Small nucleolar RNA SNORD20

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Small nucleolar RNA SNORD20
RF00217.jpg
Identifiers
Symbol SNORD20
Alt. Symbols U20
Rfam RF00217
Other data
RNA type Gene; snRNA; snoRNA; C/D-box
Domain(s) Eukaryota
GO 0006396 0005730
SO 0000593
PDB structures PDBe

snoRNA U20 (also known as SNORD20) 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.

snoRNA U20 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]

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]

References[edit]

  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): 6663–6668. doi:10.1128/MCB.22.19.6663-6668.2002. PMC 134041Freely accessible. PMID 12215523. 
  2. ^ Nicoloso, M; Caizergues-Ferrer M; Michot B; Azum MC; Bachellerie JP (1994). "U20, a novel small nucleolar RNA, is encoded in an intron of the nucleolin gene in mammals". Mol Cell Biol. 14 (9): 5766–5776. doi:10.1128/mcb.14.9.5766. PMC 359102Freely accessible. PMID 8065311. 
  3. ^ Kiss-Laszlo, Z; Henry Y; Bachellerie JP; Caizergues-Ferrer M; Kiss T (1996). "Site-specific ribose methylation of preribosomal RNA: a novel function for small nucleolar RNAs". Cell. 85 (7): 1077–1088. doi:10.1016/S0092-8674(00)81308-2. PMID 8674114. 
  4. ^ Lestrade, Laurent; Weber, Michel J. (2006). "snoRNA-LBME-db, a comprehensive database of human H/ACA and C/D box snoRNAs". Nucleic Acids Research. 34 (Supplement 1: Database Issue): D158–D162. CiteSeerX 10.1.1.105.7552Freely accessible. doi:10.1093/nar/gkj002. PMC 1347365Freely accessible. PMID 16381836. 

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