Exocyst-mediated membrane trafficking of the lissencephaly-associated ECM receptor dystroglycan is required for proper brain compartmentalization
Abstract
To assemble a brain, differentiating neurons must make proper connections and establish specialized brain compartments. Abnormal levels of cell adhesion molecules disrupt these processes. Dystroglycan (Dg) is a major non-integrin cell adhesion receptor, deregulation of which is associated with dramatic neuroanatomical defects such as lissencephaly type II, or cobblestone brain. The previously established Drosophila model for cobblestone encephaly was used to understand how Dg is regulated in the brain. During development, Dg has a spatiotemporally dynamic expression pattern, fine-tuning of which is crucial for accurate brain assembly. In addition, mass spectrometry analyses identified numerous components associated with Dg in neurons, including several proteins of the exocyst complex. Data show that exocyst-based membrane trafficking of Dg allows its distinct expression pattern, essential for proper brain morphogenesis. Further studies of the Dg neuronal interactome will allow identification of new factors involved in the development of dystroglycanopathies and advance disease diagnostics in humans.
Data availability
The authors declare that all data supporting the findings of this study are available within the article and its supplementary information files or found on the Dryad Digital Repository (Data DOI: doi:10.5061/dryad.8sf7m0cmf).
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Neuronal Dystroglycan InteractomeDryad Digital Repository, doi:10.5061/dryad.8sf7m0cmf.
Article and author information
Author details
Funding
EMBO (YIP)
- Halyna R Shcherbata
VW Stiftung (AZN3008)
- Halyna R Shcherbata
Hannover Medical School
- Halyna R Shcherbata
VW Stiftung (AZ97750)
- Halyna R Shcherbata
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Copyright
© 2021, Yatsenko et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
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