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General Information
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| Term |
U1_snRNA |
ID (Ontology) |
SO:0000391 (Sequence Ontology) |
| Definition |
U1 is a small nuclear RNA (snRNA) component of the spliceosome (involved in pre-mRNA splicing). Its 5' end forms complementary base pairs with the 5' splice junction, thus defining the 5' donor site of an intron. There are significant differences in sequence and secondary structure between metazoan and yeast U1 snRNAs, the latter being much longer (568 nucleotides as compared to 164 nucleotides in human). Nevertheless, secondary structure predictions suggest that all U1 snRNAs share a 'common core' consisting of helices I, II, the proximal region of III, and IV. |
| Also Known As |
"small nuclear RNA U1" ; "snRNA U1" ; "U1 small nuclear RNA" (for all, see Synonyms field below) |
| Comment |
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Links to External Ontologies
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SO.org
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Annotations
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Records annotated with this term OR any of its CHILD TERMS
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Records annotated with this exact term (annotations to child terms are NOT included)
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No relevant records available
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Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
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No relevant statements available
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Relationships