Receptor tyrosine phosphatases are required for motor axon guidance in the Drosophila embryo

Cell. 1996 Feb 23;84(4):599-609. doi: 10.1016/s0092-8674(00)81035-1.


The receptor tyrosine phosphatases DPTP69D and DPTP99A are expressed on motor axons in Drosophila embryos. In mutant embryos lacking DPTP69D protein, motor neuron growth cones stop growing before reaching their muscle targets, or follow incorrect pathways that bypass these muscles. Mutant embryos lacking DPTP99A are indistinguishable from wild type. Motor axon defects in dptp69D dptp99A double mutant embryos, however, are much more severe than in embryos lacking only DPTP69D. Our results demonstrate that DPTP69D and DPTP99A are required for motor axon guidance and that they have partially redundant functions during development of the neuro-muscular system.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Axons / enzymology*
  • Central Nervous System / cytology
  • Central Nervous System / metabolism
  • Drosophila / embryology*
  • Drosophila / enzymology*
  • Embryo, Nonmammalian / enzymology*
  • Genes, Insect / physiology
  • Motor Neurons / enzymology*
  • Motor Neurons / ultrastructure
  • Mutation / physiology
  • Neural Pathways
  • Phenotype
  • Protein Tyrosine Phosphatases / genetics
  • Protein Tyrosine Phosphatases / metabolism*


  • Protein Tyrosine Phosphatases