Figure 2.
Unfolded protein response (UPR)-mediated olfactory receptor (OR) feedback. ❶ Histone demethylation by LSD1 activates an OR gene. ❷ As the OR is being translated, it activates the PERK branch of the UPR. ❸ This activation results in EIF2A phosphorylation and Atf5 translation. ❹ ATF5 activates Adcy3 transcription, and ❺ ADCY3 then prevents further LSD1 activity. ❻ ATF5 also activates Rtp1 transcription. ❼ RTP1 suppresses further UPR activation. ER, endoplasmic reticulum.