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Cytoplasmic FMR1-interacting protein 1

Definition:

Component of the CYFIP1-EIF4E-FMR1 complex which binds to the mRNA cap and mediates translational repression. In the CYFIP1-EIF4E-FMR1 complex this subunit is an adapter between EIF4E and FMR1. Promotes the translation repression activity of FMR1 in brain probably by mediating its association with EIF4E and mRNA (By similarity). Regulates formation of membrane ruffles and lamellipodia. Plays a role in axon outgrowth. Binds to F-actin but not to RNA. Part of the WAVE complex that regulates actin filament reorganization via its interaction with the Arp2/3 complex. Actin remodeling activity is regulated by RAC1. Regulator of epithelial morphogenesis. As component of the WAVE1 complex, required for BDNF-NTRK2 endocytic trafficking and signaling from early endosomes (By similarity). May act as an invasion suppressor in cancers.

References:

[1]. Jose M Silva, et al. Cyfip1 is a putative invasion suppressor in epithelial cancers. Cell. 2009 Jun 12;137(6):1047-61. [Content Brief]

[2]. Zhucheng Chen, et al. Structure and control of the actin regulatory WAVE complex. Nature. 2010 Nov 25;468(7323):533-8. [Content Brief]

[3]. K Kobayashi, et al. p140Sra-1 (specifically Rac1-associated protein) is a novel specific target for Rac1 small GTPase. J Biol Chem. 1998 Jan 2;273(1):291-5. [Content Brief]

[4]. Yoji Kawano, et al. CRMP-2 is involved in kinesin-1-dependent transport of the Sra-1/WAVE1 complex and axon formation. Mol Cell Biol. 2005 Nov;25(22):9920-35. [Content Brief]

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