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  The Zebrafish Glypican Knypek Controls Cell Polarity during Gastrulation Movements of Convergent Extension

Topczewski, J., Sepich, D. S., Walker, C., & Hammerschmidt, M. (2001). The Zebrafish Glypican Knypek Controls Cell Polarity during Gastrulation Movements of Convergent Extension. Developmental Cell, 1(2), 251-264.

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 Creators:
Topczewski, Jacek, Author
Sepich, Diane S., Author
Walker, Charline, Author
Hammerschmidt, Matthias1, Author           
Affiliations:
1Georges Köhler Laboratory, Max Planck Institute of Immunobiology and Epigenetics, Max Planck Society, ou_2243653              

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 Abstract: Mutations in the zebrafish knypek locus impair gastrulation movements of convergent extension that narrow embryonic body and elongate it from head to tail. We demonstrate that knypek regulates cellular movements but not cell fate specification. Convergent extension movement defects in knypek are associated with abnormal cell polarity, as mutant cells fail to elongate and align medio-laterally. Positional cloning reveals that knypek encodes a member of the glypican family of heparan sulfate proteoglycans. Double mutant and overexpression analyses show that Knypek potentiates Wnt11 signaling, mediating convergent extension. These studies provide experimental and genetic evidence that glypican Knypek acts during vertebrate gastrulation as a positive modulator of noncanonical Wnt signaling to establish polarized cell behaviors underlying convergent extension movements.

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 Dates: 2001
 Publication Status: Issued
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 Rev. Type: -
 Identifiers: eDoc: 18312
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Title: Developmental Cell
Source Genre: Journal
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Pages: - Volume / Issue: 1 (2) Sequence Number: - Start / End Page: 251 - 264 Identifier: -