Nat. Cell Biol. 15, 461–471 (2013); published online 7 April 2013; corrected after print 4 July 2014

In the version of this Article originally published, an error in the journal production process led to the wrong image being used for 'SNX27KD' in Fig. 4b. The correct image is shown below and is corrected in all online versions of the Article.