MeSH definition : A class of small RNAs that are 24–31 nucleotides in length. They associate with
the PIWI SUBFAMILY OF ARGONAUTE PROTEINS to form effector complexes known as piRNA-induced
silencing complexes, which repress transposons via transcriptional or posttranscriptional
mechanisms and maintain germline genome integrity. In addition to their role in transposon
silencing, piRNAs in diverse organisms function in the regulation of cellular genes.;
A class of small RNAs that are 24–31 nucleotides in length. They associate with
the PIWI SUBFAMILY OF ARGONAUTE PROTEINS to form effector complexes known as piRNA-induced
silencing complexes, which repress transposons via transcriptional or posttranscriptional
mechanisms and maintain germline genome integrity. In addition to their role in transposon
silencing, piRNAs in diverse organisms function in the regulation of cellular genes.