Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published January 1995 | public
Journal Article

Targeted mutagenesis and genetic analysis of a Drosophila receptor-linked protein tyrosine phosphatase gene


Several Drosophila receptor-linked protein tyrosine phosphatases (R-PTPs) are selectively expressed on axons of the developing embryonic central nervous system. The extracellular domains of these axonal R-PTPs are homologous to neural adhesion molecules. Thus, R-PTPs may directly couple cell recognition to signal transduction via control of tyrosine phosphorylation. To examine the function of these molecules during nervous system development, we wished to generate mutations in R-PTP genes. It was unclear whether a mutation in a single R-PTP gene would confer lethality, however, because the similarities in sequence and expression pattern between the axonal R-PTPs suggest that they may have partially redundant functions. To circumvent this problem, we developed a directed mutagenesis strategy based on local transposition of P elements, and used this approach to isolate a null mutation in the DPTP99A gene. This strategy, which we describe in detail here, should be applicable to any Drosophila gene within a lettered division of an appropriately marked P element. Flies lacking DPTP99A expression are viable and fertile, and we have been unable to detect any alterations in the embryonic nervous system of DPTP99A embryos using a variety of antibody markers.

Additional Information

© 1995 Springer Verlag. Received: 30 May 1994; Accepted: 13 July 1994.

Additional details

August 22, 2023
October 25, 2023