Small nucleolar RNA R11/Z151

{{Infobox rfam

| Name = Small nucleolar RNA R11/Z151

| image = RF00349.jpg

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| caption = Predicted secondary structure and sequence conservation of snoR11

| Symbol = snoR11

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| Rfam = RF00349

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| RNA_type = Gene; snRNA; snoRNA; CD-box

| Tax_domain = Eukaryota

| GO = {{GO|0006396}} {{GO|0005730}}

| SO = {{SO|0000593}}

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In molecular biology, Small nucleolar RNA Z151 (homologous to R11) 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.

snoRNA Z151 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{{Cite journal | last1 = Galardi | first1 = S.| last2 = Fatica | first2 = A.| last3 = Bachi | first3 = A.| last4 = Scaloni | first4 = A.| last5 = Presutti | first5 = C.| last6 = Bozzoni | first6 = I.| doi = 10.1128/MCB.22.19.6663-6668.2002 | title = Purified Box C/D snoRNPs Are Able to Reproduce Site-Specific 2'-O-Methylation of Target RNA in Vitro | journal = Molecular and Cellular Biology| volume = 22 | issue = 19 | pages = 6663–6668 | date=October 2002 | pmid = 12215523| pmc = 134041}}

Plant snoRNA Z151 was identified in screens of Oryza sativa

{{cite journal |vauthors=Chen CL, Liang D, Zhou H, Zhuo M, Chen YQ, Qu LH | title = The high diversity of snoRNAs in plants: identification and comparative study of 120 snoRNA genes from Oryza sativa | journal = Nucleic Acids Res. | volume = 31 | issue = 10 | pages = 2601–13 | year = 2003 | pmid = 12736310 | doi = 10.1093/nar/gkg373 | pmc = 156054 }} and Arabidopsis thaliana.{{cite journal |vauthors=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}}