Neuron
Volume 32, Issue 1, 11 October 2001, Pages 53-62
Journal home page for Neuron

Article
The Transmembrane Protein Off-Track Associates with Plexins and Functions Downstream of Semaphorin Signaling during Axon Guidance

https://doi.org/10.1016/S0896-6273(01)00446-9Get rights and content
Under an Elsevier user license
open archive

Abstract

The Plexin family of transmembrane proteins appears to function as repulsive receptors for most if not all Semaphorins. Here, we use genetic and biochemical analysis in Drosophila to show that the transmembrane protein Off-track (OTK) associates with Plexin A, the receptor for Sema 1a, and that OTK is a component of the repulsive signaling response to Semaphorin ligands. In vitro, OTK associates with Plexins. In vivo, mutations in the otk gene lead to phenotypes resembling those of loss-of-function mutations of either Sema1a or PlexA. The otk gene displays strong genetic interactions with Sema1a and PlexA, suggesting that OTK and Plexin A function downstream of Sema 1a.

Cited by (0)

5

Present address: Exelixis, Inc., 170 Harbor Way, P.O. Box 511, South San Francisco, California 94083-0511.

6

Present address: Renovis, Inc., 270 Littlefield Avenue, South San Francisco, California 94080.