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Tang Q, Tang J, Chen C, Zhu F, Yu Q, Chen H, Chen L, Ma S, Chen K, Li G. Bombyx mori RPL13 participates in UV-induced DNA damage repair of B. mori nucleopolyhedrovirus through interaction with Bm65. INSECT MOLECULAR BIOLOGY 2024. [PMID: 38801334 DOI: 10.1111/imb.12928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 05/01/2024] [Indexed: 05/29/2024]
Abstract
Ribosomal protein L13 (RPL13) is highly conserved in evolution. At present, the properties and functions of RPL13 have not been characterised in insects. In this study, Bombyx mori RPL13 (BmRPL13) was first found to be specifically recruited to the sites of ultraviolet (UV)-induced DNA damage and contributed to UV damage repair. Escherichia coli expressing BmRPL13 showed better resistance to UV radiation. After knocking down the expression of BmRPL13 in BmN cells, the repair speed of UV-damaged DNA slowed down. The further results showed that BmRPL13 interacted with B. mori nucleopolyhedrovirus (BmNPV) ORF65 (Bm65) protein to locate at the UV-induced DNA damage sites of BmNPV and helped repair UV-damaged viral DNA.
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Affiliation(s)
- Qi Tang
- Department of Biological Sciences, School of Life Sciences, Jiangsu University, Zhenjiang, China
| | - Jingjing Tang
- Department of Biological Sciences, School of Life Sciences, Jiangsu University, Zhenjiang, China
| | - Ceru Chen
- Department of Biological Sciences, School of Life Sciences, Jiangsu University, Zhenjiang, China
| | - Feifei Zhu
- Department of Biological Sciences, School of Life Sciences, Jiangsu University, Zhenjiang, China
| | - Qian Yu
- Department of Biological Sciences, School of Life Sciences, Jiangsu University, Zhenjiang, China
| | - Huiqing Chen
- Department of Biological Sciences, School of Life Sciences, Jiangsu University, Zhenjiang, China
| | - Liang Chen
- Department of Biological Sciences, School of Life Sciences, Jiangsu University, Zhenjiang, China
| | - Shangshang Ma
- Department of Biological Sciences, School of Life Sciences, Jiangsu University, Zhenjiang, China
| | - Keping Chen
- Department of Biological Sciences, School of Life Sciences, Jiangsu University, Zhenjiang, China
| | - Guohui Li
- Department of Biological Sciences, School of Life Sciences, Jiangsu University, Zhenjiang, China
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BmNPV Orf 65 (Bm65) Is Identified as an Endonuclease Directly Facilitating UV-Induced DNA Damage Repair. J Virol 2022; 96:e0055722. [PMID: 35862702 PMCID: PMC9327686 DOI: 10.1128/jvi.00557-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Baculoviruses have been used as biopesticides for the control of Lepidoptera larvae. However, solar UV radiation reduces the activity of baculovirus. In this study, an UV endonuclease, Bm65, was found encoded in the genome of Bombyx mori nuclear polyhedrosis virus (BmNPV). Bm65 (the ortholog of AcMNPV orf79) was guided by a key nuclear localization signal to enter the nucleus and accumulated at UV-induced DNA damage sites. Subsequent results further showed that Bm65-mediated DNA damage repair was not the only UV damage repair pathway of BmNPV. BmNPV also used host DNA repair proteins to repair UV-induced DNA damage. In summary, these results revealed that Bm65 was very important in UV-induced DNA damage repair of BmNPV, and BmNPV repaired UV-damaged DNA through a variety of ways. IMPORTANCE Baculovirus biopesticides are environmentally friendly insecticides and specifically infect invertebrates. UV radiation from the sunlight greatly reduces the activity of baculovirus biopesticides. However, the molecular mechanisms of most baculoviruses to repair UV-induced DNA damage remain unclear. Nucleotide excision repair (NER) is a major DNA repair pathway that removes UV-induced DNA lesions. At present, there are few reports about the nucleotide excision repair pathway in viruses. Here, we showed for the first time that the baculovirus Bm65 endonuclease actually cleaved UV-damaged DNA. Meanwhile, we found that BmNPV used both viral-encoded enzymes and host DNA damage repair proteins to reverse UV-induced DNA damage. These results will provide a reference for the research of UV damage repair of other viruses.
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