A novel mycovirus with the proposed name "Magnaporthe oryzae narnavirus virus 1" (MoNV1), was described in the rice blast fungus Magnaporthe oryzae. The virus has a single-stranded (+ss) RNA genome of 2452 nucleotides, contains a single open reading frame (ORF) predicted to encode an RNA-dependent RNA polymerase (RDRP), and is closely related to some viruses of the genus Narnavirus, family Narnaviridae, including Aspergillus fumigatus narnavirus 1 (AfNV1), Neofusicoccum parvum narnavirus 2 (NpNV2) and Alternaria tenuissima narnavirus 1 (AtNV2). Genome sequence comparisons and phylogenetic analysis suggested that MoNV1 is a new member of the genus Narnavirus. The RDRPs of MoNV1 and some closely related narnaviruses do not contain a typical metal-binding "GDD" motif and catalytic site. Further studies are needed to investigate the replication mechanism of these viruses.

中文翻译：

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一种来自植物致病性真菌稻瘟病菌的新型narnavirus。

在稻瘟病菌Magnaporthe oryzae中描述了一种新的分枝杆菌病毒，其拟议名称为“稻瘟病菌narnavirus病毒1”（MoNV1）。该病毒具有2452个核苷酸的单链（+ ss）RNA基因组，包含一个预测为编码RNA依赖性RNA聚合酶（RDRP）的单个开放阅读框（ORF），并且与Narnavirus属的某些病毒密切相关，纳奈科病毒科，包括烟曲霉纳那病毒1（AfNV1），小镰刀菌新奇纳瓦病毒2（NpNV2）和牛带链球菌纳那病毒1（AtNV2）。基因组序列比较和系统发育分析表明，MoNV1是鼻病毒属的新成员。MoNV1和一些密切相关的纳纳病毒的RDRP不包含典型的金属结合“ GDD”基序和催化位点。