Predicted to enable several functions, including FFAT motif binding activity; protein dimerization activity; and tubulin binding activity. Predicted to be involved in several processes, including IRE1-mediated unfolded protein response; endoplasmic reticulum organization; and modulation by host of viral genome replication. Predicted to act upstream of or within response to unfolded protein. Located in membrane. Is expressed in dorsal root ganglion. Human ortholog(s) of this gene implicated in amyotrophic lateral sclerosis; amyotrophic lateral sclerosis type 8; autosomal dominant adult-onset proximal spinal muscular atrophy; and spinal muscular atrophy. Orthologous to human VAPB (VAMP associated protein B and C). [provided by Alliance of Genome Resources, Apr 2022]