Small nucleolar RNA SNORD66

In molecular biology, SNORD66 (also known as HBII-142) 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 SNORD66
Predicted secondary structure and sequence conservation of SNORD66
Identifiers
SymbolSNORD66
Alt. SymbolssnoHBII-142
RfamRF00572
Other data
RNA typeGene; snRNA; snoRNA; C/D-box
Domain(s)Eukaryota
GOGO:0006396 GO:0005730
SOSO:0000593
PDB structuresPDBe

HBII-142 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]

HBII-142 is the human orthologue of the mouse MBII-142 snoRNA[2] and is predicted to guide 2'O-ribose methylation of 18S ribosomal RNA (rRNA) at residue C1272.[3]

An experiment that looked at 22 different non-small-cell lung cancer tissues found that SNORD33, SNORD66 and SNORD76 were over-expressed relative to matched noncancerous lung tissues.[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. 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.
  3. Lestrade L, Weber MJ (January 2006). "snoRNA-LBME-db, a comprehensive database of human H/ACA and C/D box snoRNAs". Nucleic Acids Research. 34 (Database issue): D158-62. CiteSeerX 10.1.1.105.7552. doi:10.1093/nar/gkj002. PMC 1347365. PMID 16381836.
  4. Liao J, Yu L, Mei Y, Guarnera M, Shen J, Li R, Liu Z, Jiang F (July 2010). "Small nucleolar RNA signatures as biomarkers for non-small-cell lung cancer". Molecular Cancer. 9: 198. doi:10.1186/1476-4598-9-198. PMC 2919450. PMID 20663213.
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