Correction to: Nature Microbiology https://doi.org/10.1038/s41564-019-0603-6, published online 21 November 2019.

In the version of this Letter originally published, the author Grant J. Jensen was mistakenly affiliated with Zhengzhou University. His affiliation has now been corrected to: Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA and Howard Hughes Medical Institute, Pasadena, CA, USA.