{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,22]],"date-time":"2026-08-22T22:19:55Z","timestamp":1787437195215,"version":"build-2736575974"},"reference-count":76,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2023,2,6]],"date-time":"2023-02-06T00:00:00Z","timestamp":1675641600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"FCT\/MCTES Portugal","award":["UIDB\/04046\/2020"],"award-info":[{"award-number":["UIDB\/04046\/2020"]}]},{"name":"FCT\/MCTES Portugal","award":["UIDP\/04046\/2020"],"award-info":[{"award-number":["UIDP\/04046\/2020"]}]},{"name":"FCT\/MCTES Portugal","award":["FARINH19I0"],"award-info":[{"award-number":["FARINH19I0"]}]},{"name":"FCT\/MCTES Portugal","award":["SFRH\/BD\/142857\/2018"],"award-info":[{"award-number":["SFRH\/BD\/142857\/2018"]}]},{"name":"FCT\/MCTES Portugal","award":["PD\/00065\/2012"],"award-info":[{"award-number":["PD\/00065\/2012"]}]},{"name":"Cystic Fibrosis Foundation","award":["UIDB\/04046\/2020"],"award-info":[{"award-number":["UIDB\/04046\/2020"]}]},{"name":"Cystic Fibrosis Foundation","award":["UIDP\/04046\/2020"],"award-info":[{"award-number":["UIDP\/04046\/2020"]}]},{"name":"Cystic Fibrosis Foundation","award":["FARINH19I0"],"award-info":[{"award-number":["FARINH19I0"]}]},{"name":"Cystic Fibrosis Foundation","award":["SFRH\/BD\/142857\/2018"],"award-info":[{"award-number":["SFRH\/BD\/142857\/2018"]}]},{"name":"Cystic Fibrosis Foundation","award":["PD\/00065\/2012"],"award-info":[{"award-number":["PD\/00065\/2012"]}]},{"name":"PhD fellowships","award":["UIDB\/04046\/2020"],"award-info":[{"award-number":["UIDB\/04046\/2020"]}]},{"name":"PhD fellowships","award":["UIDP\/04046\/2020"],"award-info":[{"award-number":["UIDP\/04046\/2020"]}]},{"name":"PhD fellowships","award":["FARINH19I0"],"award-info":[{"award-number":["FARINH19I0"]}]},{"name":"PhD fellowships","award":["SFRH\/BD\/142857\/2018"],"award-info":[{"award-number":["SFRH\/BD\/142857\/2018"]}]},{"name":"PhD fellowships","award":["PD\/00065\/2012"],"award-info":[{"award-number":["PD\/00065\/2012"]}]},{"name":"BioSys PhD programme","award":["UIDB\/04046\/2020"],"award-info":[{"award-number":["UIDB\/04046\/2020"]}]},{"name":"BioSys PhD programme","award":["UIDP\/04046\/2020"],"award-info":[{"award-number":["UIDP\/04046\/2020"]}]},{"name":"BioSys PhD programme","award":["FARINH19I0"],"award-info":[{"award-number":["FARINH19I0"]}]},{"name":"BioSys PhD programme","award":["SFRH\/BD\/142857\/2018"],"award-info":[{"award-number":["SFRH\/BD\/142857\/2018"]}]},{"name":"BioSys PhD programme","award":["PD\/00065\/2012"],"award-info":[{"award-number":["PD\/00065\/2012"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Cystic Fibrosis (CF) is a genetic disease caused by mutations in the gene encoding the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) channel. Currently, more than 2100 variants have been identified in the gene, with a large number being very rare. The approval of modulators that act on mutant CFTR protein, correcting its molecular defect and thus alleviating the burden of the disease, revolutionized the field of CF. However, these drugs do not apply to all patients with CF, especially those with rare mutations\u2014for which there is a lack of knowledge on the molecular mechanisms of the disease and the response to modulators. In this work, we evaluated the impact of several rare putative class II mutations on the expression, processing, and response of CFTR to modulators. Novel cell models consisting of bronchial epithelial cell lines expressing CFTR with 14 rare variants were created. The variants studied are localized at Transmembrane Domain 1 (TMD1) or very close to the signature motif of Nucleotide Binding Domain 1 (NBD1). Our data show that all mutations analyzed significantly decrease CFTR processing and while TMD1 mutations respond to modulators, those localized in NBD1 do not. Molecular modeling calculations confirm that the mutations in NBD1 induce greater destabilization of CFTR structure than those in TMD1. Furthermore, the structural proximity of TMD1 mutants to the reported binding site of CFTR modulators such as VX-809 and VX-661, make them more efficient in stabilizing the CFTR mutants analyzed. Overall, our data suggest a pattern for mutation location and impact in response to modulators that correlates with the global effect of the mutations on CFTR structure.<\/jats:p>","DOI":"10.3390\/ijms24043211","type":"journal-article","created":{"date-parts":[[2023,2,6]],"date-time":"2023-02-06T06:35:05Z","timestamp":1675665305000},"page":"3211","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Rescue of Rare CFTR Trafficking Mutants Highlights a Structural Location-Dependent Pattern for Correction"],"prefix":"10.3390","volume":"24","author":[{"given":"S\u00f3nia","family":"Zacarias","sequence":"first","affiliation":[{"name":"Biosystems and Integrative Sciences Institute, Faculty of Sciences, University of Lisboa, Campo Grande, 1749-016 Lisboa, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7727-9498","authenticated-orcid":false,"given":"Marta S. P.","family":"Batista","sequence":"additional","affiliation":[{"name":"Biosystems and Integrative Sciences Institute, Faculty of Sciences, University of Lisboa, Campo Grande, 1749-016 Lisboa, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7554-9802","authenticated-orcid":false,"given":"Sofia S.","family":"Ramalho","sequence":"additional","affiliation":[{"name":"Biosystems and Integrative Sciences Institute, Faculty of Sciences, University of Lisboa, Campo Grande, 1749-016 Lisboa, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6472-5700","authenticated-orcid":false,"given":"Bruno L.","family":"Victor","sequence":"additional","affiliation":[{"name":"Biosystems and Integrative Sciences Institute, Faculty of Sciences, University of Lisboa, Campo Grande, 1749-016 Lisboa, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5467-1710","authenticated-orcid":false,"given":"Carlos M.","family":"Farinha","sequence":"additional","affiliation":[{"name":"Biosystems and Integrative Sciences Institute, Faculty of Sciences, University of Lisboa, Campo Grande, 1749-016 Lisboa, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,2,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"231","DOI":"10.1016\/j.molmed.2007.05.001","article-title":"Cystic fibrosis: A disease of vulnerability to airway surface dehydration","volume":"13","author":"Boucher","year":"2007","journal-title":"Trends Mol. 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