Small nucleolar RNA SNORD16

snoRNA U16 (also known as SNORD16) is a non-coding RNA (ncRNA) molecule which functions in the modification of other small nuclear RNAs (snRNAs). This type of modifying 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.

Small nucleolar RNA SNORD16
Predicted secondary structure and sequence conservation of SNORD16
Identifiers
SymbolSNORD16
Alt. SymbolsU16
RfamRF00138
Other data
RNA typeGene; snRNA; snoRNA; C/D-box
Domain(s)Eukaryota
GO0006396 0005730
SO0000593
PDB structuresPDBe

snoRNA U16 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.[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 in mouse.[4]

References
  1. Galardi S, Fatica A, Bachi A, Scaloni A, Presutti C, Bozzoni I (October 2002). "Purified box C/D snoRNPs are able to reproduce site-specific 2'-O-methylation of target RNA in vitro". Molecular and Cellular Biology. 22 (19): 6663–8. doi:10.1128/MCB.22.19.6663-6668.2002. PMC 134041. PMID 12215523.
  2. Kiss-László Z, Henry Y, Bachellerie JP, Caizergues-Ferrer M, Kiss T (June 1996). "Site-specific ribose methylation of preribosomal RNA: a novel function for small nucleolar RNAs". Cell. 85 (7): 1077–88. doi:10.1016/S0092-8674(00)81308-2. PMID 8674114.
  3. Fragapane P, Prislei S, Michienzi A, Caffarelli E, Bozzoni I (July 1993). "A novel small nucleolar RNA (U16) is encoded inside a ribosomal protein intron and originates by processing of the pre-mRNA". The EMBO Journal. 12 (7): 2921–8. PMC 413545. PMID 8335006.
  4. Hüttenhofer A, Kiefmann M, Meier-Ewert S, O'Brien J, Lehrach H, Bachellerie JP, Brosius J (June 2001). "RNomics: an experimental approach that identifies 201 candidates for novel, small, non-messenger RNAs in mouse". The EMBO Journal. 20 (11): 2943–53. doi:10.1093/emboj/20.11.2943. PMC 125495. PMID 11387227.
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