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2'-O-methylation (2'-O-Me) is a common nucleotide epitranscriptomics modification of ribosomal RNA (rRNA). The rRNA is transcribed from DNA and then used to create proteins through translation. [1] The resulting protein would normally be solely dependent on the gene it was translated from, but the methylation of the RNA would influence the ...
The example below depicts the acetalisation reaction of D-ribose 1. With acetone or 2,2-dimethoxypropane as the acetalisation reagent the reaction is under thermodynamic reaction control and results in the pentose 2. The latter reagent in itself is an acetal and therefore the reaction is actually a cross-acetalisation.
In the patented formation of 1-O-acetyl-2,3,5-tri-O-benzoyl-β-L-ribofuranose, a reactor containing thionyl chloride (5 ml) and methyl alcohol (100 ml) is stirred at 0–5 °C for 10 to 15 minutes. After this period, 10 g (ratio-wise) of ribose is added to the flask. The flask is then stirred and maintained at its temperature for 8 hours.
An unusual guide snoRNA U85 that functions in both 2′-O-ribose methylation and pseudouridylation of small nuclear RNA (snRNA) U5 has been identified. [14] This composite snoRNA contains both C/D and H/ACA box domains and associates with the proteins specific to each class of snoRNA (fibrillarin and Gar1p, respectively).
The template for methylation consists of 10-21 nucleotides. [38] 2'-O-methylation of the ribose sugar is one of the most common rRNA modifications. [40] Methylation is primarily introduced by small nucleolar RNA's, referred to as snoRNPs. There are two classes of snoRNPs that target methylation sites, and they are referred to box C/D and box H/ACA.
Most of the members of the box C/D family function in directing site-specific 2'-O-methylation of substrate RNAs. [1] This snoRNA was originally cloned from HeLa cells and expression verified by northern blotting. [2] It is predicted to guide 2'O-ribose methylation of ribosomal RNA (rRNA) 28S at residue C3866.
Most of the members of the C/D box family function in directing site-specific 2'-O-methylation of substrate RNAs. [1] SNORD100 is predicted to guide the 2'O-ribose methylation of 18S ribosomal RNA (rRNA) at residue G436.
Most of the members of the box C/D family function in directing site-specific 2'-O-methylation of substrate RNAs. [1] U20 is encoded in intron 11 of the nucleolin gene in human, mouse and rat. [2] It is predicted to guide the 2'O-ribose methylation of 18S ribosomal RNA (rRNA) residue U1804. [3] [4]