Format

Send to:

Choose Destination
See comment in PubMed Commons below
Cell Res. 2013 Jun;23(6):759-74. doi: 10.1038/cr.2013.37. Epub 2013 Mar 12.

The mitochondrial genome encodes abundant small noncoding RNAs.

Author information

  • 1Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, NV 89557, USA.

Abstract

Small noncoding RNAs identified thus far are all encoded by the nuclear genome. Here, we report that the murine and human mitochondrial genomes encode thousands of small noncoding RNAs, which are predominantly derived from the sense transcripts of the mitochondrial genes (host genes), and we termed these small RNAs mitochondrial genome-encoded small RNAs (mitosRNAs). DICER inactivation affected, but did not completely abolish mitosRNA production. MitosRNAs appear to be products of currently unidentified mitochondrial ribonucleases. Overexpression of mitosRNAs enhanced expression levels of their host genes in vitro, and dysregulated mitosRNA expression was generally associated with aberrant mitochondrial gene expression in vivo. Our data demonstrate that in addition to 37 known mitochondrial genes, the mammalian mitochondrial genome also encodes abundant mitosRNAs, which may play an important regulatory role in the control of mitochondrial gene expression in the cell.

PMID:
23478297
[PubMed - indexed for MEDLINE]
PMCID:
PMC3674384
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Nature Publishing Group Icon for PubMed Central
    Loading ...
    Write to the Help Desk