Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR 97331, USA.
Mol Plant Pathol. 2003 Mar 1;4(2):91-8. doi: 10.1046/j.1364-3703.2003.00154.x.
SUMMARY Taxonomic relationship: Type member of the genus Closterovirus, family Closteroviridae. A member of the alphavirus-like supergroup of positive-strand RNA viruses. Physical properties: Virions are flexuous filaments of approximately 1300 nm in length and approximately 12 nm in diameter that are made up of a approximately 15.5 kb RNA and five proteins. The major capsid protein forms virion body of helical symmetry that constitutes approximately 95% of the virion length. The short virion tail is assembled by the minor capsid protein, Hsp70-homologue, approximately 64-kDa protein, and approximately 20-kDa protein. Viral proteins: The 5'-most ORFs 1a and 1b encode leader proteinase and RNA replicase. The remaining ORFs 2-8 are expressed by subgenomic mRNAs that encode 6-kDa membrane protein, Hsp70 homologue, approximately 64-kDa protein, minor and major capsid proteins, approximately 20-kDa protein, and approximately 21-kDa protein, respectively. Hosts: The principal crop plants affected by Beet yellows virus (BYV) are sugar beet (Beta vulgaris) and spinach (Spinacea oleracea). In addition, BYV was reported to infect approximately 120 species in 15 families. Most suitable propagation species are Nicotiana benthamiana, Tetragonia expansa, and Claytonia perfoliata.
摘要
该病毒是 Closterovirus 属的模式成员，属于 Closteroviridae 科。它是正链 RNA 病毒的甲型病毒样超级群的成员。
病毒粒子是大约 1300nm 长、12nm 直径的柔韧丝状结构，由大约 15.5kb 的 RNA 和五种蛋白质组成。主要衣壳蛋白形成螺旋对称的病毒体，构成病毒体长度的大约 95%。短的病毒尾巴由次要衣壳蛋白、Hsp70 同源物、大约 64kDa 蛋白和大约 20kDa 蛋白组装而成。
5'-最上游的 ORF1a 和 1b 编码前导蛋白水解酶和 RNA 复制酶。其余的 ORF2-8 通过亚基因组 mRNA 表达，编码 6kDa 膜蛋白、Hsp70 同源物、大约 64kDa 蛋白、次要和主要衣壳蛋白、大约 20kDa 蛋白和大约 21kDa 蛋白。
受甜菜黄化病毒（BYV）影响的主要作物是糖甜菜（Beta vulgaris）和菠菜（Spinacea oleracea）。此外，据报道，BYV 还感染了 15 个科的大约 120 个物种。最适合繁殖的物种是 Nicotiana benthamiana、Tetragonia expansa 和 Claytonia perfoliata。
