Small nucleolar RNA SNORD50

snoRNA U5o (also known as SNORD50) 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 U50 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] cite journal | last = Kiss-Laszlo | first = Z | coauthors = Henry Y, Bachellerie JP, Caizergues-Ferrer M, Kiss T | year = 1996 | title = Site-specific ribose methylation of preribosomal RNA: a novel function for small nucleolar RNAs | journal = Cell | volume = 85 | pages = 1077–1088 | pmid = 8674114 | doi = 10.1016/S0092-8674(00)81308-2 ] .

U50 is an intronic snoRNA gene located on chromosome 6q15, at the breakpoint of chromosomal translocation t(3;6)(q27;q15). The U50HG gene is composed of six exons, whose spliced transcripts have little potential for coding a protein, and its introns produce both U50 and U50-like (U50') snoRNAs that are localised in nucleoli cite journal | last = Tanaka | first = R | coauthors = Satoh H, Moriyama M, Satoh K, Morishita Y, Yoshida S, Watanabe T, Nakamura Y, Mori S | year = 2000 | title = Intronic U50 small-nucleolar-RNA (snoRNA) host gene of no protein-coding potential is mapped at the chromosome breakpoint t(3;6)(q27;q15) of human B-cell lymphoma | journal = Genes Cells | volume = 5 | pages = 277–287 | pmid = 10792466 | doi = 10.1046/j.1365-2443.2000.00325.x] .

References

External links

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* [http://www-snorna.biotoul.fr/plus.php?id=U50 snoRNABase entry for SNORD50]
* [http://www-snorna.biotoul.fr/plus.php?id=U50B snoRNABase entry for SNORD50B]