In vitro reconstitution of an efficient nucleotide excision repair system using mesophilic enzymes from Deinococcus radiodurans - Archive ouverte HAL Access content directly
Journal Articles Communications Biology Year : 2022

In vitro reconstitution of an efficient nucleotide excision repair system using mesophilic enzymes from Deinococcus radiodurans

Abstract

Nucleotide excision repair (NER) is a universal and versatile DNA repair pathway, capable of removing a very wide range of lesions, including UV-induced pyrimidine dimers and bulky adducts. In bacteria, NER involves the sequential action of the UvrA, UvrB and UvrC proteins to release a short 12- or 13-nucleotide DNA fragment containing the damaged site. Although bacterial NER has been the focus of numerous studies over the past 40 years, a number of key questions remain unanswered regarding the mechanisms underlying DNA damage recognition by UvrA, the handoff to UvrB and the site-specific incision by UvrC. In the present study, we have successfully reconstituted in vitro a robust NER system using the UvrABC proteins from the radiation resistant bacterium, Deinococcus radiodurans . We have investigated the influence of various parameters, including temperature, salt, protein and ATP concentrations, protein purity and metal cations, on the dual incision by UvrABC, so as to find the optimal conditions for the efficient release of the short lesion-containing oligonucleotide. This newly developed assay relying on the use of an original, doubly-labelled DNA substrate has allowed us to probe the kinetics of repair on different DNA substrates and to determine the order and precise sites of incisions on the 5′ and 3′ sides of the lesion. This new assay thus constitutes a valuable tool to further decipher the NER pathway in bacteria.
Fichier principal
Vignette du fichier
Seck et al. Comms Bio 2022.pdf (1.4 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

hal-03650082 , version 1 (24-04-2022)

Identifiers

Cite

Anna Seck, Salvatore de Bonis, Christine Saint-Pierre, Didier Gasparutto, Jean-Luc Ravanat, et al.. In vitro reconstitution of an efficient nucleotide excision repair system using mesophilic enzymes from Deinococcus radiodurans. Communications Biology, 2022, 5 (1), pp.127. ⟨10.1038/s42003-022-03064-x⟩. ⟨hal-03650082⟩
17 View
12 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More