SO:0000593 - C_D_box

C_D_box_snoRNA

SO:0000593

Definition: Most box C/D snoRNAs also contain long (>10 nt) sequences complementary to rRNA. Boxes C and D, as well as boxes C' and D', are usually located in close proximity, and form a structure known as the box C/D motif. This motif is important for snoRNA stability, processing, nucleolar targeting and function. A small number of box C/D snoRNAs are involved in rRNA processing; most, however, are known or predicted to serve as guide RNAs in ribose methylation of rRNA. Targeting involves direct base pairing of the snoRNA at the rRNA site to be modified and selection of a rRNA nucleotide a fixed distance from box D or D'.

Comments and references

Added 'SNORD' as a synonym of C_D_box_snoRNA (SO:0000593) and 'SNORA' as a synonym of H_ACA_box_snoRNA (SO:0000594). See GitHub Issue #577.

Definition references: http://www.bio.umass.edu/biochem/rna-sequence/Yeast_snoRNA_Database/snoRNA_DataBase.html

Synonyms

Scope	Value
exact	C D box snoRNA
exact	C/D box snoRNA
exact	SNORD
exact	box C/D snoRNA

Identifiers and subsets

Accession: SO:0000593

Persistent URL: http://purl.obolibrary.org/obo/SO_0000593

Alternate IDs: None

Subsets: SOFA

Cross references: None

History summary

Term history is reconstructed from the Git-era ontology files by comparing ontology classes across revisions. Earlier SVN-era changes will be added at a future date.

First seen in Git-era editable history: 2016-12-05 in commit 92e3cae

Most recent Git-era change: 2022-10-28 in commit f7115da

Number of changes: 2

Ontology neighborhood diagram

The local DAG shows nearby parent, child, and related terms. Each node links to its own term page.

Relationships

Parents

SO:0000275 - snoRNA

Children

http://purl.obolibrary.org/obo/so#derives_from (outgoing)

SO:0000595 - C_D_box_snoRNA_primary_transcript

Change history

This timeline summarizes changes identified in SO’s GitHub commit history, including updates to labels, definitions, parent terms, synonyms, subsets, and obsoletion status. It is a best-effort reconstruction and may not include every change to a term. Since only history from GitHub is included at the moment, any term added before the migration from SVN to Git will show as being created in 2016. This will be addressed once SVN history is incorporated.

Date	Change	Summary	Evidence
2022-10-28	synonym added	Synonym added: SNORD Scope: exact	`f7115da` #577
2016-12-05	created	Term introduced into the editable ontology history Initial label: C_D_box_snoRNA Initial definition captured. Initial parent: SO:0000275	`92e3cae`