Possible role in axon guidance through interaction with RTN4R. (Microbial infection) Acts as a receptor for adeno-associated virus and is involved in adeno-associated virus infection through endocytosis system. Interacts with RTN4R. Traffics from the plasma membrane to the trans-Golgi network. N-glycosylated. Homozygous knockout mice Kiaa0319l are normal. Contaminating sequence. Sequence of unknown origin in the N-terminal part.