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Molecular characterization of a putative new cavemovirus isolated from wild chicory (Cichorium intybus)
Archives of Virology ( IF 2.5 ) Pub Date : 2021-07-22 , DOI: 10.1007/s00705-021-05172-1
Leonardo A Silva 1 , Brenda R de Camargo 1 , Marcelo Eiras 2 , Alexandre L R Chaves 2 , Bergmann M Ribeiro 1
Affiliation  

A putative new virus with sequence similarity to members of the genus Cavemovirus in the family Caulimoviridae was identified in wild chicory (Cichorium intybus) by next-generation sequencing (NGS). The putative new virus was tentatively named “chicory mosaic cavemovirus” (ChiMV), and its genome was determined to be 7,775 nucleotides (nt) long with the typical genome organization of cavemoviruses. ORF1 encodes a putative coat protein/movement polyprotein (1,278 aa), ORF2 encodes a putative replicase (650 aa), and ORF3 encodes a putative transactivator factor (384 aa). The first two putative proteins have 46.2% and 68.7% amino acid sequence identity to the CP/MP protein (YP_004347414) and replicase (YP_004347415), respectively, of sweet potato collusive virus (SPCV). ORF3 encodes a protein with 38.5% amino acid sequence identity to the putative transactivator factor (NP_056849) of cassava vein mosaic virus (CsVMV). The new putative viral genome and those of three cavemoviruses (epiphyllum virus 4 [EpV-4], SPCV, and CsVMV) differ by 24-27% in the nt sequence of the replicase gene, which exceeds the species demarcation cutoff (>20%) for the family.



中文翻译:


从野生菊苣 (Cichorium intybus) 中分离出的假定新穴状病毒的分子特征



通过下一代测序 (NGS) 在野生菊苣 ( Cichorium intybus ) 中鉴定出一种假定的新病毒,该病毒与茎病毒科中的穴状病毒属成员具有序列相似性。这种假定的新病毒暂定名为“菊苣花叶病毒”(ChiMV),其基因组确定为 7,775 个核苷酸 (nt) 长,具有典型的洞穴病毒基因组结构。 ORF1 编码假定的外壳蛋白/运动多蛋白(1,278 个氨基酸),ORF2 编码假定的复制酶(650 个氨基酸),ORF3 编码假定的反式激活因子(384 个氨基酸)。前两个推定蛋白与甘薯勾结病毒(SPCV)的CP/MP蛋白(YP_004347414)和复制酶(YP_004347415)分别具有46.2%和68.7%的氨基酸序列同一性。 ORF3 编码的蛋白质与木薯静脉花叶病毒 (CsVMV) 的推定反式激活因子 (NP_056849) 具有 38.5% 的氨基酸序列同一性。新的假定病毒基因组与三种洞穴病毒(昙花病毒 4 [EpV-4]、SPCV 和 CsVMV)的复制酶基因 nt 序列存在 24-27% 的差异,超过了物种分界截止值(>20% )为了家人。

更新日期:2021-09-07
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