eLife assessment
This study uncovers a unique feature of the nucleotide binding domain interface in human CFTR, offering valuable insights into the effects of different non-hydrolytic mutations on CFTR gating. While the evidence presented is solid, a more thorough examination of the non-hydrolytic mutants of zebrafish CFTR for comparison would strengthen the authors' claims. In the current form, more cautious interpretations of some of the data are needed. This study will be of interest to researchers in the fields of cystic fibrosis and proteins in the ATP Binding Cassette (ABC) transporter family.