U2-type prespliceosome
GT-AG prespliceosome
narrow
major prespliceosome
exact
mammalian U2-type spliceosomal complex A
narrow
yeast U2-type spliceosomal complex B
narrow
A spliceosomal complex that is formed by association of the 5' splice site with the U1 snRNP, while the branch point sequence is recognized by the U2 snRNP. The prespliceosome includes many proteins in addition to those found in the U1 and U2 snRNPs. Commitment to a given pair of 5' and 3' splice sites occurs at the time of prespliceosome formation.
GO:0005684
U2-type spliceosomal complex
is_a
GO:0071010
prespliceosome
is_a
SPBC4B4.09 SPBP35G2.09 SPBC839.10 SPBC4B4.05 SPAC27F1.09c SPAC22A12.09c SPAC13C5.02 SPBC1861.08c SPBC4B4.07c SPAC4D7.13 SPAC26A3.08 SPBC211.02c SPAC22F8.10c SPCC10H11.01 SPAP8A3.06 SPCC962.06c SPBC11G11.06c SPAC19A8.13 SPBC21C3.05 SPAC2C4.03c SPAC31G5.01 SPBC146.07 SPBC31F10.11c SPBC19C2.14 SPBC36.09 SPBC3E7.13c SPCC16A11.13 SPBC8D2.09c SPAPJ698.03c SPCC285.12 SPBC23E6.01c SPAC27D7.07c