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Complex Genetic Interactions among Four Receptor Tyrosine Phosphatases Regulate Axon Guidance in Drosophila

Sun, Qi and Schindelholz, Benno and Knirr, Matthias and Schmid, Aloisia and Zinn, Kai (2001) Complex Genetic Interactions among Four Receptor Tyrosine Phosphatases Regulate Axon Guidance in Drosophila. Molecular and Cellular Neuroscience, 17 (2). pp. 274-291. ISSN 1044-7431. doi:10.1006/mcne.2000.0939.

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Four receptor-linked protein tyrosine phosphatases are selectively expressed on central nervous system axons in the Drosophila embryo. Published data show that three of these (DLAR, DPTP69D, DPTP99A) regulate motor axon guidance decisions during embryonic development. Here we examine the role of the fourth neural phosphatase, DPTP10D, by analyzing double-, triple-, and quadruple-mutant embryos lacking all possible combinations of the phosphatases. This analysis shows that all four phosphatases participate in guidance of interneuronal axons within the longitudinal tracts of the central nervous system. In the neuromuscular system, DPTP10D works together with the other three phosphatases to facilitate outgrowth and bifurcation of the SNa nerve, but acts in opposition to the others in regulating extension of ISN motor axons past intermediate targets. Our results provide evidence for three kinds of genetic interactions among the neural tyrosine phosphatases: partial redundancy, competition, and collaboration.

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Zinn, Kai0000-0002-6706-5605
Additional Information:© 2001 by Academic Press. Received June 16, 2000; Revised November 15, 2000; Accepted November 20, 2000; Published online January 19, 2001. We thank Bruce Burkemper for the anti-DLAR mAb 8C4; Chand Desai for ISN and ISNb images and discussions on motor axon phenotypes; Paul Garrity, Chi-Hon Lee, and Larry Zipursky for the DPTP69D transgenic rescue lines; and Tony Hunter for discussions on RPTP dimerization. This work was supported by an NIH RO1 grant (NS28182) and a Human Frontiers Science Project grant (RG0122/1997-B) to K.Z.
Funding AgencyGrant Number
NIHRO1 NS28182
Human Frontiers Science ProjectRG0122/1997-B
Issue or Number:2
Record Number:CaltechAUTHORS:20151222-154427847
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Official Citation:Qi Sun, Benno Schindelholz, Matthias Knirr, Aloisia Schmid, Kai Zinn, Complex Genetic Interactions among Four Receptor Tyrosine Phosphatases Regulate Axon Guidance in Drosophila, Molecular and Cellular Neuroscience, Volume 17, Issue 2, February 2001, Pages 274-291, ISSN 1044-7431, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63154
Deposited By: Tony Diaz
Deposited On:23 Dec 2015 20:31
Last Modified:10 Nov 2021 23:12

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