Small Cajal body specific RNA 6 | |
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Identifiers | |
Symbol | SCARNA6 |
Alt. Symbols | U88 |
Rfam | RF00478 |
Other data | |
RNA type | Gene; snRNA; snoRNA; scaRNA |
Domain(s) | Eukaryota |
GO | GO:0006396 GO:0005730 |
SO | SO:0000275 |
PDB structures | PDBe |
Small Cajal body specific RNA 6 (also known as SCARNA6 or U88) is a small nucleolar RNA found in Cajal bodies and believed to be involved in the pseudouridylation ( isomerisation of uridine to pseudouridine) of U5 spliceosomal RNA.
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]
U88 is found associated with both fibrillarin and Gar1p and co-localises with coilin in Cajal bodies. [1] It is an unusual guide RNA in that it is composed of both H/ACA box and a C/D box conserved domains. It is predicted to guide 2'-O-methylation of residue U41 of the U5 snRNA. [1]
U88 is also closely related to other human snoRNAs scaRNA U87 and a mouse homologue MBI-46. [2] In the human genome both U88 and U87 scaRNAs share the same host gene. [1] [3]