Transmembrane protein 33 (TMEM33)

Acts as a regulator of the tubular endoplasmic reticulum (ER) network. Suppresses the RTN3/4-induced formation of the ER tubules (PubMed:25612671).

Positively regulates PERK-mediated and IRE1-mediated unfolded protein response signaling (PubMed:26268696). .