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This is accomplished by using the naturally occurring process of RNAi. [6] This gene knockdown technique uses a double-stranded siRNA molecule that is synthesized with a sequence complementary to the gene of interest. The RNAi cascade begins once the Dicer enzyme starts to process siRNA. The end result of the process leads to degradation of ...
The other single-stranded RNA, named the passenger strand, is degraded during the RNA-induced silencing complex process. [7] Once the Argonaute is associated with the small RNA, the enzymatic activity conferred by the PIWI domain cleaves only the passenger strand of the small interfering RNA. RNA strand separation and incorporation into the ...
siRNAs act in the nucleus and the cytoplasm and are involved in RNAi as well as CDGS. [5] siRNAs come from long dsRNA precursors derived from a variety of single-stranded RNA (ssRNA) precursors, such as sense and antisense RNAs. siRNAs also come from hairpin RNAs derived from transcription of inverted repeat regions. siRNAs may also arise enzymatically from non-coding RNA precursors. [30]
DNA-directed RNA interference (ddRNAi) is a gene-silencing technique that utilizes DNA constructs to activate a cell's endogenous RNA interference (RNAi) pathways. DNA constructs are designed to express self-complementary double-stranded RNAs, typically short-hairpin RNAs (shRNA), that bring about the silencing of a target gene or genes once processed. [1]
RNAI is a non-coding RNA that is an antisense repressor of the replication of some E. coli plasmids, including ColE1. Plasmid replication is usually initiated by RNAII, [1] which acts as a primer by binding to its template DNA. The complementary RNAI binds RNAII prohibiting it from its initiation role.
RDE-1 (RNAi-DEfective 1) is a primary Argonaute protein required for RNA-mediated interference (RNAi) in Caenorhabditis elegans.The rde-1 gene locus was first characterized in C. elegans mutants resistant to RNAi, and is a member of a highly conserved Piwi gene family that includes plant, Drosophila, and vertebrate homologs.
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They are also used to detect the presence of double stranded RNA, presence of which could mean RNA interference. Northern blotting is a laboratory technique that produces similar information. It is slower and less quantitative, but also produces accurate information about the size of the target RNA. Nuclease protection assay products are ...