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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 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.
This snoRNA is the human orthologue of mouse snoRNA MBII-336. [2] SNORD93 is predicted to guide the 2'O-ribose methylation of 18S ribosomal RNA (rRNA) residue A576. [ 3 ] Additionally, SNORD93 can be processed into a smaller, microRNA-like fragment (termed snoRNA-derived RNA(sdRNA)) that contributes to the malignant phenotype of breast cancer ...
Ribosomes are the macromolecular machines that are responsible for mRNA translation into proteins. The eukaryotic ribosome, also called the 80S ribosome, is made up of two subunits – the large 60S subunit (which contains the 25S [in plants] or 28S [in mammals], 5.8S, and 5S rRNA and 46 ribosomal proteins) and a small 40S subunit (which contains the 18S rRNA and 33 ribosomal proteins). [6]
Most of the members of the box C/D family function in directing site-specific 2'-O-methylation of substrate RNAs. [1] U16 is predicted to guide the 2'O-ribose methylation of 18S ribosomal RNA (rRNA) residue A484 [2] and is encoded within an intron of the gene for ribosomal proteins L1 in animals. [3] This snoRNA was independently named MBII-98 ...
Most of the members of the box C/D family function in directing site-specific 2'-O-methylation of substrate RNAs. [ 1 ] U102 was identified by computational screening of the introns of ribosomal protein genes for conserved C/D box sequence motifs and expression experimentally verified by northern blotting . [ 2 ]
U46 is encoded in intron 2 of the ribosomal protein S8 gene in human, and is hypothesised to guide methylation of 2'-O-ribose residues on 28S ribosomal RNA (rRNA). [2] [3] The homologue of this snoRNA in Arabidopsis thaliana is called snoZ153. [4] Some human U40 sequences have been annotated in the sequence databases (Genbank) as U46.