nuclear mRNA splicing, via spliceosome

Term Information

Accession
GO:0000398
Ontology
biological process
Synonyms
related: splicing AT-AC intron
related: splicing GT-AG intron
narrow: nuclear mRNA splicing via U12-type spliceosome
narrow: nuclear mRNA splicing via U2-type spliceosome
alt_id: GO:0006374
alt_id: GO:0006375
broad: mRNA splicing
broad: pre-mRNA splicing
Definition
The joining together of exons from one or more primary transcripts of nuclear messenger RNA (mRNA) and the excision of intron sequences, via a spliceosomal mechanism, so that mRNA consisting only of the joined exons is produced. [source: GOC:krc, ISBN:0198506732, ISBN:0879695897]
Comment
Note that although the many U12-type introns have the sequence AT-AC at the intron termini, some introns with these terminal sequences are spliced by the U2-type spliceosome. The distinguishing characteristics are sequences near the 5' splice site and the branch point sequences of the intron. Note that although the majority of U2-type introns have the sequence GU-AG at the intron termini, some introns with these terminal sequences are spliced by the U12-type spliceosome. The distinguishing characteristics are sequences near the 5' splice site and the branch point sequences of the intron.
Subset
None
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