Correction to: Nature Chemical Biology; published online 26 February 2018.

In the version of this article originally published, the links and files for the Supplementary Information, including Supplementary Tables 1–5, Supplementary Figures 1–25, Supplementary Note, Supplementary Datasets 1–4 and the Life Sciences Reporting Summary, were missing in the HTML. The error has been corrected in the HTML version of this article.