To better understand the diversity of small silencing RNAs expressed in plants, we employed
high-throughput pyrosequencing to obtain 887,000 reads corresponding to Arabidopsis …

Posttranscriptional gene silencing (PTGS) in plants results from the degradation of mRNAs
and shows phenomenological similarities with quelling in fungi and RNAi in animals. Here, …

MicroRNAs (miRNAs) are endogenous 21–24-nt RNAs that can down-regulate gene
expression by pairing to the messages of protein-coding genes to specify mRNA cleavage or …

Using grafting procedures, we investigated the transmission of co-suppression of nitrate
reductase and nitrite reductase host genes and transgenes and of post-transcriptional silencing …

Here we describe a set of endogenous short interfering RNAs (siRNAs) in Arabidopsis, some
of which direct the cleavage of endogenous mRNAs. These siRNAs correspond to both …

Small RNAs are riboregulators that have critical roles in most eukaryotes. They repress
gene expression by acting either on DNA to guide sequence elimination and chromatin …

MicroRNAs (miRNAs) and short interfering RNAs (siRNAs), 20- to 27-nt in length, are essential
regulatory molecules that act as sequence-specific guides in several processes in most …

RNA silencing is a remarkable type of gene regulation based on sequence-specific targeting
and degradation of RNA. The term encompasses related pathways found in a broad range …

In mammalian cells, the nuclear export receptor, Exportin 5 (Exp5), exports pre-microRNAs (pre-miRNAs)
as well as tRNAs into the cytoplasm. In this study, we examined the function of …

ARGONAUTE (AGO) proteins are integral players in all known small RNA-directed regulatory
pathways. Eukaryotes produce numerous types of small RNAs, such as microRNAs (…