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Size Restriction Is Required for Proper Functioning of a Bipartite Begomovirus AC4 Protein

文献类型： 外文期刊

作者： Zhang, Wenwen 1 ; Liu, Shunmin 1 ; Xie, Guohui 1 ; Li, Xiuyu 1 ; Zhai, Yingying 1 ; Lin, Wenzhong 1 ; Wu, Zujian 1 ; Du, Zhenguo 1 ; Zhang, Jie 1 ;

作者机构： 1.Fujian Agr & Forestry Univ, Inst Plant Virol, Fujian Key Lab Plant Virol, Fuzhou 350002, Peoples R China

2.Fujian Agr & Forestry Univ, Ministerial & Prov Joint Innovat Ctr Safety Prod C, Fuzhou 350002, Peoples R China

3.Zhejiang Acad Agr Sci, Citrus Res Inst, Taizhou 318020, Peoples R China

关键词： AC4; begomovirus; geminivirus; tomato leaf curl Hsinchu virus

期刊名称：MOLECULAR PLANT-MICROBE INTERACTIONS （ 2022影响因子：3.5； 五年影响因子：4.1 ）

ISSN： 0894-0282

年卷期： 2023 年 36 卷 12 期

页码：

收录情况： SCI

摘要： Many geminiviruses, including members of the genus Begomovirus, produce a protein known as C4 or AC4. Whereas C4/AC4 typically consists of more than 80 amino acid residues, a few are much shorter. The significance of these shorter C4/AC4 proteins in viral infection and why the virus maintains their abbreviated length is not yet understood. The AC4 of the begomovirus Tomato leaf curl Hsinchu virus contains only 65 amino acids, but it extends to 96 amino acids when the natural termination codon is replaced with a normal codon. We discovered that both interrupting and extending AC4 were harmful to tomato leaf curl Hsinchu virus (ToLCHsV). The extended AC4 (EAC4) also showed a reduced ability to promote the infection of the heterologous virus Potato virus X than the wild-type AC4. When the wild-type AC4 was fused with yellow fluorescent protein (AC4-YFP), it was predominantly found in chloroplasts, whereas EAC4-YFP was mainly localized to the cell periphery. These results suggest that ToLCHsV's AC4 protein is important for viral infection, and the virus may benefit from the abbreviated length, because it may lead to chloroplast localization.Copyright (c) 2023 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

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