Beta-barrel pore-forming protein which possesses voltage-dependent channel activity (PubMed:25401771). Required for proper plastid development (PubMed:29758131). Involved in the maintenance of metabolic homeostasis of full-grown plants (PubMed:29758131). Expressed in germinating seeds (PubMed:25608613). Expressed in the vasculature of roots, cotyledons and leaves (PubMed:25608613, PubMed:29758131). Stunted growth, pale-green leaves, altered plastid structures in leaves, altered photosynthesis activity, and reduced accumulation of starch in leaf chloroplasts. Belongs to the OEP80 (TC 1.B.33.2) family.