DNA Oligonucleotide Synthesis | Sigma-Aldrich

 Induced cross-linking reactions to target genes using modified oligonucleotides

Oligonucleotide synthesis - YouTube

Glen Research is delighted to introduce a GalNAc modification strategy using a monomeric GalNAc support and the equivalent GalNAc phosphoramidite. Our experimental work has shown that these products are fully compatible with regular oligonucleotide synthesis and deprotection. Oligonucleotides containing GalNAc can be deprotected using standard procedures during which the acetyl protecting groups on the GalNAc group are removed. Glen Research offers these GalNAc C3 products under an agreement with AM Chemicals LLC.

Formation of N-branched oligonucleotides as by-products in solid-phase oligonucleotide synthesis

Solid-phase oligonucleotide synthesis - ATDBio

With the advent of gene synthesis and the requirement of longer oligonucleotides for mutagenesis, we thought it would be useful to our customers to review the chemistry of synthesizing long oligonucleotides (>75 nucleotides) and to provide some suggestions for their successful production.

This article by Eugene Lukhtanov of ELITechGroup Molecular Diagnostics introduces the tripeptide of dihydropyrroloindole-carboxylate (CDPI3), which is a minor groove binding (MGB) moiety derived from the natural product CC-1065 and exhibits strong DNA binding properties. Synthetic oligonucleotides with covalently-attached CDPI3 moieties have enhanced DNA affinity and have improved the hybridization properties of sequence-specific DNA probes. Short CDPI3-oligonucleotides hybridize with single-stranded DNA to give more stable DNA duplexes than unmodified oligonucleotides of similar length. The author describes the general properties of CDPI3 MGB-oligonucleotide conjugates in detail, along with some specific applications:

Oligonucleotide Synthesis - Science Exchange

In this article, we introduce 5'-CDPI3 MGB™ Phosphoramidite and 3'-CDPI3 MGB™ CPG. Specific instructions are provided for the use of these products and the procedures are illustrated using HPLC and MS data. Details of a melting study using a CDPI3 MGB-oligonucleotide conjugate are presented.

FDA-Approved Oligonucleotide Therapies in 2017: …

The authors note that the detailed studies of the molecular mechanisms of DNA repair pathways were made possible by using site-specifically modified oligonucleotides and that the availability of phosphoramidites to synthesize oligonucleotides with DNA lesions has contributed to the field. They illustrate the article using primarily structural studies in the following examples:

The Chemical Synthesis of Oligonucleotides

Phosphoramidites that allow the generation of oligonucleotides containing site-specific lesions have been vital components for studying the mechanism of DNA repair. New DNA lesions are still being discovered and the study of their biological consequences will require their site-specific incorporation into oligonucleotides. The authors conclude that the increased availability of phosphoramidites for the synthesis of lesion-containing oligonucleotides should facilitate many future discoveries in the broad area of DNA damage and repair.

Global Oligonucleotide Synthesis Market: Type, …

The use of a sulfurizing reagent during the regular synthesis cycle using phosphoramidite chemistry has revolutionized the production of phosphorothioate oligonucleotide analogues. Undoubtedly, this ease of preparation of phosphorothioates has made this oligonucleotide modification by far the most common in research. Glen Research was one of the first sources of the sulfurizing reagent, 3H-1,2-benzodithiol-3-one 1,1-dioxide, popularly known as Beaucage Reagent (1).1 This sulfurizing reagent has found common use in the face of a plethora of rival reagents over the years because of its high efficiency, fast reaction time, and widespread availability. The one mild flaw we have found with Beaucage Reagent is that, although it is quite stable in acetonitrile solution in a silanized amber bottle, it is has relatively poor stability in solution once installed on the DNA synthesizer. Consequently, we have not been able to supply a sulfurizing solution, preferring to supply the powdered reagent along with an appropriate silanized bottle. The customer then weighs an appropriate amount of reagent into the silanized bottle and adds acetonitrile at a concentration of 1g/100mL. Over the years, we have considered other sulfurizing reagents but we were not able to find another reagent that exhibits the same fast sulfurization kinetics along with improved stability on the synthesizer. RNA Sulfurization