FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term precatalytic spliceosome ID (Ontology) GO:0071011 (Gene Ontology)
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.[ PubMed:18322460 PubMed:19239890 ]
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Annotations
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)
Data Class Field Records
Genes (FBgn)  GO_BIOLOGICAL_PROCESS     139
Genes (FBgn)  GO_CELLULAR_COMPONENT     141
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 Full annotation statements 
Relevant FlyBase reports
 Genes
 precatalytic spliceosome (all annotations which use CV term, excluding "NOT" statements)     141
     part_of | precatalytic spliceosome     141
Spanning Tree (Parents/Children)
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nuclear protein-containing complex__
ribonucleoprotein complex___________|
                                    spliceosomal complex
                                     |__precatalytic spliceosome  142 rec.
                                         |__U2-type precatalytic spliceosome 1 rec.
                                         |__U12-type precatalytic spliceosome
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Is a spliceosomal complex
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Synonyms
  • "mammalian spliceosomal complex B" NARROW[ ISBN:0879695897 ISBN:0879697393 PubMed:19239890 ]
    "mammalian spliceosomal complex B1" NARROW[ ISBN:0879695897 ISBN:0879697393 ]
    "yeast spliceosomal complex A2-1" NARROW[ ISBN:0879695897 ISBN:0879697393 ]
Secondary IDs
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