The complete genome sequences of a negative single-stranded RNA virus and a double-stranded RNA virus coinfecting the entomopathogenic fungus Beauveria bassiana Vuillemin
文献类型： 外文期刊
作者： Xu, Mengnan 1 ; Liu, Hongyu 2 ; Jia, Xue 2 ; Zou, Xiaowei 2 ; Lu, Yizhuo 1 ; Sui, Li 2 ; Li, Qiyun 2 ; Zhang, Zhengkun 1 ; Liu, Jianfeng 1 ;
作者机构： 1.Jilin Normal Univ, Siping 136000, Peoples R China
2.Jilin Acad Agr Sci, Jilin Key Lab Agr Microbiol, Key Lab Integrated Pest Management Crops Northeast, Minist Agr & Rural Affairs,Inst Plant Protect, Changchun 130033, Peoples R China
3.Jilin Agr Univ, Changchun 130118, Peoples R China
4.Jilin Agr Sci & Technol Univ, Jilin 132101, Peoples R China
期刊名称：ARCHIVES OF VIROLOGY （ 影响因子：2.7； 五年影响因子：2.4 ）
ISSN： 0304-8608
年卷期： 2024 年 169 卷 3 期
页码：
收录情况： SCI
摘要： Beauveria bassiana Vuillemin is an entomopathogenic fungus that has been developed as a biological insecticide. B. bassiana can be infected by single or multiple mycoviruses, most of which are double-stranded RNA (dsRNA) viruses, while infections with single-stranded RNA (ssRNA) viruses, especially negative single-stranded RNA (-ssRNA) viruses, have been observed less frequently. In the present study, we sequenced and analyzed the complete genomes of two new different mycoviruses coinfecting a single B. bassiana strain: a -ssRNA virus which we have named "Beauveria bassiana negative-strand RNA virus 1" (BbNSRV1), and a dsRNA virus, which we have named "Beauveria bassiana orthocurvulavirus 1" (BbOCuV1). The genome of BbNSRV1 consists of a single segment of negative-sense, single-stranded RNA with a length of 6169 nt, containing a single open reading frame (ORF) encoding a putative RNA-dependent RNA polymerase (RdRp) with 1949 aa (220.1 kDa). BLASTx analysis showed that the RdRp had the highest sequence similarity (59.79%) to that of Plasmopara viticola lesion associated mononegaambi virus 2, a member of the family Mymonaviridae. This is the first report of a -ssRNA mycovirus infecting B. bassiana. The genome of BbOCuV1 consists of two dsRNA segments, 2164 bp and 1765 bp in length, respectively, with dsRNA1 encoding a protein with conserved RdRp motifs and 70.75% sequence identity to the putative RdRp of the taxonomically unassigned mycovirus Fusarium graminearum virus 5 (FgV5), and the dsRNA2 encoding a putative coat protein with sequence identity 64.26% to the corresponding protein of the FgV5. Phylogenetic analysis indicated that BbOCuV1 belongs to a taxonomically unassigned group of dsRNA mycoviruses related to members of the families Curvulaviridae and Partitiviridae. Hence, it might be the member of a new family that remains to be named and formally recognized.
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