Regulation of gene expression via retrotransposon insertions and the noncoding RNA 4.5S RNAH

Genes to Cells : Devoted to Molecular & Cellular Mechanisms
Kentaro IshidaShinichi Nakagawa

Abstract

Short interspersed elements (SINEs) comprise a significant portion of mammalian genomes and regulate gene expression through a variety of mechanisms. Here, we show that Myodonta clade-specific 4.5S RNAH (4.5SH), an abundant nuclear noncoding RNA that is highly homologous to the retrotransposon SINE B1, controls the expression of reporter gene that contains the antisense insertion of SINE B1 via nuclear retention. The depletion of endogenous 4.5SH with antisense oligonucleotides neutralizes the nuclear retention and changes the subcellular distribution of the reporter transcripts containing the antisense SINE B1 insertion. Importantly, endogenous transcripts with antisense SINE B1 were increased in the cytoplasm after knockdown of 4.5SH, leading to a decrease in cellular growth. We propose a tentative hypothesis that the amplification of the 4.5SH cluster in specific rodent species might delineate their evolutionary direction via the regulation of genes containing the antisense insertion of SINE B1.

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Citations

Apr 18, 2016·Gene·Karina A Tatosyan, Dmitri A Kramerov
May 30, 2020·International Journal of Molecular Sciences·Karina A TatosyanDmitri A Kramerov
Mar 24, 2017·Nucleic Acids Research·John KarijolichBritt Glaunsinger

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