| Structural highlights
Disease
CFTR_HUMAN Defects in CFTR are the cause of cystic fibrosis (CF) [MIM:219700; also known as mucoviscidosis. CF is the most common genetic disease in the Caucasian population, with a prevalence of about 1 in 2'000 live births. Inheritance is autosomal recessive. CF is a common generalized disorder of exocrine gland function which impairs clearance of secretions in a variety of organs. It is characterized by the triad of chronic bronchopulmonary disease (with recurrent respiratory infections), pancreatic insufficiency (which leads to malabsorption and growth retardation) and elevated sweat electrolytes.[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [40] [41] [42] [43] [44] [45] [46] Defects in CFTR are the cause of congenital bilateral absence of the vas deferens (CBAVD) [MIM:277180. CBAVD is an important cause of sterility in men and could represent an incomplete form of cystic fibrosis, as the majority of men suffering from cystic fibrosis lack the vas deferens.[47] [48] [49] [50] [:]
Function
CFTR_HUMAN Involved in the transport of chloride ions. May regulate bicarbonate secretion and salvage in epithelial cells by regulating the SLC4A7 transporter. Can inhibit the chloride channel activity of ANO1.[51]
Publication Abstract from PubMed
Many disease-causing mutations impair protein stability. Here, we explore a thermodynamic strategy to correct the disease-causing F508del mutation in the human cystic fibrosis transmembrane conductance regulator (hCFTR). F508del destabilizes nucleotide-binding domain 1 (hNBD1) in hCFTR relative to an aggregation-prone intermediate. We developed a fluorescence self-quenching assay for compounds that prevent aggregation of hNBD1 by stabilizing its native conformation. Unexpectedly, we found that dTTP and nucleotide analogs with exocyclic methyl groups bind to hNBD1 more strongly than ATP and preserve electrophysiological function of full-length F508del-hCFTR channels at temperatures up to 37 degrees C. Furthermore, nucleotides that increase open-channel probability, which reflects stabilization of an interdomain interface to hNBD1, thermally protect full-length F508del-hCFTR even when they do not stabilize isolated hNBD1. Therefore, stabilization of hNBD1 itself or of one of its interdomain interfaces by a small molecule indirectly offsets the destabilizing effect of the F508del mutation on full-length hCFTR. These results indicate that high-affinity binding of a small molecule to a remote site can correct a disease-causing mutation. We propose that the strategies described here should be applicable to identifying small molecules to help manage other human diseases caused by mutations that destabilize native protein conformation.
Ligand binding to a remote site thermodynamically corrects the F508del mutation in the human cystic fibrosis transmembrane conductance regulator.,Wang C, Aleksandrov AA, Yang Z, Forouhar F, Proctor EA, Kota P, An J, Kaplan A, Khazanov N, Boel G, Stockwell BR, Senderowitz H, Dokholyan NV, Riordan JR, Brouillette CG, Hunt JF J Biol Chem. 2018 Jun 14. pii: RA117.000819. doi: 10.1074/jbc.RA117.000819. PMID:29903914[52]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
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- ↑ Petreska L, Plaseska D, Koceva S, Stavljenic-Rukavina A, Efremov GD. A novel mutation in exon 12 (Y569C) of the CFTR gene identified in a patient of Croatian origin. Hum Mutat. 1996;7(4):374-5. PMID:8723693 doi:10.1002/humu.1380070402
- ↑ Bienvenu T, Chertkoff L, Beldjord C, Segal E, Carniglia L, Barreiro C, Kaplan JC. Identification of three novel mutations in the cystic fibrosis transmembrane conductance regulator gene in Argentinian CF patients. Hum Mutat. 1996;7(4):376-7. PMID:8723695 doi:<376::AID-HUMU18>3.0.CO;2-# 10.1002/(SICI)1098-1004(1996)7:4<376::AID-HUMU18>3.0.CO;2-#
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- ↑ Clavel C, Pennaforte F, Pigeon F, Verlingue C, Birembaut P, Ferec C. Identification of four novel mutations in the cystic fibrosis transmembrane conductance regulator gene: E664X, 2113delA, 306delTAGA, and delta M1140. Hum Mutat. 1997;9(4):368-9. PMID:9101301 doi:<368::AID-HUMU13>3.0.CO;2-0 10.1002/(SICI)1098-1004(1997)9:4<368::AID-HUMU13>3.0.CO;2-0
- ↑ Gouya L, Pascaud O, Munck A, Elion J, Denamur E. Novel mutation (A141D) in exon 4 of the CFTR gene identified in an Algerian patient. Hum Mutat. 1997;10(1):86-7. PMID:9222768 doi:<86::AID-HUMU15>3.0.CO;2-W 10.1002/(SICI)1098-1004(1997)10:1<86::AID-HUMU15>3.0.CO;2-W
- ↑ Casals T, Pacheco P, Barreto C, Gimenez J, Ramos MD, Pereira S, Pinheiro JA, Cobos N, Curvelo A, Vazquez C, Rocha H, Seculi JL, Perez E, Dapena J, Carrilho E, Duarte A, Palacio AM, Nunes V, Lavinha J, Estivill X. Missense mutation R1066C in the second transmembrane domain of CFTR causes a severe cystic fibrosis phenotype: study of 19 heterozygous and 2 homozygous patients. Hum Mutat. 1997;10(5):387-92. PMID:9375855 doi:<387::AID-HUMU9>3.0.CO;2-C 10.1002/(SICI)1098-1004(1997)10:5<387::AID-HUMU9>3.0.CO;2-C
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- ↑ Bombieri C, Benetazzo M, Saccomani A, Belpinati F, Gile LS, Luisetti M, Pignatti PF. Complete mutational screening of the CFTR gene in 120 patients with pulmonary disease. Hum Genet. 1998 Dec;103(6):718-22. PMID:9921909
- ↑ Vankeerberghen A, Wei L, Jaspers M, Cassiman JJ, Nilius B, Cuppens H. Characterization of 19 disease-associated missense mutations in the regulatory domain of the cystic fibrosis transmembrane conductance regulator. Hum Mol Genet. 1998 Oct;7(11):1761-9. PMID:9736778
- ↑ Malone G, Haworth A, Schwarz MJ, Cuppens H, Super M. Detection of five novel mutations of the cystic fibrosis transmembrane regulator (CFTR) gene in Pakistani patients with cystic fibrosis: Y569D, Q98X, 296+12(T>C), 1161delC and 621+2(T>C). Hum Mutat. 1998;11(2):152-7. PMID:9482579 doi:<152::AID-HUMU8>3.0.CO;2-L 10.1002/(SICI)1098-1004(1998)11:2<152::AID-HUMU8>3.0.CO;2-L
- ↑ Leoni GB, Pitzalis S, Tonelli R, Cao A. Identification of a novel mutation (S13F) in the CFTR gene in a CF patient of Sardinian origin. Hum Mutat. 1998;11(4):337. PMID:9554753
- ↑ Feldmann D, Sardet A, Cougoureux E, Plouvier E, Fontaine JL, Tournier G, Aymard P. Identification of three novel mutations in the CFTR gene, R117P, deltaD192, and 3121-1G-->A in four French patients. Hum Mutat. 1998;Suppl 1:S78-80. PMID:9452048
- ↑ Casals T, Ramos MD, Gimenez J, Nadal M, Nunes V, Estivill X. Paternal origin of a de novo novel CFTR mutation (L1065R) causing cystic fibrosis. Hum Mutat. 1998;Suppl 1:S99-102. PMID:9452054
- ↑ Shackleton S, Harris A. A 2-amino acid insertion mutation (1243insACAAAA) in exon 7 of the CFTR gene. Hum Mutat. 1998;Suppl 1:S156-7. PMID:9452073
- ↑ Picci L, Cameran M, Olante P, Zacchello F, Scarpa M. Identification of a D579G homozygote cystic fibrosis patient with pancreatic sufficiency and minor lung involvement. Mutations in brief no. 221. Online. Hum Mutat. 1999;13(2):173. PMID:10094564 doi:<173::AID-HUMU19>3.0.CO;2-E 10.1002/(SICI)1098-1004(1999)13:2<173::AID-HUMU19>3.0.CO;2-E
- ↑ Mercier B, Verlingue C, Lissens W, Silber SJ, Novelli G, Bonduelle M, Audrezet MP, Ferec C. Is congenital bilateral absence of vas deferens a primary form of cystic fibrosis? Analyses of the CFTR gene in 67 patients. Am J Hum Genet. 1995 Jan;56(1):272-7. PMID:7529962
- ↑ Jezequel P, Dorval I, Fergelot P, Chauvel B, Le Treut A, Le Gall JY, Le Lannou D, Blayau M. Structural analysis of CFTR gene in congenital bilateral absence of vas deferens. Clin Chem. 1995 Jun;41(6 Pt 1):833-5. PMID:7539342
- ↑ Zielenski J, Patrizio P, Markiewicz D, Asch RH, Tsui LC. Identification of two mutations (S50Y and 4173delC) in the CFTR gene from patients with congenital bilateral absence of vas deferens (CBAVD). Hum Mutat. 1997;9(2):183-4. PMID:9067761 doi:<183::AID-HUMU13>3.0.CO;2-Z 10.1002/(SICI)1098-1004(1997)9:2<183::AID-HUMU13>3.0.CO;2-Z
- ↑ Bienvenu T, Bousquet S, Vidaud D, Hubert D, Francoual C, Beldjord C, Kaplan JC. A novel missense mutation D513G in exon 10 of the cystic fibrosis transmembrane conductance regulator (CFTR) gene identified in a French CBAVD patient. Mutations in brief no. 175. Online. Hum Mutat. 1998;12(3):213-4. PMID:10651488
- ↑ Ousingsawat J, Kongsuphol P, Schreiber R, Kunzelmann K. CFTR and TMEM16A are separate but functionally related Cl- channels. Cell Physiol Biochem. 2011;28(4):715-24. doi: 10.1159/000335765. Epub 2011 Dec, 14. PMID:22178883 doi:10.1159/000335765
- ↑ Wang C, Aleksandrov AA, Yang Z, Forouhar F, Proctor EA, Kota P, An J, Kaplan A, Khazanov N, Boel G, Stockwell BR, Senderowitz H, Dokholyan NV, Riordan JR, Brouillette CG, Hunt JF. Ligand binding to a remote site thermodynamically corrects the F508del mutation in the human cystic fibrosis transmembrane conductance regulator. J Biol Chem. 2018 Jun 14. pii: RA117.000819. doi: 10.1074/jbc.RA117.000819. PMID:29903914 doi:https://dx.doi.org/10.1074/jbc.RA117.000819
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