function:SNARE that may be involved in targeting and fusion of Golgi-derived retrograde transport vesicles with the ER.,similarity:Belongs to the USE1 family.,subunit:Component of a SNARE complex consisting of STX18, USE1L, BNIP1/SEC20L and SEC22B. Interacts directly with STX18.,
Endoplasmic reticulum membrane ; Single-pass type IV membrane protein .