| U1 spliceosomal RNA | |
|---|---|
 Predicted secondary structure and sequence conservation of U1 | |
| Identifiers | |
| Symbol | U1 |
| Rfam | RF00003 |
| Other data | |
| RNA type | Gene; snRNA; splicing |
| Domain(s) | Eukaryota |
| GO | GO:0000368 GO:0030627 GO:0005685 |
| SO | SO:0000391 |
| PDB structures | PDBe |
U1 spliceosomal RNA is the small nuclear RNA (snRNA) component of U1 snRNP (small nuclear ribonucleoprotein), an RNA-protein complex that combines with other snRNPs, unmodified pre-mRNA, and various other proteins to assemble a spliceosome, a large RNA-protein molecular complex upon which splicing of pre-mRNA occurs. Splicing, or the removal of introns, is a major aspect of post-transcriptional modification, and takes place only in the nucleus of eukaryotes.