Small nucleolar RNA Me18S-Um1356

Small nucleolar RNA Me18S-Um1356 is a non-coding RNA (ncRNA) molecule which functions in the modification of other small nuclear RNAs (snRNAs). This type of modifiying RNA is usually located in the nucleolus of the eukaryotic cell which is a major site of snRNA biogenesis. It is known as a small nucleolar RNA (snoRNA) and also often referred to as a guide RNA.snoRNA Me18S-Um1356 belongs to the C/D box class of snoRNAs which contain the conserved sequence motifs known as the C box (UGAUGA) and the D box (CUGA). Most of the members of the box C/D family function in directing site-specific 2'-O-methylation of substrate RNAs [cite journal | last = Galardi | first = S | coauthors = Fatica A, Bachi A, Scaloni A, Presutti C, Bozzoni I | year = 2002 | title = Purified box C/D snoRNPs are able to reproduce site-specific 2'-O-methylation of target RNA in vitro | journal = Mol Cell Biol | volume = 22 | pages = 6663–6668 | pmid = 12215523 | doi = 10.1128/MCB.22.19.6663-6668.2002] . It is predicted that this family directs 2'-O-methylation of 18S U-1356 [cite journal | last = Huang | first = ZP | coauthors = Zhou H, He HL, Chen CL, Liang D, Qu LH | year = 2005 | title = Genome-wide analyses of two families of snoRNA genes from Drosophila melanogaster, demonstrating the extensive utilization of introns for coding of snoRNAs | journal = RNA. | volume = 11 | pages = 1303–1316 | pmid = 15987805 | doi = 10.1261/rna.2380905] .

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