TBC1d24-ephrinB2 interaction regulates contact inhibition of locomotion in neural crest cell migration

Nat Commun. 2018 Aug 28;9(1):3491. doi: 10.1038/s41467-018-05924-9.

Abstract

Although Eph-ephrin signalling has been implicated in the migration of cranial neural crest (CNC) cells, it is still unclear how ephrinB transduces signals regulating this event. We provide evidence that TBC1d24, a putative Rab35-GTPase activating protein (Rab35 GAP), complexes with ephrinB2 via the scaffold Dishevelled (Dsh) and mediates a signal affecting contact inhibition of locomotion (CIL) in CNC cells. Moreover, we found that, in migrating CNC, the interaction between ephrinB2 and TBC1d24 negatively regulates E-cadherin recycling in these cells via Rab35. Upon engagement of the cognate Eph receptor, ephrinB2 is tyrosine phosphorylated, which disrupts the ephrinB2/Dsh/TBC1d24 complex. The dissolution of this complex leads to increasing E-cadherin levels at the plasma membrane, resulting in loss of CIL and disrupted CNC migration. Our results indicate that TBC1d24 is a critical player in ephrinB2 control of CNC cell migration via CIL.

Publication types

  • Research Support, N.I.H., Intramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Blotting, Western
  • Carrier Proteins / genetics
  • Carrier Proteins / metabolism*
  • Cell Movement / genetics
  • Cell Movement / physiology
  • Embryo, Nonmammalian / cytology*
  • Embryo, Nonmammalian / metabolism*
  • Ephrin-B2 / genetics
  • Ephrin-B2 / metabolism*
  • GTPase-Activating Proteins
  • Immunoprecipitation
  • Locomotion / genetics
  • Locomotion / physiology
  • Membrane Proteins
  • Microscopy, Fluorescence
  • Nerve Tissue Proteins
  • Neural Crest / cytology*
  • Neural Crest / metabolism*
  • Phosphorylation
  • Protein Binding
  • Xenopus

Substances

  • Carrier Proteins
  • Ephrin-B2
  • GTPase-Activating Proteins
  • Membrane Proteins
  • Nerve Tissue Proteins
  • TBC1D24 protein, human