Yang Mengmeng, Wang Guiyao, Mu Wenjun, Guo Jianhua, Xi Jiaqin, Hu Liwei, Liang Kexin, Xu Qiang, Hu Zongyu, Song Jizhen
Key Laboratory of Eco-environment and Leaf Tobacco Quality, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, 450001, Henan, China.
China Tobacco Jiangsu Industry Co., Ltd, Nanjing, 210000, Jiangsu, China.
Arch Virol. 2022 Dec;167(12):2845-2850. doi: 10.1007/s00705-022-05618-0. Epub 2022 Oct 10.
Stagonosporopsis cucurbitacearum is an important plant-pathogenic fungus that causes stem and leaf blight diseases in a variety of crops. Here, we report the characterization of a novel victorivirus, tentatively named "Stagonosporopsis cucurbitacearum victorivirus 1" (ScVV-1), isolated from the S. cucurbitacearum isolate M-7. The ScVV-1 genome is 5,165 bp in length with a predicted GC content of 60.1% and contains two large open reading frames (ORF 1 and ORF2) encoding putative proteins that share significant sequence similarity with coat proteins (CPs) and RNA-dependent RNA polymerases (RdRps) of mycoviruses of the family Totiviridae. The ScVV-1 RdRp appears to be translated using a stop-initiation pentanucleotide UAAUG sequence. Phylogenetic analysis based on CP and RdRp amino acid (aa) sequences both indicated that ScVV-1 belongs to the genus Victorivirus in the family Totiviridae. To our knowledge, this is the first full-length genome sequence of a victorivirus infecting S. cucurbitacearum.
瓜类刺盘孢是一种重要的植物病原真菌,可导致多种作物发生茎枯病和叶枯病。在此,我们报告了从瓜类刺盘孢分离株M-7中分离出的一种新型病毒,暂命名为“瓜类刺盘孢病毒1”(ScVV-1)的特征。ScVV-1基因组长度为5165 bp,预测GC含量为60.1%,包含两个大的开放阅读框(ORF 1和ORF2),编码的假定蛋白与双链RNA病毒科真菌病毒的衣壳蛋白(CPs)和RNA依赖的RNA聚合酶(RdRps)具有显著的序列相似性。ScVV-1 RdRp似乎是利用终止起始五核苷酸UAAUG序列进行翻译的。基于CP和RdRp氨基酸(aa)序列的系统发育分析均表明,ScVV-1属于双链RNA病毒科中的病毒属。据我们所知,这是感染瓜类刺盘孢的病毒属病毒的首个全长基因组序列。