U12-type catalytic step 1 spliceosome

id: GO:0071017
name: U12-type catalytic step 1 spliceosome
namespace: cellular_component
type: go
obsolete: False

Description: 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.

Parent Functions