Data and code availability
The cryo-EM maps and atomic models have been deposited at the Electron Microscopy DataBank and the PDB with the accession codes listed in Table S3, and are publicly available as of the date of publication. Additional data needed to support the conclusion of this manuscript are included in the main text and supplementary materials. This paper does not report original code. Any additional information required to reanalyze the data reported in this paper is available from the lead contact upon request.