prespliceosome
mammalian spliceosomal complex A
narrow
prespliceosomal complex
exact
yeast spliceosomal complex B
narrow
A spliceosomal complex that is formed by association of the 5' splice site and the branch point sequence with specific snRNPs. The prespliceosome includes many proteins in addition to those found in the bound snRNPs. Commitment to a given pair of 5' and 3' splice sites occurs at the time of prespliceosome formation. Prespliceosome complexes are not active for splicing, but are instead an early step in the assembly of a spliceosomal complex.
GO:0005681
spliceosomal complex
is_a
SPBC36.09 SPBC23E6.01c SPBC11G11.06c SPBC1861.08c SPCC962.06c SPBP35G2.09 SPAC4D7.13 SPBC4B4.07c SPAPJ698.03c SPBC4B4.05 SPCC10H11.01 SPAC27F1.09c SPAC13C5.02 SPAC22A12.09c SPAC2C4.03c SPAP8A3.06 SPAC31G5.01 SPBC31F10.11c SPBC19C2.14 SPAC27D7.07c SPAC19A8.13 SPBC211.02c SPCC285.12 SPAC22F8.10c SPBC21C3.05 SPBC8D2.09c SPAC26A3.08 SPBC4B4.09 SPBC146.07 SPBC839.10 SPBC3E7.13c SPCC16A11.13