Nature Cell Biology 18, 1173–1184 (2016); published online 17 October 2016; corrected after print 18 November 2016.

In the version of this Article originally published, the name of co-author Eduardo Cebollero Presmanes was coded wrongly resulting in it being incorrect when exported to citation databases. This has been corrected and the co-author's name now appears as 'Eduardo Cebollero' in the online versions of the Article.