spliceosome conformational change to release U4 (or U4atac) and U1 (or U11)
Rearrangement of the pre-catalytic spliceosome containing U4 (or U4atac) and U1 (or U11) snRNPs to unpair U4 (or U4atac) from U6 (or U6atac) and release it from the spliceosomal complex along with U1 (or U11).
GO:0022618
protein-RNA complex assembly
is_a
GO:0000393
spliceosomal conformational changes to generate catalytic conformation
part_of
3'-splice site cleavage, exon ligation
broad
U12-type spliceosome conformational change to release U4atac and U11
narrow
U2-type spliceosome conformational change to release U4 and U1
narrow
spliceosomal A1 complex biosynthesis
narrow
spliceosomal A1 complex formation
narrow
spliceosomal B2 complex biosynthesis
narrow
spliceosomal B2 complex formation
narrow
SPAC9.03c