ArticleChembiochem : a European journal of chemical biology2016
Mechanism of Error-Free Bypass of the Environmental Carcinogen N-(2'-Deoxyguanosin-8-yl)-3-aminobenzanthrone Adduct by Human DNA Polymerase η.
Article in Chembiochem : a European journal of chemical biology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Error-Prone and Error-Free Translesion DNA Synthesis over Site-Specifically Created DNA Adducts of Aryl Hydrocarbons (3-Nitrobenzanthrone and 4-Aminobiphenyl).Toxicological research · 2017Review
- Synthesis of Oligodeoxynucleotides Containing a C8-2'-Deoxyguanosine Adduct Formed by the Carcinogen 3-Nitrobenzanthrone.Current protocols in nucleic acid chemistry · 2017Article
- Translesion Synthesis of 2'-Deoxyguanosine Lesions by Eukaryotic DNA Polymerases.Chemical research in toxicology · 2017Article
- Pre-steady-state kinetic investigation of bypass of a bulky guanine lesion by human Y-family DNA polymerases.DNA repair · 2016Article
- Enzymatic bypass and the structural basis of miscoding opposite the DNA adduct 1,NThe Journal of biological chemistryArticle
Corrections and comments
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Authors and funding
8 authors.
Funding
Abstract
The environmental pollutant 3-nitrobenzanthrone produces bulky aminobenzanthrone (ABA) DNA adducts with both guanine and adenine nucleobases. A major product occurs at the C8 position of guanine (C8-dG-ABA). These adducts present a strong block to replicative polymerases but, remarkably, can be bypassed in a largely error-free manner by the human Y-family polymerase η (hPol η). Here, we report the crystal structure of a ternary Pol⋅DNA⋅dCTP complex between a C8-dG-ABA-containing template:primer duplex and hPol η. The complex was captured at the insertion stage and provides crucial insight into the mechanism of error-free bypass of this bulky lesion. Specifically, bypass involves accommodation of the ABA moiety inside a hydrophobic cleft to the side of the enzyme active site and formation of an intra-nucleotide hydrogen bond between the phosphate and ABA amino moiety, allowing the adducted guanine to form a standard Watson-Crick pair with the incoming dCTP.
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