Small nucleolar RNA snoR9 plant

snoR9 is a non-coding RNA (ncRNA) which functions in the biogenesis (modification) of other small nuclear RNAs (snRNAs). It is known as a small nucleolar RNA (snoRNA) and also often referred to as a 'guide RNA'.

R9 is a member of 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 cite journal | author = Galardi S, Fatica A, Bachi A, Scaloni A, Presutti C, Bozzoni I | title = Purified box C/D snoRNPs are able to reproduce site-specific 2'-O-methylation of target RNA in vitro | journal = Mol. Cell. Biol. | volume = 22 | issue = 19 | pages = 6663–8 | year = 2002 | pmid = 12215523 | doi = | issn = ] .

This plant snoRNA was identified in "Arabidopsis thaliana" by computational screening and experimentally verified by primer extension analysiscite journal | author = Barneche F, Gaspin C, Guyot R, Echeverría M | title = Identification of 66 box C/D snoRNAs in Arabidopsis thaliana: extensive gene duplications generated multiple isoforms predicting new ribosomal RNA 2'-O-methylation sites | journal = J. Mol. Biol. | volume = 311 | issue = 1 | pages = 57–73 | year = 2001 | pmid = 11469857 | doi = 10.1006/jmbi.2001.4851 | issn = ] This snoRNA is not related to the snoRNA identified in hyperthermophiles also called snoR9.

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