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V6 encoded by mulberry crinkle leaf virus is important for viral DNA replication

文献类型：外文期刊

第一作者： Han, Pei-Yu

作者： Han, Pei-Yu;Yin, Zhen-Ni;Yang, Jing-Jing;Zhang, Meng-Si;Huang, Ying;Zhang, Jian;Lu, Quan-You;Zhang, Jian;Lu, Quan-You

作者机构：

关键词： Mulberry crinkle leaf virus; Mulcrilevirus; V6; Viral replication

期刊名称：VIROLOGY （影响因子：2.4；五年影响因子：2.5 ）

ISSN： 0042-6822

年卷期： 2025 年 603 卷

页码：

收录情况： SCI

摘要： Mulberry crinkle leaf virus (MCLV) is a representative species of the genus Mulcrilevirus in the family Geminiviridae. Here, we identified an additional V6 ORF which embedded within the V4 ORF in the MCLV virionsense strand. The expression of V6 was confirmed by analyzing the promoter activity of V6 ORF upstream sequences and quantifying the viral DNA accumulation in V6-mutant MCLV-infected tomato plants. Infectious clones of V6-mutant MCLV vII (pCA-1.1MCLVmv6) and V4 and V6 double-mutant MCLV vII (pCA1.1MCLVmV4mV6) were constructed, and experiments transfecting protoplasts isolated from Nicotiana benthamiana and infecting tomato using the constructs were performed. The results indicate that V6 plays a critical role in the multiplication of MCLV in protoplasts, although it has minimal, if any, impact on the systemic infection of MCLV in plants. Additionally, V4 and V6 positively regulate the MCLV DNA replication in synergistic form.

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