U1 (DF0001073)

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.

U1 snRNA (spliceosomal RNA) gene / pseudogene


U1 snRNA genes are multicopy, and spawn a large number of pseudogenes in human.


  1. Characterization of small nuclear RNA U1 gene candidates and pseudogenes from the human genome.
    Manser T, Gesteland RF;
    J Mol Appl Genet 1981;1:117-125 Pubmed

  2. Transcription of a gene for human U1 small nuclear RNA.
    Murphy JT, Burgess RR, Dahlberg JE, Lund El
    Cell 1982;29:265-274 Pubmed


Accession Name Wikipedia
Type ncRNA Gene Article
Class snRNA Article
Superfamily U1 Article

Hit Statistics

The model is 165 positions long. The average length of non-redundant hits to the model is 149.6. This table shows the number of hits above score thresholds:

Species Gathering Trusted
non-redundant all hits non-redundant all hits
Mus musculus 296 328 274 302
Homo sapiens 164 208 155 198
Danio rerio 57 389 52 384

External Database Links

  • Repbase : U1 [Requires Repbase registration]