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Atg6UVRAGVps34-Containing Lipid Kinase Complex Is Required for Receptor Downregulation through Endolysosomal Degradation and Epithelial Polarity during Drosophila Wing Development
Joint Authors
Lőrincz, Péter
Lakatos, Zsolt
Maruzs, Tamás
Sass, Miklós
Kis, Viktor
Szatmári, Zsuzsanna
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-19, 19 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-05-21
Country of Publication
Egypt
No. of Pages
19
Main Subjects
Abstract EN
Atg6 (Beclin 1 in mammals) is a core component of the Vps34 PI3K (III) complex, which promotes multiple vesicle trafficking pathways.
Atg6 and Vps34 form two distinct PI3K (III) complexes in yeast and mammalian cells, either with Atg14 or with UVRAG.
The functions of these two complexes are not entirely clear, as both Atg14 and UVRAG have been suggested to regulate both endocytosis and autophagy.
In this study, we performed a microscopic analysis of UVRAG, Atg14, or Atg6 loss-of-function cells in the developing Drosophila wing.
Both autophagy and endocytosis are seriously impaired and defective endolysosomes accumulate upon loss of Atg6.
We show that Atg6 is required for the downregulation of Notch and Wingless signaling pathways; thus it is essential for normal wing development.
Moreover, the loss of Atg6 impairs cell polarity.
Atg14 depletion results in autophagy defects with no effect on endocytosis or cell polarity, while the silencing of UVRAG phenocopies all but the autophagy defect of Atg6 depleted cells.
Thus, our results indicate that the UVRAG-containing PI3K (III) complex is required for receptor downregulation through endolysosomal degradation and for the establishment of proper cell polarity in the developing wing, while the Atg14-containing complex is involved in autophagosome formation.
American Psychological Association (APA)
Lőrincz, Péter& Lakatos, Zsolt& Maruzs, Tamás& Szatmári, Zsuzsanna& Kis, Viktor& Sass, Miklós. 2014. Atg6UVRAGVps34-Containing Lipid Kinase Complex Is Required for Receptor Downregulation through Endolysosomal Degradation and Epithelial Polarity during Drosophila Wing Development. BioMed Research International،Vol. 2014, no. 2014, pp.1-19.
https://search.emarefa.net/detail/BIM-503299
Modern Language Association (MLA)
Lőrincz, Péter…[et al.]. Atg6UVRAGVps34-Containing Lipid Kinase Complex Is Required for Receptor Downregulation through Endolysosomal Degradation and Epithelial Polarity during Drosophila Wing Development. BioMed Research International No. 2014 (2014), pp.1-19.
https://search.emarefa.net/detail/BIM-503299
American Medical Association (AMA)
Lőrincz, Péter& Lakatos, Zsolt& Maruzs, Tamás& Szatmári, Zsuzsanna& Kis, Viktor& Sass, Miklós. Atg6UVRAGVps34-Containing Lipid Kinase Complex Is Required for Receptor Downregulation through Endolysosomal Degradation and Epithelial Polarity during Drosophila Wing Development. BioMed Research International. 2014. Vol. 2014, no. 2014, pp.1-19.
https://search.emarefa.net/detail/BIM-503299
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-503299