Corrigendum
We were alerted by a post on Pubpeer that the image panel in Fig. 6A (transwell migration assay) contains several images that overlap with each other, even though they should represent independent experiments.
We deeply regret this misrepresentation of results in Fig. 6A. Upon inspection of archived raw data from 2008, when the experiments were conducted, we found that our archived images from this experiment are incomplete, and regretfully, we were not able to reconstruct how or why the faulty figure assembly had occurred.
Given the resulting lack of fullest confidence in the results shown in Fig. 6A, and by extension also in the associated quantification in Fig. 6B, we want to notify the readers that we wish to remove as a correction Fig. 6 and the corresponding paragraph in the Results section from the publication.
The removal of Fig. 6 has in our judgement no effect on the validity of other results and the conclusions of this study. The transwell migration assay of Fig. 6 was independent of other experiments and was in support of expression (Fig. 1), binding (Fig. 2), in vivo mutant mouse (Figs. 3–5), explant culture (Fig. 7), and supplemental data studies, which all stand by themselves as valid.
The authors would like to apologize for any inconvenience caused.