Photoreactivation in an archaeon from geothermal environments
نویسندگان
چکیده
منابع مشابه
Rates of spontaneous mutation in an archaeon from geothermal environments.
To estimate the efficacy of mechanisms which may prevent or repair thermal damage to DNA in thermophilic archaea, a quantitative assay of forward mutation at extremely high temperature was developed for Sulfolobus acidocaldarius, based on the selection of pyrimidine-requiring mutants resistant to 5-fluoro-orotic acid. Maximum-likelihood analysis of spontaneous mutant distributions in wild-type ...
متن کاملGenome sequence of an oligohaline hyperthermophilic archaeon, Thermococcus zilligii AN1, isolated from a terrestrial geothermal freshwater spring.
Thermococcus zilligii, a thermophilic anaerobe in freshwater, is useful for physiological research and biotechnological applications. Here we report the high-quality draft genome sequence of T. zilligii AN1(T). The genome contains a number of genes for an immune system and adaptation to a microbial biomass-rich environment as well as hydrogenase genes.
متن کاملPhotoreactivation of Transforming DNA by an Enzyme from Bakers' Yeast
Ultraviolet-inactivated Hemophilus influenzae transforming DNA recovers its activity when mixed with cell-free extracts of bakers' yeast and exposed to visible light. The active agent in the extract is not used up in the reaction, and purification has not separated it into more than one non-dialyzable component. It differs from the agent in Escherichia coli extract, which produces very similar ...
متن کاملPhotoreactivation in humans.
Photoreactivation is a DNA repair pathway that requires the presence of a photoreactivating enzyme, DNA photolyase. DNA photolyase recognizes and binds specifically to ultraviolet radiation (UVR)-induced cyclobutane pyrimidine dimers in DNA. Exposure of the photolyase-dimer complex to wavelengths in the range of 300-500 nm results, upon absorption of a photon, in the return of the dimerized pyr...
متن کاملPhotoreactivation in airborne Mycobacterium parafortuitum.
Photoreactivation was observed in airborne Mycobacterium parafortuitum exposed concurrently to UV radiation (254 nm) and visible light. Photoreactivation rates of airborne cells increased with increasing relative humidity (RH) and decreased with increasing UV dose. Under a constant UV dose with visible light absent, the UV inactivation rate of airborne M. parafortuitum cells decreased by a fact...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Microbiology
سال: 1997
ISSN: 1350-0872,1465-2080
DOI: 10.1099/00221287-143-4-1071