There was an error published in J. Cell Sci. 121, 3683-3692.

We apologise for an error that occurred in Fig. 1C of this article. The transmembrane region of the cytoplasmic truncation mutant is shown in red instead of blue. This error appeared in both the print and the online versions of this article.

The correct Fig. 1C is shown below.

We apologise for this mistake.