Cell surface receptor for PLXNA2 that plays an important role in cell-cell signaling. Required for normal granule cell migration in the developing cerebellum. Promotes reorganization of the actin cytoskeleton and plays an important role in axon guidance in the developing central nervous system. Can act as repulsive axon guidance cue. Has repulsive action towards migrating granular neurons. May play a role in channeling sympathetic axons into the sympathetic chains and controlling the temporal sequence of sympathetic target innervation. (Microbial infection) Acts as a receptor for P.sordellii toxin TcsL in the in the vascular endothelium. Active as a homodimer or oligomer (By similarity). The SEMA6A homodimer interacts with a PLXNA2 homodimer, giving rise to a heterotetramer (By similarity). Interacts with EVL (PubMed:10993894). (Microbial infection) Interacts with P.sordellii toxin TcsL; semaphorins SEMA6A and SEMA6B constitute the major host receptors for TcsL in the vascular endothelium. Belongs to the semaphorin family. Extended N-terminus.