Correction to: Nature Immunology https://doi.org/10.1038/ni.3008, published online 5 October 2014.

In the version of this article initially published, due to a copy / paste error during figure preparation, in Fig. 7f, the WT plot was an inadvertent duplicate of the adjacent R510G,R579G plot. Due to the age of the article, the figure cannot be updated directly. The corrected Fig. 7f is available as Supplementary Information accompanying this amendment. This notice serves to correct the article.