Small Cajal body specific RNA 8

Small Cajal body specific RNA 8 (also known as SCARNA8 or U92) is a small nucleolar RNA found in Cajal bodies and believed to be involved in the pseudouridylation (isomerisation of uridine to pseudouridine) of U2 spliceosomal RNA.

Small Cajal body specific RNA 8
Predicted secondary structure and sequence conservation of SCARNA8
Identifiers
SymbolSCARNA8
Alt. SymbolsU92
RfamRF00286
Other data
RNA typeGene; snRNA; snoRNA; scaRNA
Domain(s)Eukaryota
GO0006396 0015030 0005730
SO0000275
PDB structuresPDBe

scaRNAs are a specific class of small nucleolar RNAs that localise to the Cajal bodies and guide the modification of RNA polymerase II transcribed spliceosomal RNAs U1, U2, U4, U5 and U12.[1]

U92 belong to the H/ACA box class of guide RNAs as it has the predicted hairpin-hinge-hairpin-tail structure, conserved H/ACA-box motifs and is found associated with GAR1.[1] It is predicted to guide the pseudouridylation of residues U44 in U2 snRNA.[1] This snoRNA is related to the mouse H/ACA box snoRNA MBI-57.[2]

References

  1. Darzacq X, Jády BE, Verheggen C, Kiss AM, Bertrand E, Kiss T (June 2002). "Cajal body-specific small nuclear RNAs: a novel class of 2'-O-methylation and pseudouridylation guide RNAs". The EMBO Journal. 21 (11): 2746–56. doi:10.1093/emboj/21.11.2746. PMC 126017. PMID 12032087.
  2. 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.
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