Modulator of macroautophagy that causes accumulation of autophagosomes under basal conditions and enhances autophagic flux (By similarity). Represses cell death and promotes long-term clonogenic survival of cells grown in the absence of glucose in a macroautophagy-independent manner (By similarity). May have some role in extracellular matrix engulfment or growth factor receptor recycling, both of which can modulate cell survival (By similarity). Localizes mainly at the plasma membrane where it concentrates at actin-rich focal adhesions (By similarity). Belongs to the DRAM/TMEM150 family.