxo-7,8-dihydroguanine (8-oxoG) and oxidized purines, and Escherichia coli Nei recognizes oxidized pyrimidines. However, neither Escherichia coli Fpg or Nei belong to this family. In addition to this BaFpgNei_N_2 domain, enzymes belonging to this family contain a helix-two turn-helix (H2TH) domain. Most also contain a zinc-finger motif. Pssm-ID: 176808 Cd Length: 98 Bit Score: 41.54 E-value: 4.05e-05
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