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DNA photolyase from Antarctic marine bacterium Rhodococcus sp. NJ-530 can repair DNA damage caused by ultraviolet

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Abstract

Marine bacterium Rhodococcus sp. NJ-530 has developed several ultraviolet (UV) adaptive characteristics for survival and growth in extreme Antarctic environment. Rhodococcus sp. NJ-530 DNA photolyase encoded by a 1146 bp photolyase-homologous region (phr) was identified in genome. Quantitative real-time PCR demonstrated that transcriptional levels of phr were highly up-regulated by ultraviolet-B (UV-B) radiation (90 μW·cm−2) and increased to a maximum of 149.17-fold after exposure for 20 min. According to the results of SDS-PAGE and western blot, PHR was effectively induced by isopropyl-β-d-1-thiogalactopyranoside (IPTG) at the genetically engineered BL21(DE3)-pET-32a( +)-phr construct under the condition of 15 °C for 16 h and 37 °C for 4 h. In terms of in vivo activity, compared with a phr-defective E. coli strain, phr-transformed E. coli exhibited higher survival rate under high UV-B intensity of 90 μW·cm−2. Meanwhile, the purified PHR, with blue light, presented obvious photorepair activity toward UV-induced DNA damage in vitro assays. To sum up, studying the mechanisms of Rhodococcus sp. NJ-530 photolyase is of great interest to understand the adaptation of polar bacteria to high UV radiation, and such data present important therapeutic value for further UV-induced human skin and genetic damage diseases.

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Funding

This study was funded by the National Key Research and Development Program of China (2018YFD0900705), the China Ocean Mineral Resources R&D Association (DY135-B2-14), the Natural Science Foundation of China (41576187), the Natural Science Foundation of Shandong (ZR2019BD023), Key Research and Development Program of Shandong Province (2018GHY115034, 2018GHY115039), Ningbo Public Service Platform for High-Value Utilization of Marine Biological Resources (NBHY-2017-P2), and Youth Fund Project of Shandong Natural Science Foundation (ZR2017QD008).

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Contributions

Conceptualization: CQ and JM; methodology: YH, CQ and JM; formal analysis and investigation: YH, LZ; writing—original draft preparation: YH; writing—review and editing: YH; funding acquisition: CQ and JM; supervision: CQ and JM.

Corresponding authors

Correspondence to Changfeng Qu or Jinlai Miao.

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The authors declare that they have no conflict of interest.

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This article does not contain any studies with human participants or animals performed by any of the authors.

Supplementary Information

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Supplementary file1 Supplementary Fig. 1 Protein functional sites prediction of the amino acids sequence of Rhodococcus sp. NJ-530 PHR (TIF 73 KB)

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Supplementary file2 Supplementary Fig. 2 Phylogenetic tree of CPF. PHR from Rhodococcus sp. NJ-530, shown in red box, belongs to CPD Class I PHRs (TIF 3408 KB)

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Supplementary file3 Supplementary Fig. 3 Gene sequence of phr from Rhodococcus sp. NJ-530, before and after codon optimization for the next PHR expression (TIF 1723 KB)

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Supplementary file4 Supplementary Fig. 4 Protein sequence of PHR from Rhodococcus sp. NJ-530. Peptides matched the results of mass spectrometry (MS) shown in bold red (TIF 356 KB)

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He, Y., Qu, C., Zhang, L. et al. DNA photolyase from Antarctic marine bacterium Rhodococcus sp. NJ-530 can repair DNA damage caused by ultraviolet. 3 Biotech 11, 102 (2021). https://doi.org/10.1007/s13205-021-02660-8

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  • DOI: https://doi.org/10.1007/s13205-021-02660-8

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