Small temporal RNA (abbreviatedstRNA) regulates gene expression duringroundworm development by preventing themRNAs they bind from being translated.[1] In contrast tosiRNA, stRNAs downregulate expression of target RNAs after translation initiation without affectingmRNA stability.[2] Nowadays, stRNAs are better known asmiRNAs.
stRNAs exert negative post-transcriptional regulation by binding to complementary sequences in the 3' untranslated regions of their target genes. stRNAs are transcribed as longer precursor RNAs that are processed by the RNaseDicer/DCR-1 and members of theRDE-1/AGO1family of proteins, which are better known for their roles inRNA interference (RNAi). stRNAs may function to control temporal identity during development inC. elegans and other organisms.[3]
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