数字农科院2.0

Geminiviruses encode additional small proteins with specific subcellular localizations and virulence function

文献类型： 外文期刊

作者： Pan Gong;Huang Tan;Siwen Zhao;Hao Li;Hui Liu;Yu Ma;Xi Zhang;Junjie Rong;Xing Fu;Rosa Lozano-Durán;Fangfang Li;Xueping Zhou

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期刊名称： Nature Communications

ISSN： 2041-1723

年卷期： 2021 年 12.0 卷 1.0 期

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收录情况： JCR（2021版）

摘要： Geminiviruses are plant viruses with limited coding capacity. Geminivirus-encoded proteins are traditionally identified by applying a 10-kDa arbitrary threshold; however, it is increasingly clear that small proteins play relevant roles in biological systems, which calls for the reconsideration of this criterion. Here, we show that geminiviral genomes contain additional ORFs. Using tomato yellow leaf curl virus, we demonstrate that some of these small ORFs are expressed during the infection, and that the encoded proteins display specific subcellular localizations. We prove that the largest of these additional ORFs, which we name V3, is required for full viral infection, and that the V3 protein localizes in the Golgi apparatus and functions as an RNA silencing suppressor. These results imply that the repertoire of geminiviral proteins can be expanded, and that getting a comprehensive overview of the molecular plant-geminivirus interactions will require the detailed study of small ORFs so far neglected.

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