RNA localization and co-translational interactions control RAB13 GTPase function and cell migration.
RNA localization and co-translational interactions control RAB13 GTPase function and cell migration.
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DOI：
10.15252/embj.2020104958
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发表时间：
2020-11-02
期刊：
影响因子：
--
通讯作者：
Mili S
中科院分区：
文献类型：
--
作者：
Moissoglu K;Stueland M;Gasparski AN;Wang T;Jenkins LM;Hastings ML;Mili S
Numerous RNAs exhibit specific distribution patterns in mammalian cells. However, the functional and mechanistic consequences are relatively unknown. Here, we investigate the functional role of RNA localization at cellular protrusions of migrating mesenchymal cells, using as a model the RAB13 RNA, which encodes a GTPase important for vesicle‐mediated membrane trafficking. While RAB13 RNA is enriched at peripheral protrusions, the expressed protein is concentrated perinuclearly. By specifically preventing RAB13 RNA localization, we show that peripheral RAB13 translation is not important for the overall distribution of the RAB13 protein or its ability to associate with membranes, but is required for full activation of the GTPase and for efficient cell migration. RAB13 translation leads to a co‐translational association of nascent RAB13 with the exchange factor RABIF. Our results indicate that RAB13‐RABIF association at the periphery is required for directing RAB13 GTPase activity to promote cell migration. Thus, translation of RAB13 in specific subcellular environments imparts the protein with distinct properties and highlights a means of controlling protein function through local RNA translation. Localization of mammalian RAB13 RNA at the cell periphery is required for RAB13 activation and mesenchymal cell migration, through co‐translational interaction with the exchange factor RABIF.
