prespliceosome

Term ID

GO:0071010

Synonyms

• mammalian spliceosomal complex A
• prespliceosomal complex
• yeast spliceosomal complex B

Definition

A spliceosomal complex that is formed by association of the 5' splice site and the branch point sequence with specific snRNPs. The prespliceosome includes many proteins in addition to those found in the bound snRNPs. Commitment to a given pair of 5' and 3' splice sites occurs at the time of prespliceosome formation. Prespliceosome complexes are not active for splicing, but are instead an early step in the assembly of a spliceosomal complex. (2)

References

Ontology

GO: Cellular Component    QuickGO    AmiGO