Duplex StabilizationEpigenetics/DNA Methylation
Serinol COT-Serinol Dabcyl Biotin Fluorescein Rhodamine Cyanine Elitechgroup Dyes and Quencher Black Hole Quencher Blackberry Rhodamine (TAMRA) Acridine DNP Cholesterol Tocopherol Stearyl Psoralen EDTA Ferrocene Methylene Blue Metal Chelates Polyaromic Hydrocarbons Puromycin Quenched Autoligation (QUAL) Probes Photo Regulation
RNA Supports For 3'-Modification TOM-Protected RNA Amidites RNA Supports For TOM RNA Synthesis TBDMS-Protected RNA Amidites HT RNA Amidites UltraMild TBDMS RNA Amidites TBDMS RNA Supports UltraMild Solvents/Reagents Minor RNA Amidites (TOM) RNA Sequence Modifier (TOM-Protected) Minor RNA Amidites (TBDMS-Protected) Minor RNA Triphosphates 2'-OMe-RNA Amidites 2'-OMe-Supports HT 2'-OMe-RNA Amidites Ultramild 2'-OME-RNA Minor 2'-OMe-RNA Amidites 2'-OMe-Thiophosphoramidites 2'-F-RNA Monomers 2'-F-Arabinonucleic Acid (2'-F-ANA)
2’-OMe-RNA-PACE Phosphoramidites (Catalog as PDF)
2’-OMe-RNA-PACE PhosphoramiditesPACE modifications have enjoyed a resurgence in interest as applied to the field of CRISPR gene editing. In an initial publication, it was shown that single guide RNAs (sgRNA) provided significantly higher activity in cells when 2'-O-methylthiophosphonoacetates were incorporated on the ends of the guide RNA to protect against cellular nucleases.1 In subsequent studies, 2'-OMe PACE modified sgRNAs were also shown to significantly increase on-target specificity of the CRISPR-Cas9 DNA cleavage in eukaryotic cells. In a recent paper, the incorporation of 2'-OMe PACE modified nucleotides in the 20-nucleotide guide region of the sgRNA was shown to decrease off-target cutting by over an order of magnitude while in most cases increasing the overall on-target efficiency as compared to unmodified single guide RNA.2
As an optimal cycle, we recommend using DCI as an activator (30-3150-XX) and a 15 minute coupling time. Following coupling, cap using Unicap with a regular coupling time and then oxidize using 0.5 M CSO for 3 minutes. Alternatively, a 33 minute coupling time using 0.45 M tetrazole, oxidation using low-water iodine (40-4032-XX) followed by capping with 6.5% DMAP as Cap B will give acceptable results. For deprotection, pre-treat the synthesis column with 1.5% DBU in anhydrous acetonitrile for 60 minutes at room temperature to remove 1,1-dimethyl-2-cyanoethyl protecting groups. Rinse the column with ACN, dry under argon and complete deprotection with 40% Methylamine for 2 hours at room temperature.