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. 2006 Sep 14;103(39):14343–14348. doi: 10.1073/pnas.0606480103

Fig. 5.

Fig. 5.

Model for staged activation of IRE1. The model depicts that several steps mediate IRE1 activation including BiP release, initial intramolecular autophosphorylation, dimerization, and dimerization-induced trans-autophosphorylation (see Discussion for details). Increasing degrees of IRE1 autophosphorylation cause higher levels of RNase activity indicated as darker shades of brown.