precatalytic spliceosome

Term ID

GO:0071011

Synonyms

• mammalian spliceosomal complex B
• mammalian spliceosomal complex B1
• yeast spliceosomal complex A2-1

Definition

A spliceosomal complex that is formed by the recruitment of a preassembled U5-containing tri-snRNP to the prespliceosome. Although all 5 snRNPs are present, the precatalytic spliceosome is catalytically inactive. The precatalytic spliceosome includes many proteins in addition to those found in the associated snRNPs. (2)

References

Ontology

GO: Cellular Component    QuickGO    AmiGO