Small nucleolar RNA SNORD82

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Small nucleolar RNA SNORD82
Symbol SNORD82
Alt. Symbols U82
Rfam RF00158
Other data
RNA type Gene; snRNA; snoRNA; C/D-box
Domain(s) Eukaryota
GO 0006396 0005730
SO 0000593
PDB structures PDBe

snoRNA U82 (also known as SNORD82 or Z25) 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 U82/Z25 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]

snoRNA U82 has been identified in both humans and mice:[2] it is located in the fifth intron of the nucleolin gene in both species. Two additional snoRNAs (C/D box snoRNA U20 and the H/ACA snoRNA U23 ) are also encoded within the introns of the nucleolin gene.[3]

U82 is predicted to guide the 2'O-ribose methylation of 18S ribosomal RNA (rRNA) residue A1678.[3]

Another, different snoRNA, named U82 has been predicted in the introns of L3 ribosomal protein gene (RPL3) in humans and cows.[4] However, the expression of this snoRNA could not be confirmed by northern blotting or Reverse transcription polymerase chain reaction (RT-PCR) and it should not be confused with this snoRNA located in the nucleolin gene.


  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. ^ Rebane, Ana; Metspalu, Andres (1999). "U82, a novel snoRNA identified from the fifth intron of human and mouse nucleolin gene". Biochimica et Biophysica Acta. 1446 (3): 426–30. doi:10.1016/S0167-4781(99)00093-7. PMID 10524220. 
  3. ^ a b 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 accessible. doi:10.1093/nar/gkj002. PMC 1347365Freely accessible. PMID 16381836. 
  4. ^ Duga, S.; Asselta, R.; Malcovati, M.; Tenchini, M. L.; Ronchi, S.; Simonic, T. (February 2000). "The intron-containing L3 ribosomal protein gene (RPL3): Sequence analysis and identification of U43 and of two novel intronic small nucleolar RNAs". BBA − Gene Structure and Expression. 1490 (3): 225–236. doi:10.1016/S0167-4781(99)00237-7. PMID 10684968. 

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