OBSOLETE. The endonucleolytic cleavage of a mRNA containing an HAC1-type intron at the 5' and 3' splice sites. The cleavage step is part of unconventional mRNA splicing, and contributes to the endoplasmic reticulum unfolded protein response.
Source:
GOC:krc,
GOC:bf,
GOC:mah,
PMID:10357823
Comment
The reason for obsoletion is that this process represents a single step (molecular function) of the IRE1-mediated unfolded protein response (GO:0036498).
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