Small nucleolar RNA SNORA74

Small nucleolar RNA SNORA74
Predicted secondary structure and sequence conservation of SNORA74
Identifiers
Symbol	SNORA74
Alt. Symbols	U19
Rfam	RF00090
Other data
RNA type	Gene; snRNA; snoRNA; H/ACA-box
Domain(s)	Eukaryota
GO	0006396 0005730
SO	0000594

Small nucleolar RNA SNORA74 (U19) belongs to the H/ACA class of snoRNAs. snoRNAs bind a number of proteins (including dyskerin, Gar1p and Nop10p in the case of the H/ACA class) to form snoRNP complexes. This class is thought to guide the sites of modification of uridines to pseudouridines by forming direct base pairing interactions with substrate RNAs.^[1] Targets may include ribosomal and spliceosomal RNAs but the exact functions of many snoRNAs, including U19, are not confirmed. Co-precipitation of U19 snoRNA with RNase MRP RNA suggests that U19 may be involved in pre-rRNA processing.^[2][3]

References

1. Ganot, Philippe; Caizergues-Ferrer, Michèle; Kiss, Tamás (1 April 1997). "The family of box ACA small nucleolar RNAs is defined by an evolutionarily conserved secondary structure and ubiquitous sequence elements essential for RNA accumulation". Genes & Development 11 (7): 941–956. doi:10.1101/gad.11.7.941. PMID 9106664.
2. Kiss, T.; Bortolin, M. L.; Filipowicz, W. (April 1996). "Characterization of the intron-encoded U19 RNA, a new mammalian small nucleolar RNA that is not associated with fibrillarin". Molecular and Cellular Biology 16 (4): 1391–1400. PMC 231123. PMID 8657112.
3. Bortolin, M. L.; Kiss, T. (April 1998). "Human U19 intron-encoded snoRNA is processed from a long primary transcript that possesses little potential for protein coding". RNA 4 (4): 445–454. PMC 1369630. PMID 9630250.

External links

• Page for Small nucleolar RNA SNORA74 at Rfam