Prp43 may destabilize base-pairings of U6/5′ splice site or U2/U6 by unwinding RNA duplex or by displacing proteins binding to specific RNA structures, which then triggers disruption of other RNA duplexes.
Several parameters control the mRNA turnover: RNA-binding proteins (RBPs) that bind to specific RNA sequences and either increase or decrease the transcript half-life (Brennan and Steitz, 2001; Gorospe, 2003;); regions located in the 3′-untranslated regions (3′-UTRs) of mRNA.
miRNAs are a class of small noncoding RNA molecules that modulate gene expression by binding to specific target messenger RNAs to prevent their translation and/or to promote degradation.
Since library construction was based on peptides previously selected for binding and selectivity to specific RNAs, the number of target-specific clones increased dramatically following in vitro maturation.
These molecules, which are evolutionarily conserved, regulate gene expression by binding to specific sequences within the messenger RNAs and reducing their stability or preventing them from being translated into proteins.
Although additional mechanisms have been reported, in vertebrates miRs regulate gene expression mainly at the post-transcriptional level, by inhibiting translation of target messenger RNAs by binding to specific, imperfectly complementary, target sites [ 16- 18].
Phage rescued from these clones were tested for binding to the specific RNA target and an irrelevant RNA target.
SNF contains two RNA recognition motifs (RRMs), the first of which is responsible for specific binding to both RNAs.
They can inhibit the translation or strengthen the degradation of target transcripts through specific binding to messenger RNAs [ 9].
MicroRNAs (miRNAs) are small RNA molecules, typically between 19 and 22 nucleotides in length, that regulate protein-coding genes through sequence-specific binding to messenger RNAs (mRNAs).
