Srifah P, Keese P, Weiller G, Gibbs A
Department of Plant Pathology, Kasetsart University, Bangkok, Thailand.
J Gen Virol. 1992 Jun;73 ( Pt 6):1437-47. doi: 10.1099/0022-1317-73-6-1437.
The nucleotide sequence of the genome of erysimum latent tymovirus (ELV) has been determined. It closely resembles those of the other four sequenced tymoviral genomes in its gene organization and composition, but is the smallest (6034 nucleotides) and most distinct of them. Furthermore the 78 non-coding nucleotides at the 3' terminus of the ELV genome are unable to form a complete tRNA-like structure like that reported for other tymoviruses. Comparisons of the five tymovirus genomes and their encoded proteins indicate that they have probably evolved from the progenitor tymovirus by independent progressive mutational change without genetic recombination. Comparisons of the sequences of the two non-virion proteins of five tymoviruses, and virion proteins of 17 tymoviruses, revealed no specific similarities between those of ELV and turnip yellow mosaic virus that could explain why their host ranges and symptoms are so similar, yet differ, in this respect, from ononis yellow mosaic, kennedya yellow mosaic and eggplant mosaic tymoviruses.
已确定了糖芥潜隐芜菁黄花叶病毒（ELV）基因组的核苷酸序列。它在基因组织和组成上与其他四个已测序的芜菁黄花叶病毒基因组极为相似，但却是其中最小的（6034个核苷酸）且最为独特。此外，ELV基因组3'末端的78个非编码核苷酸无法形成像其他芜菁黄花叶病毒所报道的那样完整的类似tRNA的结构。对五个芜菁黄花叶病毒基因组及其编码蛋白的比较表明，它们可能是通过独立的渐进性突变变化而非基因重组从始祖芜菁黄花叶病毒进化而来。对五个芜菁黄花叶病毒的两种非病毒粒子蛋白以及17种芜菁黄花叶病毒的病毒粒子蛋白序列的比较显示，ELV与芜菁黄花叶病毒之间没有特定的相似性，这可以解释为什么它们的宿主范围和症状如此相似却又不同，而在这方面，与芒柄花黄花叶病毒、肯氏豆黄花叶病毒和茄子花叶芜菁黄花叶病毒不同。
