期刊
FRONTIERS IN MOLECULAR BIOSCIENCES
卷 7, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fmolb.2020.609732
关键词
RSV; tRF; biogenesis; ELAC2; viral replication
资金
- NIH [R01 AI116812, R21AG069226]
- FAMRI Clinical Innovator Award [160020]
Research has found that RSV infection induces the production of tRNA-derived RNA fragments tRFs, with tRF5-GlnCTG promoting RSV replication and being regulated by ribonuclease ELAC2. Additionally, ELAC2 is associated with RSV N and NS1 proteins, indicating a potential new therapeutic target for combating RSV infection.
Respiratory syncytial virus (RSV) is the most common cause of lower respiratory tract infection in young children. However, effective treatment against RSV is unavailable. tRNA-derived RNA fragments (tRFs) are a recently discovered family of non-coding RNAs. We made an early observation that RSV infection causes significant induction of tRFs, which are mainly derived from the 5'-end of mature tRNAs (tRF5). However, their functions and biogenesis mechanism are not fully understood. Herein, we identified an enzyme responsible for the induction of a functional tRF5 derived from tRNA-Gln-CTG (tRF5-GlnCTG). We found that tRF5-GlnCTG promotes RSV replication and its induction, assessed by Northern blot and a new qRT-PCR-based method, is regulated by ribonuclease ELAC2. ELAC2-mediated tRF5 induction has never been reported. We also found that ELAC2 is associated with RSV N and NS1 proteins. Given the fact that tRF5-GlnCTG plays a role in RSV replication, the identification of ELAC2 being responsible for tRF5-GlnCTG induction could provide new insights into therapeutic strategy development against RSV infection.
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