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Hu ZG, Cao MY, Zhu Y, Wang J, Lin Y, Chen P, Lu C, Dong ZQ, Pan MH. BmNPV Bm60 is a key target gene used by a resistant strain of Bombyx mori to inhibit BmNPV proliferation. Int J Biol Macromol 2024; 264:130842. [PMID: 38484820 DOI: 10.1016/j.ijbiomac.2024.130842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/22/2024] [Accepted: 03/11/2024] [Indexed: 03/18/2024]
Abstract
Bombyx mori nucleopolyhedrovirus (BmNPV) is a pathogen that causes significant losses to the silkworm industry. Numerous antiviral genes and proteins have been identified by studying silkworm resistance to BmNPV. However, the molecular mechanism of silkworm resistance to BmNPV is unclear. We analyzed the differences between the susceptible strain 871 and a near-isogenic resistant strain 871C. The survival of strain 871C was significantly greater than that of 871 after oral and subcutaneous exposure to BmNPV. Strain 871C exhibited a nearly 10,000-fold higher LD50 for BmNPV compared to 871. BmNPV proliferation was significantly inhibited in all tested tissues of strain 871C using HE strain and fluorescence analysis. Strain 871C exhibited cellular resistance to BmNPV rather than peritrophic membrane or serum resistance. Strain 871C suppressed the expression of the viral early gene Bm60. This led to the inhibition of BmNPV DNA replication and late structural gene transcription based on the cascade regulation of baculovirus gene expression. Bm60 could also interact with the viral DNA binding protein and alkaline nuclease, as well as host proteins Methylcrotonoyl-CoA carboxylase subunit alpha, mucin-2-like protein, and 30 K-8. Overexpression of 30 K-8 significantly inhibited BmNPV proliferation. These results increase understanding of the molecular mechanism behind silkworm resistance to BmNPV and suggest targets for the breeding of resistant silkworm strains and the controlling pest of Lepidoptera.
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Affiliation(s)
- Zhi-Gang Hu
- State Key Laboratory of Resource Insects, Southwest University, Chongqing 400716, China
| | - Ming-Ya Cao
- State Key Laboratory of Resource Insects, Southwest University, Chongqing 400716, China; Joint National Laboratory for Antibody Drug Engineering, The First Affiliated Hospital, School of Medicine, Henan University, Kaifeng 475004, China
| | - Yan Zhu
- State Key Laboratory of Resource Insects, Southwest University, Chongqing 400716, China
| | - Jie Wang
- State Key Laboratory of Resource Insects, Southwest University, Chongqing 400716, China
| | - Yu Lin
- State Key Laboratory of Resource Insects, Southwest University, Chongqing 400716, China
| | - Peng Chen
- State Key Laboratory of Resource Insects, Southwest University, Chongqing 400716, China; Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400716, China
| | - Cheng Lu
- State Key Laboratory of Resource Insects, Southwest University, Chongqing 400716, China; Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400716, China
| | - Zhan-Qi Dong
- State Key Laboratory of Resource Insects, Southwest University, Chongqing 400716, China; Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400716, China.
| | - Min-Hui Pan
- State Key Laboratory of Resource Insects, Southwest University, Chongqing 400716, China; Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400716, China.
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Zhang X, Ma S, Gu C, Hu M, Miao M, Quan Y, Yu W. K64 acetylation of heat shock protein 90 suppresses nucleopolyhedrovirus replication in Bombyx mori. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2024; 115:e22079. [PMID: 38288491 DOI: 10.1002/arch.22079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 12/03/2023] [Accepted: 12/13/2023] [Indexed: 02/01/2024]
Abstract
HSP90 is a highly conserved chaperone that facilitates the proliferation of many viruses, including silkworm (bombyx mori) nucleopolyhedrovirus (BmNPV), but the underlying regulatory mechanism was unclear. We found that suppression of HSP90 by 17-AAG, a HSP90-specific inhibitor, significantly reduced the expression of BmNPV capsid protein gp64 and viral genome replication, whereas overexpression of B. mori HSP90(BmHSP90) promoted BmNPV replication. Furthermore, in a recent study of the lysine acetylome of B. mori infected with BmNPV, we focused on the reduced viral proliferation due to changes of BmHSP90 lysine acetylation. Site-directed introduction of acetylated (K/Q) or deacetylated (K/R) mimic mutations into BmHSP90 revealed that lysine 64 (K64) acetylation activated the JAK/STAT pathway and reduced BmHSP90 ATPase activity, leading to diminished chaperone activity and ultimately inhibiting BmNPV proliferation. In this study, a single lysine 64 acetylation change of BmHSP90 was elucidated as a model of posttranslational modifications occurring in the wake of host-virus interactions, providing novel insights into potential antiviral strategies.
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Affiliation(s)
- Xizhen Zhang
- Department of Biopharmaceuticals, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, Zhejiang, China
| | - Shiyi Ma
- Department of Biopharmaceuticals, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, Zhejiang, China
| | - Chaoguang Gu
- Department of Biopharmaceuticals, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, Zhejiang, China
| | - Miao Hu
- Department of Biopharmaceuticals, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, Zhejiang, China
| | - Meng Miao
- Department of Biopharmaceuticals, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, Zhejiang, China
| | - Yanping Quan
- Department of Biopharmaceuticals, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, Zhejiang, China
| | - Wei Yu
- Department of Biopharmaceuticals, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, Zhejiang, China
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Liang Z, Xue R, Zhang X, Cao M, Sun S, Zhang Y, Zhu M, Zhang Z, Dai K, Pan J, Cao G, Wang C, Hu X, Gong C. β-Arrestin 2 acts an adaptor protein that facilitates viral replication in silkworm. Int J Biol Macromol 2022; 208:1009-1018. [PMID: 35381288 DOI: 10.1016/j.ijbiomac.2022.03.213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 07/24/2021] [Accepted: 03/31/2022] [Indexed: 11/19/2022]
Abstract
β-Arrestin 2 is known to be a widely distributed adaptor protein in mammals but its function has never been reported in Lepidoptera insects. Herein, the β-Arrestin 2 (BmArrestin 2) gene from silkworm was cloned and characterized. The spatiotemporal expression level of BmArrestin 2 was highest in the gonads at the 3rd day of 5th instar, whereas the highest and lowest abundance of BmArrestin 2 were identified in the tracheal and testis, respectively. BmArrestin 2 is mainly distributed in the cytoplasm. Furthermore, in BmN cells,overexpression of BmArrestin 2 promoted Bombyx mori nucleopolyhedrovirus (BmNPV) and B. mori cytoplasmic polyhedrosis virus (BmCPV) replication as the increment of the concentration of plasmid transfection, whereas silencing the gene with specific siRNA inhibited viral replication. Replication of BmNPV and BmCPV also was weakened using BmArrestin 2 antiserum as the increment of the concentration. Immunofluorescent staining revealed the invasion of recombinant BmNPV or BmCPV was decreased after blocking endogenous BmArrestin 2. On the other hand, BmArrestin 2 co-localizes with recombinant BmNPV and BmCPV virions in BmN cells. These results suggest that BmArrestin 2 may represent a novel target for antiviral strategies, as it is an adaptor protein that plays a key role in virus replication.
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Affiliation(s)
- Zi Liang
- School of Biology & Basic Medical Science, Soochow University, Suzhou 215123, China
| | - Renyu Xue
- School of Biology & Basic Medical Science, Soochow University, Suzhou 215123, China
| | - Xing Zhang
- School of Biology & Basic Medical Science, Soochow University, Suzhou 215123, China
| | - Manman Cao
- School of Biology & Basic Medical Science, Soochow University, Suzhou 215123, China
| | - Sufei Sun
- School of Biology & Basic Medical Science, Soochow University, Suzhou 215123, China
| | - Yunshan Zhang
- School of Biology & Basic Medical Science, Soochow University, Suzhou 215123, China
| | - Min Zhu
- School of Biology & Basic Medical Science, Soochow University, Suzhou 215123, China
| | - Ziyao Zhang
- School of Biology & Basic Medical Science, Soochow University, Suzhou 215123, China
| | - Kun Dai
- School of Biology & Basic Medical Science, Soochow University, Suzhou 215123, China
| | - Jun Pan
- School of Biology & Basic Medical Science, Soochow University, Suzhou 215123, China
| | - Guangli Cao
- School of Biology & Basic Medical Science, Soochow University, Suzhou 215123, China; Institute of Agricultural Biotechnology and Ecological Research, Soochow University, Suzhou 215123, China
| | - Chonglong Wang
- School of Biology & Basic Medical Science, Soochow University, Suzhou 215123, China; Institute of Agricultural Biotechnology and Ecological Research, Soochow University, Suzhou 215123, China
| | - Xiaolong Hu
- School of Biology & Basic Medical Science, Soochow University, Suzhou 215123, China; Institute of Agricultural Biotechnology and Ecological Research, Soochow University, Suzhou 215123, China.
| | - Chengliang Gong
- School of Biology & Basic Medical Science, Soochow University, Suzhou 215123, China; Institute of Agricultural Biotechnology and Ecological Research, Soochow University, Suzhou 215123, China.
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In silico tertiary structure prediction and evolutionary analysis of two DNA-binding proteins (DBP-1 and DBP-2) from Hyposidra talaca nucleopolyhedrovirus (HytaNPV). Biologia (Bratisl) 2021. [DOI: 10.2478/s11756-020-00665-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Kang X, Wang Y, Liang W, Tang X, Zhang Y, Wang L, Zhao P, Lu Z. Bombyx mori nucleopolyhedrovirus downregulates transcription factor BmFoxO to elevate virus infection. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2021; 116:103904. [PMID: 33245980 DOI: 10.1016/j.dci.2020.103904] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 10/16/2020] [Accepted: 10/18/2020] [Indexed: 06/11/2023]
Abstract
Forkhead-box O (FoxO) is the primary transcriptional effector of the insulin-like signaling pathway that enhances gluconeogenesis through transcriptional activation of PEPCK and G6Pase in mammals. We have previously demonstrated the involvement of phosphoenolpyruvate carboxykinase (BmPEPCK-2) in antiviral immunity against the multiplication of Bombyx mori nuclearpolyhedrosisvirus (BmNPV) in silkworm. Therefore, we speculated that BmFoxO might suppress BmNPV by regulating the expression of PEPCK in silkworm. In the present study, we found that the expression of BmFoxO decreased after BmNPV infection in Bombyx mori; this finding was consistent with BmPEPCK-2 expression. In addition, the expression of BmFoxO was altered, and it was found that reduced expression of BmFoxO (dsBmFoxO) downregulated the expression of BmPEPCK-2 and increased the viral fluorescence and content in silkworm embryonic cell line BmE cells, and vice versa. BmFoxO could upregulate the expression of BmPEPCK-2 by binding to the BmPEPCK-2 promoter. Moreover, overexpression of BmFoxO significantly increased the expression of autophagy genes ATG6/7/8 after infection with BmNPV, consistent with BmPEPCK-2. These results indicate that BmNPV downregulates transcription factor BmFoxO to elevate virus infection, and BmFoxO overexpression upregulates BmPEPCK-2 expression and enhances silkworm antiviral resistance.
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Affiliation(s)
- Xiaoli Kang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, PR China; Biological Science Research Center, Southwest University, Chongqing, 400715, PR China
| | - Yaping Wang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, PR China; Biological Science Research Center, Southwest University, Chongqing, 400715, PR China
| | - Wenjuan Liang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, PR China; Biological Science Research Center, Southwest University, Chongqing, 400715, PR China
| | - Xin Tang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, PR China; Biological Science Research Center, Southwest University, Chongqing, 400715, PR China
| | - Yan Zhang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, PR China; Biological Science Research Center, Southwest University, Chongqing, 400715, PR China; Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, 400715, PR China
| | - Lingyan Wang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, PR China; Biological Science Research Center, Southwest University, Chongqing, 400715, PR China; Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, 400715, PR China
| | - Ping Zhao
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, PR China; Biological Science Research Center, Southwest University, Chongqing, 400715, PR China; Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, 400715, PR China
| | - Zhongyan Lu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, PR China; Biological Science Research Center, Southwest University, Chongqing, 400715, PR China; Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, 400715, PR China.
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6
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Mao F, Chen X, Ngowo J, Zhu Y, Lei J, Gao X, Miao M, Quan Y, Yu W. Deacetylation of HSC70-4 Promotes Bombyx mori Nucleopolyhedrovirus Proliferation via Proteasome-Mediated Nuclear Import. Front Physiol 2021; 12:609674. [PMID: 33679433 PMCID: PMC7935516 DOI: 10.3389/fphys.2021.609674] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 01/29/2021] [Indexed: 01/18/2023] Open
Abstract
Silkworm (Bombyx mori) is a model organism with great agricultural economic value that plays a crucial role in biological studies. B. mori nucleopolyhedrovirus (BmNPV) is a major viral pathogen found in silkworms, which leads to huge silk loss annually. In a recent lysine acetylome of silkworm infected with BmNPV, we focused on the heat shock cognate protein 70-4 (HSC70-4) lysine acetylation change due to the consequent nuclear accumulation and viral structure assembly. In this study, the genome replication, proliferation, and production of budded viruses (BVs) were arrested by HSP/HSC70 inhibitor treatment. However, HSC70-4 overexpression enhanced BmNPV reproduction. Furthermore, site-direct mutagenesis for acetylated mimic (K/Q) or deacetylated mimic (K/R) mutants of HSC70-4 demonstrated that lysine 77 (K77) deacetylation promotes HSC70-4 stability, viral DNA duplication, and HSC70-4 nuclear entry upon BmNPV challenge, and the nuclear propulsion of HSC70-4 after viral stimulus might be dependent on the interaction with the carboxyl terminus of HSC70-interacting protein (CHIP, an E3 ubiquitin ligase), followed by ubiquitin-proteasome system assistance. In this study, single lysine 77 deacetylation of HSC70-4 was deemed a part of the locomotive pathway for facilitating BmNPV proliferation and provided novel insights into the antiviral strategic development.
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Affiliation(s)
- Fuxiang Mao
- Institute of Biochemistry, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, China
| | - Xi Chen
- Institute of Biochemistry, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, China
| | - Jonas Ngowo
- Institute of Biochemistry, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, China
| | - Yajie Zhu
- Institute of Biochemistry, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, China
| | - Jihai Lei
- Institute of Biochemistry, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, China
| | - Xu Gao
- Institute of Biochemistry, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, China
| | - Meng Miao
- Institute of Biochemistry, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, China
| | - Yanping Quan
- Institute of Biochemistry, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, China
| | - Wei Yu
- Institute of Biochemistry, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China.,Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou, China
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