After publication of this article [1], it was noticed there was an error in the Methods section under the subsection: Availability of supporting data.

The text including the error is as follows: “Coordinates and structure factors have been deposited in the Protein Data Bank with accession numbers 4ZXK, 4C1W and 4CIX for the apo structure, the 31SL complex and the 61SL complex, respectively.” Instead of 4CIX, it should read 4C1X.

This error has since been updated in the article [1].