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GBF1 (Gartenzwerg)-dependent secretion is required for Drosophila tubulogenesis

Wang, Shuoshuo and Meyer, Heiko and Ochoa-Espinosa, Amanda and Buchwald, Ulf and Onel, Susanne and Altenhein, Benjamin and J. Heinisch, Jürgen and Affolter, Markus and Paululat, Achim. (2012) GBF1 (Gartenzwerg)-dependent secretion is required for Drosophila tubulogenesis. Journal of cell science, Vol. 125, H. 2. pp. 461-472.

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Official URL: http://edoc.unibas.ch/dok/A6002450

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Abstract

Here we report on the generation and in vivo analysis of a series of loss-of-function mutants for the Drosophila ArfGEF, Gartenzwerg. The Drosophila gene gartenzwerg (garz) encodes the orthologue of mammalian GBF1. garz is expressed ubiquitously in embryos with substantially higher abundance in cells forming diverse tubular structures such as salivary glands, trachea, proventriculus or hindgut. In the absence of functional Garz protein, the integrity of the Golgi complex is impaired. As a result, both vesicle transport of cargo proteins and directed apical membrane delivery are severely disrupted. Dysfunction of the Arf1-COPI machinery caused by a loss of Garz leads to perturbations in establishing a polarized epithelial architecture of tubular organs. Furthermore, insufficient apical transport of proteins and other membrane components causes incomplete luminal diameter expansion and deficiencies in extracellular matrix assembly. The fact that homologues of Garz are present in every annotated metazoan genome indicates that secretion processes mediated by the GBF-type ArfGEFs play a universal role in animal development.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Growth & Development > Cell Biology (Affolter)
UniBasel Contributors:Affolter, Markus
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Company of Biologists
ISSN:0021-9533
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:11 Oct 2012 15:31
Deposited On:11 Oct 2012 15:18

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