PUBLICATION

Zebrafish trilobite identifies new roles for Strabismus in gastrulation and neuronal movements

Authors
Jessen, J.R., Topczewski, J., Bingham, S., Sepich, D.S., Marlow, F., Chandrasekhar, A., and Solnica-Krezel, L.
ID
ZDB-PUB-020716-20
Date
2002
Source
Nature cell biology   4(8): 610-615 (Journal)
Registered Authors
Bingham, Stephanie, Chandrasekhar, Anand, Jessen, Jason R., Marlow, Florence, Sepich, Diane, Solnica-Krezel, Lilianna, Topczewski, Jacek
Keywords
none
MeSH Terms
  • Animals
  • Cell Movement
  • Gastrula/metabolism
  • Membrane Proteins/genetics
  • Membrane Proteins/metabolism*
  • Mutation
  • Neurons/cytology
  • Neurons/metabolism
  • Signal Transduction
  • Zebrafish/embryology*
  • Zebrafish/genetics
  • Zebrafish/metabolism*
  • Zebrafish Proteins/genetics
  • Zebrafish Proteins/metabolism*
PubMed
12105418 Full text @ Nat. Cell Biol.
Abstract
Embryonic morphogenesis is driven by a suite of cell behaviours, including coordinated shape changes, cellular rearrangements and individual cell migrations, whose molecular determinants are largely unknown. In the zebrafish, Dani rerio, trilobite mutant embryos have defects in gastrulation movements and posterior migration of hindbrain neurons. Here, we have used positional cloning to demonstrate that trilobite mutations disrupt the transmembrane protein Strabismus (Stbm)/Van Gogh (Vang), previously associated with planar cell polarity (PCP) in Drosophila melanogaster, and PCP and canonical Wnt/beta-catenin signalling in vertebrates. Our genetic and molecular analyses argue that during gastrulation, trilobite interacts with the PCP pathway without affecting canonical Wnt signalling. Furthermore, trilobite may regulate neuronal migration independently of PCP molecules. We show that trilobite mediates polarization of distinct movement behaviours. During gastrulation convergence and extension movements, trilobite regulates mediolateral cell polarity underlying effective intercalation and directed dorsal migration at increasing velocities. In the hindbrain, trilobite controls effective migration of branchiomotor neurons towards posterior rhombomeres. Mosaic analyses show trilobite functions cell-autonomously and non-autonomously in gastrulae and the hindbrain. We propose Trilobite/Stbm mediates cellular interactions that confer directionality on distinct movements during vertebrate embryogenesis.
Genes / Markers
Figures
Show all Figures
Expression
Phenotype
Mutation and Transgenics
Human Disease / Model Data
Sequence Targeting Reagents
Fish
Antibodies
Orthology
Engineered Foreign Genes
Mapping
Errata and Notes