Plexin B2 (PLXNB2)

Members of the B class of plexins, such as PLXNB2 is related to human SEP (PLXNB1). RT-PCR detected highest PLXNB2 expression in testis and ovary, followed by placenta, lung, liver, and kidney. Much lower expression was detected in prostate and small intestine, and little to none was detected in other tissues examined.

Ligand-induced dimerization of plexin B was sufficient to stimulate endogenous RhoA (ARHA) potently and induce the reorganization of the cytoskeleton in mammalian cells. Overexpression of the PDZ domain of PDZ-RhoGEF prevented cell rounding and neurite retraction in differentiated rat neural precursor cells induced by activation of endogenous PLXNB1 by semaphorin-4D .