Sci. STKE, 10 August 2004
CELL MIGRATION Repulsive Signaling
Plexins are cell surface receptors for the semaphorin family of guidance molecules. Semaphorins were originally identified as repulsive axonal guidance molecules in the developing nervous system, but they are also implicated in morphogenesis, angiogenesis, immune response, and tumor metastasis in a variety of tissues. Oinuma et al. describe a signal transduction pathway mediated by a semaphorin, the transmembrane receptor Plexin-B1. Plexin-B1 acts as a guanosine triphosphatase (GTPase)-activating protein toward the Ras family small GTPase R-Ras, a key regulator of cell adhesion, to promote repulsive signaling by Plexin-B1.
Citation: Repulsive Signaling. Sci. STKE 2004, tw289 (2004).
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