UV-B-induced DNA damage and repair pathways in polar Pseudogymnoascus sp. from the Arctic and Antarctic regions and their effects on growth, pigmentation, and coniodiogenesis
Wong, Hao Jie; Mohamad-Fauzi, Nuradilla; Rizman-Idid, Mohammed; Convey, Peter ORCID: https://orcid.org/0000-0001-8497-9903; Smykla, Jerzy; Alias, Siti Aisyah. 2022 UV-B-induced DNA damage and repair pathways in polar Pseudogymnoascus sp. from the Arctic and Antarctic regions and their effects on growth, pigmentation, and coniodiogenesis. Environmental Microbiology, 24 (7). 3164-3180. 10.1111/1462-2920.16073
Before downloading, please read NORA policies.
Text
Environmental Microbiology - 2022 - Wong - UV‐B‐induced DNA damage and repair pathways in polar Pseudogymnoascus sp from.pdf - Accepted Version Restricted to NORA staff only Download (4MB) | Request a copy |
Abstract/Summary
Solar radiation regulates most biological activities on Earth. Prolonged exposure to solar UV radiation can cause deleterious effects by inducing two major types of DNA damage, namely cyclobutane pyrimidine dimers (CPDs) and pyrimidine 6-4 pyrimidone photoproducts (6-4PPs). These lesions may be repaired by the photoreactivation (Phr) and nucleotide excision repair (NER) pathways; however, the principal UV-induced DNA repair pathway is not known in the fungal genus Pseudogymnoascus. In this study, we demonstrated that an unweighted UV-B dosage of 1.6 kJ m-2 d-1 significantly reduced fungal growth rates (by between 22 and 35%) and inhibited conidia production in a 10 d exposure. The comparison of two DNA repair conditions, light or dark, which respectively induced photoreactivation (Phr) and nucleotide excision repair (NER), showed that the UV-B induced CPDs were repaired significantly more rapidly in light than in dark conditions. The expression levels of two DNA repair genes, RAD2 and PHR1 (encoding a protein in NER and Phr, respectively) demonstrated that NER rather than Phr was primarily activated for repairing UV-B-induced DNA damage in these Pseudogymnoascus strains. In contrast, Phr was inhibited after exposure to UV-B radiation, suggesting that PHR1 may have other functional roles.
Item Type: | Publication - Article |
---|---|
Digital Object Identifier (DOI): | 10.1111/1462-2920.16073 |
ISSN: | 1462-2912 |
Additional Keywords: | Cyclobutane pyrimidine dimers, Pyrimidine 6-4 pyrimidone photoproducts, Photoreactivation, Nucleotide excision repair, Photolyase, Polar fungi |
Date made live: | 30 May 2022 09:03 +0 (UTC) |
URI: | https://nora.nerc.ac.uk/id/eprint/530581 |
Actions (login required)
View Item |
Document Downloads
Downloads for past 30 days
Downloads per month over past year