Geminiviruses are an important group of viruses that infect a variety of plants and result in heavy agricultural losses worldwide.The homologs of C4(or L4)in monopartite geminiviruses and AC4(or AL4)in bipartite gemin...Geminiviruses are an important group of viruses that infect a variety of plants and result in heavy agricultural losses worldwide.The homologs of C4(or L4)in monopartite geminiviruses and AC4(or AL4)in bipartite geminiviruses are critical viral proteins.The C4 proteins from several geminiviruses are the substrates of S-acylation,a dynamic posttranslational modification,for the maintenance of their membrane localization and function in virus infection.Here we initiated a screening and identified a plant protein ABAPT3(Alpha/Beta Hydrolase Domain-containing Protein 17-like Acyl Protein Thioesterase 3)as the de-S-acylation enzyme of C4 encoded by BSCTV(Beet severe curly top virus).Overexpression of ABAPT3 reduced the S-acylation of BSCTV C4,disrupted its plasma membrane localization,inhibited its function in pathogenesis,and suppressed BSCTV infection.Because the S-acylation motifs are conserved among C4 from different geminiviruses,we tested the effect of ABAPT3 on the C4 protein of ToLCGdV(Tomato leaf curl Guangdong virus)from another geminivirus genus.Consistently,ABAPT3 overexpression also disrupted the S-acylation,subcellular localization,and function of ToLCGdV C4,and inhibited ToLCGdV infection.In summary,we provided a new approach to globally improve the resistance to different types of geminiviruses in plants via de-Sacylation of the viral C4 proteins and it can be extendedly used for suppression of geminivirus infection in crops.展开更多
基金supported by the Major Program of Guangdong Basic and Applied Research(2019B030302006)National Natural Science Foundation of China(32270752,31970531,32270292,32272509)+2 种基金Natural Science Foundation of Guangdong(2024A1515011071,2021A1515011151,2019A1515110330)Guangdong Modern Agro-industry Technology Research System(2023KJ114)the Program for Changjiang Scholars,and the Guangdong Special Support Program of Young Top-Notch Talent in Science and Technology Innovation(2019TQ05N651).
文摘Geminiviruses are an important group of viruses that infect a variety of plants and result in heavy agricultural losses worldwide.The homologs of C4(or L4)in monopartite geminiviruses and AC4(or AL4)in bipartite geminiviruses are critical viral proteins.The C4 proteins from several geminiviruses are the substrates of S-acylation,a dynamic posttranslational modification,for the maintenance of their membrane localization and function in virus infection.Here we initiated a screening and identified a plant protein ABAPT3(Alpha/Beta Hydrolase Domain-containing Protein 17-like Acyl Protein Thioesterase 3)as the de-S-acylation enzyme of C4 encoded by BSCTV(Beet severe curly top virus).Overexpression of ABAPT3 reduced the S-acylation of BSCTV C4,disrupted its plasma membrane localization,inhibited its function in pathogenesis,and suppressed BSCTV infection.Because the S-acylation motifs are conserved among C4 from different geminiviruses,we tested the effect of ABAPT3 on the C4 protein of ToLCGdV(Tomato leaf curl Guangdong virus)from another geminivirus genus.Consistently,ABAPT3 overexpression also disrupted the S-acylation,subcellular localization,and function of ToLCGdV C4,and inhibited ToLCGdV infection.In summary,we provided a new approach to globally improve the resistance to different types of geminiviruses in plants via de-Sacylation of the viral C4 proteins and it can be extendedly used for suppression of geminivirus infection in crops.
