May play a role in neurite plasticity by maintaining cytoskeleton stability and regulating synaptic vesicle transport. Interacts with AP5Z1, AP5B1, AP5S1 and ZFYVE26. Mainly cytoplasmic. Ubiquitously expressed at low level. Expressed in embryonic and adult cortical projection neurons. Expressed in all brain areas analyzed from embryonic (18 dpc) and adult mice. Truncated N-terminus. Truncated N-terminus.