May act as a negative factor in protein storage vacuole (PSV) trafficking regulation and plant effector triggered immunity (ETI). Negatively regulated upon interaction with GSF12, and also probably by BCHB. Required for ETI, but not for cell death. Interacts (via BEACH-type PH domain) with GFS12 (via protein kinase 2 domain). The BEACH-type PH domain (1556-1653) is required for interaction with GFS12. No visible phenotype.