ArticleActa naturae
Thermodynamics of Damaged DNA Binding and Catalysis by Human AP Endonuclease 1.
Article in Acta naturae. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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14 citing papers in PubMed, 29 citations in OpenAlex.
- An Insight into the Mechanism of DNA Cleavage by DNA Endonuclease from the Hyperthermophilic ArchaeonInternational journal of molecular sciences · 2024Article
- Insights into Mechanisms of Damage Recognition and Catalysis by APE1-like Enzymes.International journal of molecular sciences · 2022Article
- Comparative Analysis of Exo- and Endonuclease Activities of APE1-like Enzymes.International journal of molecular sciences · 2022Article
- Kinetic Analysis of the Interaction of Nicking Endonuclease BspD6I with DNA.Biomolecules · 2021Article
- Common Kinetic Mechanism of Abasic Site Recognition by Structurally Different Apurinic/Apyrimidinic Endonucleases.International journal of molecular sciences · 2021Article
- The Enigma of Substrate Recognition and Catalytic Efficiency of APE1-Like Enzymes.Frontiers in cell and developmental biology · 2021Article
- Mutational and Kinetic Analysis of APE1 Endoribonuclease Activity.Molecular biology · 2021Article
- The Role of Active-Site Plasticity in Damaged-Nucleotide Recognition by Human Apurinic/Apyrimidinic Endonuclease APE1.Molecules (Basel, Switzerland) · 2020Article
- Activity of Human Apurinic/Apyrimidinic Endonuclease APE1 Toward Damaged DNA and Native RNA With Non-canonical Structures.Frontiers in cell and developmental biology · 2020Article
- Substrate specificity of human apurinic/apyrimidinic endonuclease APE1 in the nucleotide incision repair pathway.Nucleic acids research · 2018Article
- Kinetic Features of 3'-5' Exonuclease Activity of Human AP-Endonuclease APE1.Molecules (Basel, Switzerland) · 2018Article
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Apurinic/apyrimidinic (AP) endonucleases play an important role in DNA repair and initiation of AP site elimination. One of the most topical problems in the field of DNA repair is to understand the mechanism of the enzymatic process involving the human enzyme APE1 that provides recognition of AP sites and efficient cleavage of the 5'-phosphodiester bond. In this study, a thermodynamic analysis of the interaction between APE1 and a DNA substrate containing a stable AP site analog lacking the C1' hydroxyl group (F site) was performed. Based on stopped-flow kinetic data at different temperatures, the steps of DNA binding, catalysis, and DNA product release were characterized. The changes in the standard Gibbs energy, enthalpy, and entropy of sequential specific steps of the repair process were determined. The thermodynamic analysis of the data suggests that the initial step of the DNA substrate binding includes formation of non-specific contacts between the enzyme binding surface and DNA, as well as insertion of the amino acid residues Arg177 and Met270 into the duplex, which results in the removal of "crystalline" water molecules from DNA grooves. The second binding step involves the F site flipping-out process and formation of specific contacts between the enzyme active site and the everted 5'-phosphate-2'-deoxyribose residue. It was shown that non-specific interactions between the binding surfaces of the enzyme and DNA provide the main contribution into the thermodynamic parameters of the DNA product release step.
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27099790PMC4837577W2428398873What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.