EB1-Binding–Myomegalin Protein Complex Promotes Centrosomal Microtubules Functions
EB1-binding–myomegalin protein complex promotes PNAS PLUS centrosomal microtubules functions Habib Bougueninaa, Danièle Salauna,1, Aurélie Mangona,1, Leslie Mullerb, Emilie Baudeleta, Luc Camoina, Taro Tachibanac, Sarah Cianféranib, Stéphane Audeberta, Pascal Verdier-Pinarda,2, and Ali Badachea,2 aCentre de Recherche en Cancérologie de Marseille (CRCM), INSERM, Institut Paoli-Calmettes, CNRS, Aix-Marseille Université,13009 Marseille, France; bLaboratoire de Spectrométrie de Masse BioOrganique, CNRS, Institut Pluridisciplinaire Hubert Curien UMR 7178, Université de Strasbourg, 67087 Strasbourg, France; and cDepartment of Bioengineering, Graduate School of Engineering, Osaka City University, Osaka 558-8585, Japan Edited by Andrew J. Holland, Johns Hopkins University Medical School, Baltimore, MD, and accepted by Editorial Board Member Tak W. Mak October 28, 2017 (received for review April 6, 2017) Control of microtubule dynamics underlies several fundamental investigating the mechanism through which the ErbB2 receptor processes such as cell polarity, cell division, and cell motility. To gain tyrosine kinase controls breast tumor cell motility, we character- insights into the mechanisms that control microtubule dynamics ized a signaling pathway whereby the ErbB2 effector Memo con- during cell motility, we investigated the interactome of the microtu- trols the relocalization to the plasma membrane of a protein bule plus-end–binding protein end-binding 1 (EB1). Via molecular complex comprising APC and ACF7 that captures and stabilizes mapping and cross-linking mass spectrometry we identified and char- MT plus-ends at the cell periphery (10–12), thereby regulating acterized a large complex associating a specific isoform of myomega- directed cell motility (13, 14). To further characterize the mech- “ ” lin termed SMYLE (for short myomegalin-like EB1 binding protein), anisms underlying MT capture, we aimed to define the MT plus- the PKA scaffolding protein AKAP9, and the pericentrosomal protein end–associated protein network by characterizing the EB1 inter- CDK5RAP2.
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