Correction to: Nature Communications https://doi.org/10.1038/s41467-019-13234-x, published online 20 November 2019.

The original version of this Article contained an error in the Data Availability statement. The accession code for the X-ray structural data of DQ6-HCRT56-69 incorrectly stated ‘PDB ID: 6GIG ‘. The correct version reads ‘PDB ID: 6DIG’.

This has now been corrected in both the PDF and HTML versions of the Article.