Crossref journal-article
The Company of Biologists
Development (237)
Abstract

ABSTRACT The neural receptor tyrosine phosphatases DPTP69D, DPTP99A and DLAR are involved in motor axon guidance in the Drosophila embryo. Here we analyze the requirements for these three phosphatases in growth cone guidance decisions along the ISN and SNb motor pathways. Any one of the three suffices for the progression of ISN pioneer growth cones beyond their first intermediate target in the dorsal muscle field. DLAR or DPTP69D can facilitate outgrowth beyond a second intermediate target, and DLAR is uniquely required for formation of a normal terminal arbor. A different pattern of partial redundancy among the three phosphatases is observed for the SNb pathway. Any one of the three suffices to allow SNb axons to leave the common ISN pathway at the exit junction. When DLAR is not expressed, however, SNb axons sometimes bypass their ventrolateral muscle targets after leaving the common pathway, instead growing out as a separate bundle adjacent to the ISN. This abnormal guidance decision can be completely suppressed by also removing DPTP99A, suggesting that DLAR turns off or counteracts a DPTP99A signal that favors the bypass axon trajectory. Our results show that the relationships among the tyrosine phosphatases are complex and dependent on cellular context. At growth cone choice points along one nerve, two phosphatases cooperate, while along another nerve these same phosphatases can act in opposition to one another.

Bibliography

Desai, C. J., Krueger, N. X., Saito, H., & Zinn, K. (1997). Competition and cooperation among receptor tyrosine phosphatases control motoneuron growth cone guidance in Drosophila. Development, 124(10), 1941–1952.

Authors 4
  1. Chand J. Desai (first)
  2. Neil X. Krueger (additional)
  3. Haruo Saito (additional)
  4. Kai Zinn (additional)
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Dates
Type When
Created 4 years, 4 months ago (April 23, 2021, 3:01 p.m.)
Deposited 6 months, 2 weeks ago (Feb. 13, 2025, 10:04 p.m.)
Indexed 1 month, 3 weeks ago (July 2, 2025, 3:11 p.m.)
Issued 28 years, 3 months ago (May 15, 1997)
Published 28 years, 3 months ago (May 15, 1997)
Published Online 28 years, 3 months ago (May 15, 1997)
Published Print 28 years, 3 months ago (May 15, 1997)
Funders 0

None

@article{Desai_1997, title={Competition and cooperation among receptor tyrosine phosphatases control motoneuron growth cone guidance in Drosophila}, volume={124}, ISSN={1477-9129}, url={http://dx.doi.org/10.1242/dev.124.10.1941}, DOI={10.1242/dev.124.10.1941}, number={10}, journal={Development}, publisher={The Company of Biologists}, author={Desai, Chand J. and Krueger, Neil X. and Saito, Haruo and Zinn, Kai}, year={1997}, month=may, pages={1941–1952} }