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昆虫逆转录转座子编码的多肽对全长病毒解旋酶结构域的获取。

Acquisition of Full-Length Viral Helicase Domains by Insect Retrotransposon-Encoded Polypeptides.

作者信息

Lazareva Ekaterina, Lezzhov Alexander, Vassetzky Nikita, Solovyev Andrey, Morozov Sergey

机构信息

Department of Virology, Faculty of Biology, Lomonosov Moscow State University Moscow, Russia.

Laboratory of Eukaryotic Genome Evolution, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences Moscow, Russia.

出版信息

Front Microbiol. 2015 Dec 22;6:1447. doi: 10.3389/fmicb.2015.01447. eCollection 2015.

DOI:10.3389/fmicb.2015.01447
PMID:26733982
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4686597/
Abstract

Recent metagenomic studies in insects identified many sequences unexpectedly closely related to plant virus genes. Here we describe a new example of this kind, insect R1 LINEs with an additional C-terminal domain in their open reading frame 2. This domain is similar to NTPase/helicase (SF1H) domains, which are found in replicative proteins encoded by plant viruses of the genus Tobamovirus. We hypothesize that the SF1H domain could be acquired by LINEs, directly or indirectly, upon insect feeding on virus-infected plants. Possible functions of this domain in LINE transposition and involvement in LINEs counteraction the silencing-based cell defense against retrotransposons are discussed.

摘要

近期对昆虫的宏基因组研究意外发现了许多与植物病毒基因密切相关的序列。在此，我们描述了这类情况的一个新例子，即昆虫R1 LINEs在其开放阅读框2中带有一个额外的C末端结构域。该结构域类似于NTPase/解旋酶（SF1H）结构域，在烟草花叶病毒属植物病毒编码的复制蛋白中存在。我们推测，LINEs可能在昆虫取食病毒感染的植物后直接或间接获得了SF1H结构域。本文还讨论了该结构域在LINE转座中的可能功能，以及其参与LINEs对抗基于沉默的细胞对逆转录转座子防御的情况。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/acd2/4686597/c68f19b16798/fmicb-06-01447-g0001.jpg

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