PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 9383579

Efficient process technologies for the preparation of oligonucleotides.

W Pieken
View original source ↗Export metadata ↓

Abstract

Efficient process technologies for the preparation of 2'-substituted nucleoside monomers, as well as for oligonucleotide preparation, are introduced. A novel method for efficient preparation of 2'-substituted uridines is presented. This method employs the 3'-hydroxyl group of 2,2'-anhydrouridine as a tether for the facile intramolecular introduction of nucleophiles to the 2'-position. It allows access to 2'-alkoxy substituents from their alcohol precursors and to substituted 2'-amino substituents, such as the novel O-substituted 2'-hydroxylaminouridines. A novel process for large-scale oligonucleotide synthesis is discussed, which allows solution phase coupling of the monomer to the growing oligonucleotide chain. This is followed by selective isolation of productive coupling product by anchoring to a resin. Release from this resin completes a coupling cycle.

Explore related subjects

OligonucleotidesOligonucleotides, AntisenseJournal ArticleReview

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

W Pieken. 1997. Efficient process technologies for the preparation of oligonucleotides.. https://doi.org/10.1002/9780470515396.ch16

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed2026

Mapping subcellular microenvironments using oligonucleotide-directed proximity labeling.

Understanding how cells compartmentalize their biomolecules into discrete structures remains one of the fundamental goals of cell biology. The proliferation of proximity labeling (PL) technologies has been invaluable toward this goal, enabling biochemical "dissection" of compartments that would be intractable to classical biochemical methods. While robust PL approaches have long been established for targeting proteins of interest, targeting nucleic acids-RNAs and genomic loci-has remained significantly more challenging. Here, we review recent advancements in the field that overcome this longstanding roadblock by using programmable DNA oligonucleotides to direct PL enzyme localization. These tools are already revealing new insights into the molecular architecture of cellular compartments that lie at the heart of gene expression. They also provide a foundation for developing a new generation of PL tools that exploit the modularity and programmability of oligonucleotide-based devices to enable precise spatiotemporal control at previously inaccessible targets and in challenging specimen types.

Oligonucleotides↗
PubMed2006

Excimer-based peptide beacons: a convenient experimental approach for monitoring polypeptide-protein and polypeptide-oligonucleotide interactions.

While protein-polypeptide and nucleic acid-polypeptide interactions are of significant experimental interest, quantitative methods for the characterization of such interactions are often cumbersome. Here we described a relatively simple means of optically monitoring such interactions using excimer-based peptide beacons (PBs). The design of PBs is based on the observation that, whereas short peptides are almost invariably unfolded and highly dynamic, they become rigid when complexed with macromolecular targets. Using this binding-induced folding to segregate two pyrene moieties and therefore inhibit excimer formation, we have produced PBs directed against both anti-HIV antibodies and the retroviral transactive response (TAR) RNA hairpin. For both polypeptides, target recognition is accompanied by a roughly 2-fold decrease in excimer emission, thus allowing the detection of their respective targets at concentrations of a few nanomolar. Because excimer emission requires the formation of a tight, precisely oriented pyrene dimer, even relatively trivial binding-induced segregation reduces fluorescence significantly. This suggests that the PB approach will be suitable for monitoring a wide range of peptide-macromolecule recognition events. Moreover, the synthesis of excimer-based PBs utilizes commercially available modified pyrenes in a simple and well-established protocol, making the approach well suited for routine laboratory applications.

Oligonucleotides↗
PubMed2006

Building oligonucleotide therapeutics using non-natural chemistries.

Modified nucleotides are increasingly being utilized in all categories of therapeutic oligonucleotides to increase nuclease-resistance, target affinity and specificity. The extent to which these substitutions are tolerated varies with the different modes of action exploited by various modalities, but fully modified oligonucleotides have now been discovered for most types of therapeutic oligonucleotide. Fully phosphorothioate-substituted antisense oligonucleotides have been used for several years. The first fully modified siRNA was reported in 2006 with a 2'-O-methyl sense strand and a phosphorothioate antisense strand. The first fully modified aptamer (2'-O-methyl) was reported in 2005. It is expected that future candidate therapeutic oligonucleotides will have even more drug-like characteristics as a result of the inclusion of modified nucleotides.

Oligonucleotides↗