Long noncoding RNAs are generated from the mitochondrial genome and regulated by nuclear-encoded proteins
- 25 October 2011
- journal article
- Published by Cold Spring Harbor Laboratory in RNA
- Vol. 17 (12), 2085-2093
- https://doi.org/10.1261/rna.029405.111
Abstract
Human mitochondrial long noncoding RNAs (lncRNAs) have not been described to date. By analysis of deep-sequencing data we have identified three lncRNAs generated from the mitochondrial genome and confirmed their expression by Northern blotting and strand-specific qRT–PCR. We show that the abundance of these lncRNAs is comparable to their complementary mRNAs and that nuclear-encoded mitochondrial proteins involved in RNA processing regulate their expression. We also identify the 5′ and 3′ transcript ends of the three lncRNAs and show that mitochondrial RNase P protein 1 (MRPP1) is important for the processing of these transcripts. Finally, we show that mitochondrial lncRNAs form intermolecular duplexes and that their abundance is cell- and tissue-specific, suggesting a functional role in the regulation of mitochondrial gene expression.Keywords
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