DNA polymerase eta is specifically involved in DNA repair and plays an important role in translesion synthesis, where the normal high fidelity DNA polymerases cannot proceed and DNA synthesis stalls
DNA Polymerase eta; Pol eta, also called Rad30A, is a translesion synthesis (TLS) polymerase. ...
27-505
1.95e-166
DNA Polymerase eta; Pol eta, also called Rad30A, is a translesion synthesis (TLS) polymerase. Translesion synthesis is a process that allows the bypass of a variety of DNA lesions. TLS polymerases lack proofreading activity and have low fidelity and low processivity. They use damaged DNA as templates and insert nucleotides opposite the lesions. Unlike other Y-family members, Pol eta can efficiently and accurately replicate DNA past UV-induced lesions. Its activity is initiated by two simultaneous interactions: the PIP box in pol eta interacting with PCNA, and the UBZ (ubiquitin-binding zinc finger) in pol eta interacting with monoubiquitin attached to PCNA. Pol eta is more efficient in copying damaged DNA than undamaged DNA and seems to recognize when a lesion has been passed, facilitating a lesion-dependent dissociation from the DNA.
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Pssm-ID: 176456 [Multi-domain] Cd Length: 359 Bit Score: 479.50 E-value: 1.95e-166
DNA Polymerase eta; Pol eta, also called Rad30A, is a translesion synthesis (TLS) polymerase. ...
27-505
1.95e-166
DNA Polymerase eta; Pol eta, also called Rad30A, is a translesion synthesis (TLS) polymerase. Translesion synthesis is a process that allows the bypass of a variety of DNA lesions. TLS polymerases lack proofreading activity and have low fidelity and low processivity. They use damaged DNA as templates and insert nucleotides opposite the lesions. Unlike other Y-family members, Pol eta can efficiently and accurately replicate DNA past UV-induced lesions. Its activity is initiated by two simultaneous interactions: the PIP box in pol eta interacting with PCNA, and the UBZ (ubiquitin-binding zinc finger) in pol eta interacting with monoubiquitin attached to PCNA. Pol eta is more efficient in copying damaged DNA than undamaged DNA and seems to recognize when a lesion has been passed, facilitating a lesion-dependent dissociation from the DNA.
Pssm-ID: 176456 [Multi-domain] Cd Length: 359 Bit Score: 479.50 E-value: 1.95e-166
DNA Polymerase eta; Pol eta, also called Rad30A, is a translesion synthesis (TLS) polymerase. ...
27-505
1.95e-166
DNA Polymerase eta; Pol eta, also called Rad30A, is a translesion synthesis (TLS) polymerase. Translesion synthesis is a process that allows the bypass of a variety of DNA lesions. TLS polymerases lack proofreading activity and have low fidelity and low processivity. They use damaged DNA as templates and insert nucleotides opposite the lesions. Unlike other Y-family members, Pol eta can efficiently and accurately replicate DNA past UV-induced lesions. Its activity is initiated by two simultaneous interactions: the PIP box in pol eta interacting with PCNA, and the UBZ (ubiquitin-binding zinc finger) in pol eta interacting with monoubiquitin attached to PCNA. Pol eta is more efficient in copying damaged DNA than undamaged DNA and seems to recognize when a lesion has been passed, facilitating a lesion-dependent dissociation from the DNA.
Pssm-ID: 176456 [Multi-domain] Cd Length: 359 Bit Score: 479.50 E-value: 1.95e-166
Y-family of DNA polymerases; Y-family DNA polymerases are a specialized subset of polymerases ...
27-504
1.91e-93
Y-family of DNA polymerases; Y-family DNA polymerases are a specialized subset of polymerases that facilitate translesion synthesis (TLS), a process that allows the bypass of a variety of DNA lesions. Unlike replicative polymerases, TLS polymerases lack proofreading activity and have low fidelity and low processivity. They use damaged DNA as templates and insert nucleotides opposite the lesions. The active sites of TLS polymerases are large and flexible to allow the accomodation of distorted bases. Most TLS polymerases are members of the Y-family, including Pol eta, Pol kappa/IV, Pol iota, Rev1, and Pol V, which is found exclusively in bacteria. In eukaryotes, the B-family polymerase Pol zeta also functions as a TLS polymerase. Expression of Y-family polymerases is often induced by DNA damage and is believed to be highly regulated. TLS is likely induced by the monoubiquitination of the replication clamp PCNA, which provides a scaffold for TLS polymerases to bind in order to access the lesion. Because of their high error rates, TLS polymerases are potential targets for cancer treatment and prevention.
Pssm-ID: 176453 [Multi-domain] Cd Length: 343 Bit Score: 291.57 E-value: 1.91e-93
DNA Polymerase IV/Kappa; Pol IV, also known as Pol kappa, DinB, and Dpo4, is a translesion ...
28-458
1.84e-27
DNA Polymerase IV/Kappa; Pol IV, also known as Pol kappa, DinB, and Dpo4, is a translesion synthesis (TLS) polymerase. Translesion synthesis is a process that allows the bypass of a variety of DNA lesions. TLS polymerases lack proofreading activity and have low fidelity and low processivity. They use damaged DNA as templates and insert nucleotides opposite the lesions. Known primarily as Pol IV in prokaryotes and Pol kappa in eukaryotes, this polymerase has a propensity for generating frameshift mutations. The eukaryotic Pol kappa differs from Pol IV and Dpo4 by an N-terminal extension of ~75 residues known as the "N-clasp" region. The structure of Pol kappa shows DNA that is almost totally encircled by Pol kappa, with the N-clasp region augmenting the interactions between DNA and the polymerase. Pol kappa is more resistant than Pol eta and Pol iota to bulky guanine adducts and is efficient at catalyzing the incorporation of dCTP. Bacterial pol IV has a higher error rate than other Y-family polymerases.
Pssm-ID: 176459 [Multi-domain] Cd Length: 334 Bit Score: 113.39 E-value: 1.84e-27
DNA Polymerase iota; Pol iota, also called Rad30B, is a translesion synthesis (TLS) polymerase. ...
28-458
1.36e-18
DNA Polymerase iota; Pol iota, also called Rad30B, is a translesion synthesis (TLS) polymerase. Translesion synthesis is a process that allows the bypass of a variety of DNA lesions. TLS polymerases lack proofreading activity and have low fidelity and low processivity. They use damaged DNA as templates and insert nucleotides opposite the lesions. Pol iota is thought to be one of the least efficient polymerases, particularly when opposite pyrimidines; it can incorporate the correct nucleotide opposite a purine much more efficiently than opposite a pyrimidine, and prefers to insert guanosine instead of adenosine opposite thymidine. Pol iota is believed to use Hoogsteen rather than Watson-Crick base pairing, which may explain the varying efficiency for different template nucleotides.
Pssm-ID: 176457 [Multi-domain] Cd Length: 379 Bit Score: 87.91 E-value: 1.36e-18
umuC subunit of DNA Polymerase V; umuC subunit of Pol V. Pol V is a bacterial translesion ...
27-164
1.89e-09
umuC subunit of DNA Polymerase V; umuC subunit of Pol V. Pol V is a bacterial translesion synthesis (TLS) polymerase that consists of the heterotrimer of one umuC and two umuD subunits. Translesion synthesis is a process that allows the bypass of a variety of DNA lesions. TLS polymerases lack proofreading activity and have low fidelity and low processivity. They use damaged DNA as templates and insert nucleotides opposite the lesions. Pol V, RecA, single stranded DNA-binding protein, beta sliding clamp, and gamma clamp loading complex are responsible for inducing the SOS response in bacteria to repair UV-induced DNA damage.
Pssm-ID: 176454 [Multi-domain] Cd Length: 344 Bit Score: 59.48 E-value: 1.89e-09
DNA polymerase Rev1; Rev1 is a translesion synthesis (TLS) polymerase found in eukaryotes. ...
13-429
2.34e-09
DNA polymerase Rev1; Rev1 is a translesion synthesis (TLS) polymerase found in eukaryotes. Translesion synthesis is a process that allows the bypass of a variety of DNA lesions. TLS polymerases lack proofreading activity and have low fidelity and low processivity. They use damaged DNA as templates and insert nucleotides opposite the lesions. Rev1 has both structural and enzymatic roles. Structurally, it is believed to interact with other nonclassical polymerases and replication machinery to act as a scaffold. Enzymatically, it catalyzes the specific insertion of dCMP opposite abasic sites. Rev1 interacts with the Rev7 subunit of the B-family TLS polymerase Pol zeta (Rev3/Rev7). Rev1 is known to actively promote the introduction of mutations, potentially making it a significant target for cancer treatment.
Pssm-ID: 176455 [Multi-domain] Cd Length: 404 Bit Score: 59.63 E-value: 2.34e-09
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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Functional characterization of the conserved domain architecture found on the query.
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(labeled illustration) Standard Display shows only the best scoring domain model from each source, in each hit category listed below for each region on the query sequence.
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