2017年4月
Extracellular Signals Induce Glycoprotein M6a Clustering of Lipid Rafts and Associated Signaling Molecules
JOURNAL OF NEUROSCIENCE
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- 巻
- 37
- 号
- 15
- 開始ページ
- 4046
- 終了ページ
- 4064
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1523/JNEUROSCI.3319-16.2017
- 出版者・発行元
- SOC NEUROSCIENCE
Lipid raft domains, where sphingolipids and cholesterol are enriched, concentrate signaling molecules. Toexaminehowsignaling protein complexes are clustered in rafts, we focused on the functions of glycoprotein M6a (GPM6a), which is expressed at a high concentration in developing mouse neurons. Using imaging of lipid rafts, we found that GPM6a congregated in rafts in a GPM6a palmitoylation-dependent manner, thereby contributing to lipid raft clustering. In addition, we found that signaling proteins downstream of GPM6a, such as Rufy3, Rap2, and Tiam2/STEF, accumulated in lipid rafts in a GPM6a-dependent manner and were essential for laminin-dependent polarity during neurite formation in neuronal development. In utero RNAi targeting of GPM6a resulted in abnormally polarized neurons with multiple neurites. These results demonstrate that GPM6a induces the clustering of lipid rafts, which supports the raft aggregation of its associated downstream molecules for acceleration of neuronal polarity determination. Therefore, GPM6a acts as a signal transducer that responds to extracellular signals.
- リンク情報
- ID情報
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- DOI : 10.1523/JNEUROSCI.3319-16.2017
- ISSN : 0270-6474
- PubMed ID : 28275160
- Web of Science ID : WOS:000399440400007