precatalytic spliceosome
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.
GO:0005681
spliceosomal complex
is_a
mammalian spliceosomal complex B
narrow
mammalian spliceosomal complex B1
narrow
yeast spliceosomal complex A2-1
narrow
SPBC9B6.05c SPBC119.13c SPCC1620.01c SPAC23H3.02c SPBC887.05c SPBC11G11.06c SPAC27D7.07c SPBC211.05 SPBC19C2.14 SPCC1840.10 SPBC18H10.07 SPAC31G5.01 SPCC162.01c SPAC607.03c SPAC2C4.03c SPBC19C2.08 SPAC22F8.10c SPAC19A8.13 SPBC4B4.05