Epilepsy- and intellectual disability-associated CYFIP2 interacts with both actin regulators and RNA-binding proteins in the neonatal mouse forebrain
| Autor: | Yoonhee Kim, Geul Bang, Kihoon Han, Chunmei Jin, Hyae Rim Kang, Hyojin Kang, Ruiying Ma, Yinhua Zhang, Yeunkum Lee, Jin Young Kim |
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| Rok vydání: | 2020 |
| Předmět: |
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 |
| Zdroj: | Biochemical and Biophysical Research Communications. 529:1-6 |
| ISSN: | 0006-291X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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