Cell surface receptor for SEMA4A and for class 3 semaphorins, such as SEMA3A, SEMA3C and SEMA3E. Plays an important role in cell-cell signaling, and in regulating the migration of a wide spectrum of cell types. Regulates the migration of thymocytes in the medulla. Regulates endothelial cell migration. Plays an important role in ensuring the specificity of synapse formation. Required for normal development of the heart and vasculature (By similarity). Mediates anti-angiogenic signaling in response to SEMA3E. Interacts with NRP1 and SEMA4A (By similarity). Interacts with SH3BP1; they dissociate upon SEMA3E binding to PLXND1 allowing SH3BP1 to transduce downstream signal through RAC1 inactivation (PubMed:24841563). Detected at low levels in heart, placenta, lung, skeletal muscle, kidney, thymus and liver. Detected at very low levels in brain, colon, spleen, small intestine and peripheral blood leukocytes. Belongs to the plexin family. Extended N-terminus.