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Mitochondrial noncoding RNAs: new wine in an old bottle
RNA Biology  (IF4.652),  Pub Date : 2021-06-10, DOI: 10.1080/15476286.2021.1935572
Huixin Liang, Jiayu Liu, Shicheng Su, Qiyi Zhao

ABSTRACT

Mitochondrial noncoding RNAs (mt-ncRNAs) include noncoding RNAs inside the mitochondria that are transcribed from the mitochondrial genome or nuclear genome, and noncoding RNAs transcribed from the mitochondrial genome that are transported to the cytosol or nucleus. Recent findings have revealed that mt-ncRNAs play important roles in not only mitochondrial functions, but also other cellular activities. This review proposes a classification of mt-ncRNAs and outlines the emerging understanding of mitochondrial circular RNAs (mt-circRNAs), mitochondrial microRNAs (mitomiRs), and mitochondrial long noncoding RNAs (mt-lncRNAs), with an emphasis on their identification and functions.