Permeabilization of ultraviolet-irradiated Chinese hamster cells with polyethylene glycol and introduction of ultraviolet endonuclease from Micrococcus luteus.

Molecular and Cellular Biology
D B Yarosh, R B Setlow

Abstract

Chinese hamster V-79 cells were made permeable by treatment with polyethylene glycol and then incubated with a Micrococcus luteus extract containing ultraviolet-specific endonuclease activity. This treatment introduced nicks in irradiated, but not in unirradiated, deoxyribonucleic acid. The nicks remained open for at least 3 h; there was no loss of endonuclease-sensitive sites, and no excision of dimers as measured by chromatography was detected. In addition, there was no increase in ultraviolet resistance in treated cells. This suggests that the absence of a significant amount of excision repair in rodent cells is due to the lack of both incision and excision capacity.

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Citations

Jan 5, 2008·Photochemistry and Photobiology·Malcolm S KeElma D Baron
Mar 26, 2011·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Angelika HoferPeter Wolf
Dec 1, 1984·International Journal of Radiation Biology and Related Studies in Physics, Chemistry, and Medicine·S M ChiuN L Oleinick
Mar 1, 1982·Analytical Biochemistry·H Felix

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