FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term U12-type catalytic step 1 spliceosome ID (Ontology) GO:0071017 (Gene Ontology)
Definition A spliceosomal complex that is formed by the displacement of the U11 and U4atac snRNPs from the precatalytic spliceosome; the U12, U5 and U6atac snRNPs remain associated with the mRNA. This complex, sometimes called the activated spliceosome, is the catalytically active form of the spliceosome, and includes many proteins in addition to those found in the U12, and U5 and U6atac snRNPs.[ ISBN:0879695897 ISBN:0879697393 PubMed:16201866 ]
Also Known As "minor catalytic step 1 spliceosome" ; "U12-type activated spliceosome"
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spliceosomal complex
 |__U12-type spliceosomal complex__
 |__catalytic step 1 spliceosome___|
catalytic complex                  |
 |__catalytic step 1 spliceosome___|
                                   U12-type catalytic step 1 spliceosome
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Is a U12-type spliceosomal complex
catalytic step 1 spliceosome
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Synonyms
  • "AT-AC catalytic step 1 spliceosome" NARROW
    "mammalian U12-type spliceosomal complex B*" NARROW[ ISBN:0879695897 ISBN:0879697393 PubMed:19239890 ]
    "mammalian U12-type spliceosomal complex B2" NARROW[ ISBN:0879695897 ISBN:0879697393 ]
    "minor catalytic step 1 spliceosome" EXACT
    "U12-type activated spliceosome" EXACT[ ISBN:0879695897 ISBN:0879697393 ]
    "yeast U12-type spliceosomal complex A1" NARROW[ ISBN:0879695897 ISBN:0879697393 ]
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