The V2 protein encoded by a monopartite begomovirus is a suppressor of both post-transcriptional and transcriptional gene silencing activity

被引：9

作者：

Mubin, Muhammad ^{[1
,2
]}

Briddon, Rob W. ^{[2
]}

Mansoor, Shahid ^{[2
]}

机构：

[1] Univ Agr Faisalabad, Ctr Agr Biochem & Biotechnol, Virol Lab, Faisalabad 38000, Pakistan

[2] Natl Inst Biotechnol & Genet Engn, Agr Biotechnol Div, Jhang Rd, Faisalabad, Pakistan

来源：

GENE | 2019年 / 686卷

关键词：

Geminivirus; Begomovirus; Post-transcriptional gene silencing; Transcriptional gene silencing; Suppression; LEAF CURL DISEASE; TRANSIENT EXPRESSION; GEMINIVIRUS AL2; RNA; VIRUS; TOMATO; DNA; METHYLATION; DEFENSE;

D O I：

10.1016/j.gene.2018.11.002

中图分类号：

Q3 [遗传学];

学科分类号：

071007 ; 090102 ;

摘要：

Papaya leaf curl virus (PaLCuV) is a begomovirus (genus Begomovirus; family Geminiviridae) with a monopartite genome that is usually associated with beta- and alphasatellites in plants. Geminiviruses are DNA viruses with small circular genomes that occur as minichromosomes in the nucleus and are susceptible to post-transcriptional gene silencing (PTGS) and transcriptional gene silencing (TGS). Transient expression of the PaLCuV V2 (PV2) protein together with the green fluorescent protein (GFP) in Nicotiana benthamiana resulted in enhanced levels of GFP fluorescence and GFP mRNA, indicative of suppression of PTGS. Expression of PV2 from a Potato virus X vector restored GFP expression in N. benthamiana plants harbouring a transcriptionally silenced GFP transgene, indicative of suppression of TGS. The results show that the PV2 protein encoded by PaLCuV has both suppressor of PTGS and TGS activity and is an important factor in overcoming host RNA-silencing based defenses.

引用

页码：43 / 48

页数：6

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