trans assembly of SL-containing precatalytic spliceosome
Assembly of a spliceosomal complex containing the SL RNA and the pre-mRNA to be joined, as well as all the spliceosomal snRNPs involved in trans leader splicing. Formation of the trans leader spliceosome brings together the quadruple SL/U4/U5/U6 snRNP and the complex of the U2 snRNP with the splice site of the pre-mRNA.
GO:0022618
protein-RNA complex assembly
is_a
GO:0000245
spliceosomal complex assembly
part_of
GO:0045291
mRNA trans splicing, SL addition
part_of
trans assembly of spliced leader-containing precatalytic spliceosome
exact