Abstract
Potential Role of Accessory Domains in Polyproteins Encoded by Retrotransposons in Anti-viral Defense of Host Cells.
Highlights
Specialty section: This article was submitted to Virology, a section of the journal Frontiers in Microbiology
Transposon-encoded helicases were found to contain the full set of conserved motifs essential for their enzymatic activities (Morozov et al, 2017) and exhibit a weak, but detectable, ability to suppress RNA silencing in plant experimental system, as it was previously demonstrated for RNA helicase domains of some replicative tobamovirus proteins (Csorba et al, 2007; Wang et al, 2012; Lazareva et al, 2015)
Helicase-coding sequences represent actively transcribed insect genome regions, RNA helicase domains seem to perform no essential functions in retrotransposition and the transposon transcription/translation, and their functions can be considered as only accessory (Morozov et al, 2017)
Summary
Specialty section: This article was submitted to Virology, a section of the journal Frontiers in Microbiology. Another scenario implied that genome-integrated RNA virus coding sequences producing virus-related transcripts and proteins may be a tool for anti-viral defense in plants, fungi, and animals (Honda and Tomonaga, 2016; Morozov et al, 2017; Palatini et al, 2017; Warner et al, 2018).
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