| Type | subunit | Description | COPII is composed of at least five proteins: the Sec23/24 complex, the Sec13/31 complex and Sar1. Interacts with TMED2. Interacts (as part of the Sec23/24 complex) with SEC22B; recruits SEC22B into COPII-coated vesicles for its transport from the endoplasmic reticulum to the Golgi (By similarity). Interacts with STING1; promoting STING1 translocation to COPII vesicles in a STEEP1-dependent manner (By similarity). Interacts with TMEM39A (By similarity). Interacts with SACM1L; this interaction is reduced in the absence of TMEM39A (By similarity). |
