Therefore, the data presented here suggest that structural modification of functional portions of an siRNA duplex by base substitution could greatly influence allele discrimination and gene silencing, thereby contributing to enhancement of ASP-RNAi.
Indeed BASP1 contains a bipartite NLS (nuclear localization sequence), sites of SUMO (small ubiquitin-related modifier -modification, and a portion of BASP1 localizes to Pmodifier -modificationandia) bodies within the nucleus [ 13].
Based on the findings, a modification of the lower portion of the ¯¯¯¯¯Bo ¯¯¯¯¯¯Md phase stability diagram is proposed.
The distinctive regional patterns seen in the rodent prostate and the histological heterogeneity of the human adult gland all point to the modification of the distal portion of the ducts, while the proximal segments retain their spatial relationship to the urethra that was formed during fetal development.
Modifications at the pantoyl portion are limited to the addition of an ω-methyl group.
Modifications to the pyridazinone portion of the core and linker led to the identification of molecules with excellent target potency and selectivity with improved rat pharmacokinetic properties and reduced potential hERG liabilities.
Therefore, structural modification of such functional portions of siRNA duplexes may greatly influence allele discrimination and gene silencing activity, thereby conferring improvement of ASP-RNAi.
Translational efficiency may also be influenced by modifications in the noncoding portion of the genes.
Furthermore, we interrogated modifications in the peptide portion, where it is known that lack of N-methylation of isoleucine reduces activity (apratoxin B) and replacement of proline by N-methyl alanine largely retains activity (1a, apratoxin F).
If the modifications occur in a portion of the molecule that is critical to its solution properties, the seemingly small compromises made to produce the recombinant peptide could have unintended consequences.
