DNA polymerase (pol2); All proteins in this superfamily for which functions are known are DNA ...
56-857
0e+00
DNA polymerase (pol2); All proteins in this superfamily for which functions are known are DNA polymerases.This family is based on the phylogenomic analysis of JA Eisen (1999, Ph.D. Thesis, Stanford University). [DNA metabolism, DNA replication, recombination, and repair]
The actual alignment was detected with superfamily member TIGR00592:
Pssm-ID: 273159 [Multi-domain] Cd Length: 1172 Bit Score: 923.30 E-value: 0e+00
DNA polymerase (pol2); All proteins in this superfamily for which functions are known are DNA ...
56-857
0e+00
DNA polymerase (pol2); All proteins in this superfamily for which functions are known are DNA polymerases.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: 273159 [Multi-domain] Cd Length: 1172 Bit Score: 923.30 E-value: 0e+00
inactive DEDDy 3'-5' exonuclease domain of eukaryotic DNA polymerase alpha, a family-B DNA ...
542-774
1.05e-121
inactive DEDDy 3'-5' exonuclease domain of eukaryotic DNA polymerase alpha, a family-B DNA polymerase; The 3'-5' exonuclease domain of eukaryotic DNA polymerase alpha. DNA polymerase alpha is a family-B DNA polymerase with a catalytic subunit that contains a DnaQ-like 3'-5' exonuclease domain. It is one of the three DNA-dependent type B DNA polymerases (delta and epsilon are the other two) that have been identified as essential for nuclear DNA replication in eukaryotes. DNA polymerase alpha is almost exclusively required for the initiation of DNA replication and the priming of Okazaki fragments during elongation. It associates with DNA primase and is the only enzyme able to start DNA synthesis de novo. The catalytic subunit contains both polymerase and 3'-5' exonuclease domains, but only exhibits polymerase activity. The 3'-5' exonuclease domain contains three sequence motifs termed ExoI, ExoII and ExoIII, without the four conserved acidic residues that are crucial for metal binding and catalysis. This explains why in most organisms, that no specific repair role, other than check point control, has been assigned to this enzyme. The exonuclease domain may have a structural role.
Pssm-ID: 99819 [Multi-domain] Cd Length: 234 Bit Score: 366.94 E-value: 1.05e-121
DNA polymerase type-B family; DNA polymerase alpha, delta, epsilon and zeta chain (eukaryota), ...
542-857
7.88e-48
DNA polymerase type-B family; DNA polymerase alpha, delta, epsilon and zeta chain (eukaryota), DNA polymerases in archaea, DNA polymerase II in e. coli, mitochondrial DNA polymerases and and virus DNA polymerases
Pssm-ID: 214691 [Multi-domain] Cd Length: 474 Bit Score: 177.34 E-value: 7.88e-48
DNA polymerase (pol2); All proteins in this superfamily for which functions are known are DNA ...
56-857
0e+00
DNA polymerase (pol2); All proteins in this superfamily for which functions are known are DNA polymerases.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: 273159 [Multi-domain] Cd Length: 1172 Bit Score: 923.30 E-value: 0e+00
inactive DEDDy 3'-5' exonuclease domain of eukaryotic DNA polymerase alpha, a family-B DNA ...
542-774
1.05e-121
inactive DEDDy 3'-5' exonuclease domain of eukaryotic DNA polymerase alpha, a family-B DNA polymerase; The 3'-5' exonuclease domain of eukaryotic DNA polymerase alpha. DNA polymerase alpha is a family-B DNA polymerase with a catalytic subunit that contains a DnaQ-like 3'-5' exonuclease domain. It is one of the three DNA-dependent type B DNA polymerases (delta and epsilon are the other two) that have been identified as essential for nuclear DNA replication in eukaryotes. DNA polymerase alpha is almost exclusively required for the initiation of DNA replication and the priming of Okazaki fragments during elongation. It associates with DNA primase and is the only enzyme able to start DNA synthesis de novo. The catalytic subunit contains both polymerase and 3'-5' exonuclease domains, but only exhibits polymerase activity. The 3'-5' exonuclease domain contains three sequence motifs termed ExoI, ExoII and ExoIII, without the four conserved acidic residues that are crucial for metal binding and catalysis. This explains why in most organisms, that no specific repair role, other than check point control, has been assigned to this enzyme. The exonuclease domain may have a structural role.
Pssm-ID: 99819 [Multi-domain] Cd Length: 234 Bit Score: 366.94 E-value: 1.05e-121
DEDDy 3'-5' exonuclease domain of family-B DNA polymerases; The 3'-5' exonuclease domain of ...
546-764
3.19e-51
DEDDy 3'-5' exonuclease domain of family-B DNA polymerases; The 3'-5' exonuclease domain of family-B DNA polymerases. This domain has a fundamental role in reducing polymerase errors and is involved in proofreading activity. Family-B DNA polymerases contain an N-terminal DEDDy DnaQ-like exonuclease domain in the same polypeptide chain as the polymerase domain, similar to family-A DNA polymerases. This domain contains three sequence motifs termed ExoI, ExoII and ExoIII, with a specific YX(3)D pattern at ExoIII. These motifs are clustered around the active site and contain four conserved acidic residues that serve as ligands for the two metal ions required for catalysis. The exonuclease domain of family B polymerase also contains a beta hairpin structure that plays an important role in active site switching in the event of nucleotide misincorporation. Members include Escherichia coli DNA polymerase II, some eubacterial phage DNA polymerases, nuclear replicative DNA polymerases (alpha, delta, epsilon and zeta), and eukaryotic viral and plasmid-borne enzymes. Nuclear DNA polymerases alpha and zeta lack the four conserved acidic metal-binding residues. Family-B DNA polymerases are predominantly involved in DNA replication and DNA repair.
Pssm-ID: 176646 [Multi-domain] Cd Length: 199 Bit Score: 177.93 E-value: 3.19e-51
DNA polymerase type-B family; DNA polymerase alpha, delta, epsilon and zeta chain (eukaryota), ...
542-857
7.88e-48
DNA polymerase type-B family; DNA polymerase alpha, delta, epsilon and zeta chain (eukaryota), DNA polymerases in archaea, DNA polymerase II in e. coli, mitochondrial DNA polymerases and and virus DNA polymerases
Pssm-ID: 214691 [Multi-domain] Cd Length: 474 Bit Score: 177.34 E-value: 7.88e-48
DNA polymerase alpha subunit p180 N terminal; This domain family is found in eukaryotes, and ...
41-101
5.57e-14
DNA polymerase alpha subunit p180 N terminal; This domain family is found in eukaryotes, and is approximately 70 amino acids in length. The family is found in association with pfam00136, pfam08996, pfam03104. This family is the N terminal of DNA polymerase alpha subunit p180 protein. The N terminal contains the catalytic region of the alpha subunit.
Pssm-ID: 463508 Cd Length: 65 Bit Score: 67.19 E-value: 5.57e-14
DNA polymerase family B; This region of DNA polymerase B appears to consist of more than one ...
781-857
8.27e-11
DNA polymerase family B; This region of DNA polymerase B appears to consist of more than one structural domain, possibly including elongation, DNA-binding and dNTP binding activities.
Pssm-ID: 395085 Cd Length: 439 Bit Score: 64.94 E-value: 8.27e-11
Uncharacterized bacterial subgroup of the DEDDy 3'-5' exonuclease domain of family-B DNA ...
590-750
1.96e-09
Uncharacterized bacterial subgroup of the DEDDy 3'-5' exonuclease domain of family-B DNA polymerases; A subfamily of the 3'-5' exonuclease domain of family-B DNA polymerases. This subfamily is composed of uncharacterized bacterial family-B DNA polymerases. Family-B DNA polymerases contain an N-terminal DEDDy DnaQ-like exonuclease domain in the same polypeptide chain as the polymerase domain, similar to family-A DNA polymerases. This exonuclease domain contains three sequence motifs termed ExoI, ExoII and ExoIII, with a specific YX(3)D pattern at ExoIII. These motifs are involved in metal binding and catalysis. The exonuclease domain of family-B DNA polymerases has a fundamental role in proofreading activity. It contains a beta hairpin structure that plays an important role in active site switching in the event of a nucleotide misincorporation. Family-B DNA polymerases are predominantly involved in DNA replication and DNA repair.
Pssm-ID: 99828 [Multi-domain] Cd Length: 207 Bit Score: 58.19 E-value: 1.96e-09
DEDDy 3'-5' exonuclease domain of Pyrococcus kodakaraensis Kod1 and similar archaeal family-B ...
605-762
6.41e-09
DEDDy 3'-5' exonuclease domain of Pyrococcus kodakaraensis Kod1 and similar archaeal family-B DNA polymerases; The 3'-5' exonuclease domain of archaeal family-B DNA polymerases with similarity to Pyrococcus kodakaraensis Kod1, including polymerases from Desulfurococcus (D. Tok Pol) and Thermococcus gorgonarius (Tgo Pol). Kod1, D. Tok Pol, and Tgo Pol are thermostable enzymes that exhibit both polymerase and 3'-5' exonuclease activities. They are family-B DNA polymerases. Their amino termini harbor a DEDDy-type DnaQ-like 3'-5' exonuclease domain that contains three sequence motifs termed ExoI, ExoII and ExoIII, with a specific YX(3)D pattern at ExoIII. These motifs are clustered around the active site and are involved in metal binding and catalysis. The exonuclease domain of family B polymerases contains a beta hairpin structure that plays an important role in active site switching in the event of nucleotide misincorporation. Members of this subfamily show similarity to eukaryotic DNA polymerases involved in DNA replication. Some archaea possess multiple family-B DNA polymerases. Phylogenetic analyses of eubacterial, archaeal, and eukaryotic family-B DNA polymerases support independent gene duplications during the evolution of archaeal and eukaryotic family-B DNA polymerases.
Pssm-ID: 99823 [Multi-domain] Cd Length: 195 Bit Score: 56.59 E-value: 6.41e-09
DEDDy 3'-5' exonuclease domain of Escherichia coli DNA polymerase II and similar bacterial ...
611-699
2.77e-07
DEDDy 3'-5' exonuclease domain of Escherichia coli DNA polymerase II and similar bacterial family-B DNA polymerases; The 3'-5' exonuclease domain of Escherichia coli DNA polymerase II (Pol II) and similar bacterial proteins. Pol II is a family-B DNA polymerase. Family-B DNA polymerases contain an N-terminal DEDDy DnaQ-like exonuclease domain in the same polypeptide chain as the polymerase domain, similar to family-A DNA polymerases. This exonuclease domain contains three sequence motifs termed ExoI, ExoII and ExoIII, with a specific YX(3)D pattern at ExoIII. These motifs are clustered around the active site and are involved in metal binding and catalysis. The exonuclease domain has a fundamental role in the proofreading activity of polII. It contains a beta hairpin structure that plays an important role in active site switching in the event of a nucleotide misincorporation. Pol II is involved in a variety of cellular activities, such as the repair of DNA damaged by UV irradiation or oxidation. It plays a pivotal role in replication-restart, a process that bypasses DNA damage in an error-free manner. Pol II is also involved in lagging strand synthesis.
Pssm-ID: 99827 [Multi-domain] Cd Length: 193 Bit Score: 51.80 E-value: 2.77e-07
DEDDy 3'-5' exonuclease domain of eukaryotic DNA polymerase delta, a family-B DNA polymerase; ...
621-675
4.70e-07
DEDDy 3'-5' exonuclease domain of eukaryotic DNA polymerase delta, a family-B DNA polymerase; The 3'-5' exonuclease domain of eukaryotic DNA polymerase delta. DNA polymerase delta is a family-B DNA polymerase with a catalytic subunit that contains a DEDDy-type DnaQ-like 3'-5' exonuclease domain. It is one of the three DNA-dependent type B DNA polymerases (alpha and epsilon are the other two) that have been identified as essential for nuclear DNA replication in eukaryotes. DNA polymerase delta is the enzyme responsible for both elongation and maturation of Okazaki fragments on the lagging strand. It is also implicated in mismatch repair (MMR) and base excision repair (BER). The catalytic subunit displays both polymerase and 3'-5' exonuclease activities. The exonuclease domain contains three sequence motifs termed ExoI, ExoII and ExoIII, with a specific YX(3)D pattern at ExoIII. These motifs are clustered around the active site and contain four conserved acidic residues necessary for metal binding and catalysis. The exonuclease domain of family B polymerase also contains a beta hairpin structure that plays an important role in active site switching in the event of nucleotide misincorporation.
Pssm-ID: 99820 [Multi-domain] Cd Length: 230 Bit Score: 51.81 E-value: 4.70e-07
inactive DEDDy 3'-5' exonuclease domain of eukaryotic DNA polymerase zeta, a family-B DNA ...
613-763
8.25e-05
inactive DEDDy 3'-5' exonuclease domain of eukaryotic DNA polymerase zeta, a family-B DNA polymerase; The 3'-5' exonuclease domain of eukaryotic DNA polymerase zeta. DNA polymerase zeta is a family-B DNA polymerase which is distantly related to DNA polymerase delta. It plays a major role in translesion replication and the production of either spontaneous or induced mutations. In addition, DNA polymerase zeta also appears to be involved in somatic hypermutability in B lymphocytes, an important element for the production of high affinity antibodies in response to an antigen. The catalytic subunit contains both polymerase and 3'-5' exonuclease domains, but only exhibits polymerase activity. The DnaQ-like 3'-5' exonuclease domain contains three sequence motifs termed ExoI, ExoII and ExoIII, without the four conserved acidic residues that are crucial for metal binding and catalysis.
Pssm-ID: 99821 [Multi-domain] Cd Length: 231 Bit Score: 44.92 E-value: 8.25e-05
DNA polymerase type-B alpha subfamily catalytic domain. Three DNA-dependent DNA polymerases ...
839-857
4.22e-04
DNA polymerase type-B alpha subfamily catalytic domain. Three DNA-dependent DNA polymerases type B (alpha, delta, and epsilon) have been identified as essential for nuclear DNA replication in eukaryotes. DNA polymerase (Pol) alpha is almost exclusively required for the initiation of DNA replication and the priming of Okazaki fragments during elongation. In most organisms no specific repair role, other than check point control, has been assigned to this enzyme. Pol alpha contains both polymerase and exonuclease domains, but lacks exonuclease activity suggesting that the exonuclease domain may be for structural purposes only.
Pssm-ID: 99915 Cd Length: 400 Bit Score: 43.72 E-value: 4.22e-04
DEDDy 3'-5' exonuclease domain of Sulfurisphaera ohwakuensis DNA polymerase B3 and similar ...
622-762
4.90e-04
DEDDy 3'-5' exonuclease domain of Sulfurisphaera ohwakuensis DNA polymerase B3 and similar archaeal family-B DNA polymerases; The 3'-5' exonuclease domain of archaeal proteins with similarity to Sulfurisphaera ohwakuensis DNA polymerase B3. B3 is a family-B DNA polymerase. Family-B DNA polymerases contain an N-terminal DEDDy DnaQ-like exonuclease domain in the same polypeptide chain as the polymerase domain, similar to family-A DNA polymerases. B3 exhibits both polymerase and 3'-5' exonuclease activities. This exonuclease domain contains three sequence motifs termed ExoI, ExoII and ExoIII, with a specific YX(3)D pattern at ExoIII. These motifs are clustered around the active site and are involved in metal binding and catalysis. The exonuclease domain of family B polymerases also contains a beta hairpin structure that plays an important role in active site switching in the event of nucleotide misincorporation. Archaeal proteins that are involved in DNA replication are similar to those from eukaryotes. Some archaea possess multiple family-B DNA polymerases. B3 is mainly found in crenarchaea. Phylogenetic analyses of eubacterial, archaeal, and eukaryotic family B-DNA polymerases support independent gene duplications during the evolution of archaeal and eukaryotic family-B DNA polymerases.
Pssm-ID: 99824 [Multi-domain] Cd Length: 188 Bit Score: 41.93 E-value: 4.90e-04
Database: CDSEARCH/cdd Low complexity filter: no Composition Based Adjustment: yes E-value threshold: 0.01
References:
Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
of the residues that compose this conserved feature have been mapped to the query sequence.
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The table lists conserved domains identified on the query sequence. Click on the plus sign (+) on the left to display full descriptions, alignments, and scores.
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