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Epilepsy- and intellectual disability-associated CYFIP2 interacts with both actin regulators and RNA-binding proteins in the neonatal mouse forebrain
- Source :
- Biochemical and Biophysical Research Communications. 529:1-6
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Variants of the cytoplasmic FMR1-interacting protein 2 (CYFIP2) gene are associated with early-onset epileptic encephalopathy, intellectual disability, and developmental delay. However, the current understanding of the molecular functions of CYFIP2 is limited to those related to actin dynamics, and thus, the detailed mechanisms of CYFIP2-associated brain disorders remain largely unknown. Here, we isolated the neonatal forebrain CYFIP2 complex using newly generated Cyfip2-3×Flag knock-in mice, and performed mass spectrometry-based analyses to identify proteins in the complex. The CYFIP2 interactome, consisting of 140 proteins, contained not only the expected actin regulators but also 25 RNA-binding proteins (RBPs) including Argonaute proteins. Functionally, overexpression of brain disorder-associated CYFIP2 R87 variants, but not wild-type, inhibited stress granule formation in HeLa cells. Mechanistically, the CYFIP2 R87 variants formed intracellular clusters with Argonaute proteins under both basal and stress conditions, and thereby possibly preventing their assembly into stress granules. Beyond identifying CYFIP2 interactors in vivo, these results may provide novel insights for better understanding the molecular mechanisms of CYFIP2-associated brain disorders.
- Subjects :
- 0301 basic medicine
Biophysics
Mice, Transgenic
RNA-binding protein
Biology
Biochemistry
Interactome
Mice
03 medical and health sciences
Prosencephalon
0302 clinical medicine
Stress granule
Intellectual Disability
Animals
Humans
Protein Interaction Maps
Molecular Biology
Actin
Adaptor Proteins, Signal Transducing
Epilepsy
Genetic Variation
RNA-Binding Proteins
Cell Biology
Argonaute
Actins
Cell biology
Disease Models, Animal
030104 developmental biology
Animals, Newborn
Cytoplasm
030220 oncology & carcinogenesis
CYFIP2
Forebrain
HeLa Cells
Subjects
Details
- ISSN :
- 0006291X
- Volume :
- 529
- Database :
- OpenAIRE
- Journal :
- Biochemical and Biophysical Research Communications
- Accession number :
- edsair.doi.dedup.....48857cdf37cb052a5ac71659398d38c8