Positive regulator of amino acid starvation-induced autophagy. Homodimer. Interacts with ARL1, ARL2 and ARL3. Directly interacts with FEZ1 and UVRAG. The interaction with UVRAG is reduced by amino acid starvation, but the complex is stabilized in the presence of FEZ1. Interacts with NRBF2. Belongs to the SCOC family.