U13 (DF0001074)

This model represents a noncoding RNA gene. Some ncRNA genes have transformed into, or become assimilated into transposons. Others occur in sufficient copy number that ab initio repeat finders may classify them as repetitive elements. This entry is used to correctly identify the gene and its pseudogenes and prevent misannotation.

U13 C/D box snoRNA gene / pseudogene


U13 is an unusual snoRNA that is involved in pre-rRNA cleavage rather than RNA methylation. There are several hundred U13 pseudogenes in the human genome.


  1. Three pseudogenes for human U13 snRNA belong to class III.
    Baserga SJ, Yang XD, Steitz JA;
    Gene 1991;107:347-348 Pubmed


Accession Name Wikipedia
Type ncRNA Gene Article
Class snoRNA Article
Superfamily U14 Article

Hit Statistics

The model is 108 positions long. The average length of non-redundant hits to the model is 105.1. This table shows the number of hits above score thresholds:

Species Gathering Trusted
non-redundant all hits non-redundant all hits
Mus musculus 40 41 22 22
Homo sapiens 385 499 378 484
Danio rerio 3 3 1 1

External Database Links

  • Repbase : U13 [Requires Repbase registration]