Everything about U2 Spliceosomal Rna totally explained
U2 spliceosomal RNA is a
small nuclear RNA (snRNA) component of the
spliceosome (involved in pre-
mRNA splicing).
Complementary binding between U2 snRNA (in an area lying towards the 5' end but 3' to hairpin I) and the
branchpoint sequence (BPS) of the
intron results in the bulging out of an unpaired
adenosine, on the BPS, which initiates a
nucleophilic attack at the intronic 5' splice site, thus starting the first of two
transesterification reactions that mediate splicing.
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