sno(s)RNA-containing ribonucleoprotein complex https://github.com/geneontology/go-ontology/issues/20416 sRNP small nucleolar ribonucleoprotein complex small ribonucleoprotein protein complex A ribonucleoprotein complex that contains an RNA molecule of the snoRNA family and associated proteins. Many are involved in a step of processing of rRNA molecules: cleavage, 2'-O-methylation, or pseudouridylation, but other RNA types can be targets as well. The majority fall into one of two classes, box C/D type or box H/ACA type, which are conserved across eukaryotes and archaea. Other members include the telomerase RNA and the ribonuclease MRP RNA. GO:0005732 cellular_component Note that 'nucleolar' in the name acronym 'snoRNA' is part of the RNA family designation 'small nucleolar', and does not reflect the location of the complex. Both box C/D type and box H/ACA RNAs are found in Archaea (where they are referred to as sRNAs) as well as in Eukaryota. In eukaryotes, box H/ACA RNAs are found in both nucleolar-localized snoRNP complexes and in Cajal body-localized scaRNP complexes. snoRNP small nucleolar ribonucleoprotein small ribonucleoprotein ribonucleoprotein complex