ABCC7 p.Pro5Leu
| ClinVar: |
c.14C>T
,
p.Pro5Leu
D
, Likely pathogenic
|
| CF databases: |
c.14C>T
,
p.Pro5Leu
(CFTR1)
D
, This mutation was detected by SSCP analysis, followed by direct sequencing. Mutation P5L was found in 1/50 unrelated Spanish CF non-[delta]F508 chromosomes.
|
| Predicted by SNAP2: | A: D (53%), C: N (53%), D: D (66%), E: D (71%), F: D (71%), G: D (66%), H: D (63%), I: D (63%), K: D (71%), L: D (66%), M: D (59%), N: D (59%), Q: D (53%), R: D (71%), S: D (53%), T: D (53%), V: D (63%), W: D (71%), Y: D (66%), |
| Predicted by PROVEAN: | A: D, C: D, D: D, E: D, F: D, G: D, H: D, I: D, K: D, L: D, M: D, N: D, Q: D, R: D, S: D, T: D, V: D, W: D, Y: D, |
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[hide] Direct interaction with filamins modulates the sta... J Clin Invest. 2007 Feb;117(2):364-74. Epub 2007 Jan 18. Thelin WR, Chen Y, Gentzsch M, Kreda SM, Sallee JL, Scarlett CO, Borchers CH, Jacobson K, Stutts MJ, Milgram SL
Direct interaction with filamins modulates the stability and plasma membrane expression of CFTR.
J Clin Invest. 2007 Feb;117(2):364-74. Epub 2007 Jan 18., [PMID:17235394]
Abstract [show]
The role of the cystic fibrosis transmembrane conductance regulator (CFTR) as a cAMP-dependent chloride channel on the apical membrane of epithelia is well established. However, the processes by which CFTR is regulated on the cell surface are not clear. Here we report the identification of a protein-protein interaction between CFTR and the cytoskeletal filamin proteins. Using proteomic approaches, we identified filamins as proteins that associate with the extreme CFTR N terminus. Furthermore, we identified a disease-causing missense mutation in CFTR, serine 13 to phenylalanine (S13F), which disrupted this interaction. In cells, filamins tethered plasma membrane CFTR to the underlying actin network. This interaction stabilized CFTR at the cell surface and regulated the plasma membrane dynamics and confinement of the channel. In the absence of filamin binding, CFTR was internalized from the cell surface, where it prematurely accumulated in lysosomes and was ultimately degraded. Our data demonstrate what we believe to be a previously unrecognized role for the CFTR N terminus in the regulation of the plasma membrane stability and metabolic stability of CFTR. In addition, we elucidate the molecular defect associated with the S13F mutation.
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No. Sentence Comment
42 Using the CF mutations database (http://www.genet.sickkids.on.ca/cftr), we identified 3 previously described missense mutations in the extreme N terminus of CFTR: proline 5 to leucine (P5L), serine 13 to phenylalanine (S13F), and tryptophan 19 to cysteine (W19C) (31, 32).
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ABCC7 p.Pro5Leu 17235394:42:163
status: NEW[hide] The CFTR frameshift mutation 3905insT and its effe... Eur J Hum Genet. 2010 Feb;18(2):212-7. Epub 2009 Sep 2. Sanz J, von Kanel T, Schneider M, Steiner B, Schaller A, Gallati S
The CFTR frameshift mutation 3905insT and its effect at transcript and protein level.
Eur J Hum Genet. 2010 Feb;18(2):212-7. Epub 2009 Sep 2., [PMID:19724303]
Abstract [show]
Cystic fibrosis (CF) is one of the most common genetic diseases in the Caucasian population and is characterized by chronic obstructive pulmonary disease, exocrine pancreatic insufficiency, and elevation of sodium and chloride concentrations in the sweat and infertility in men. The disease is caused by mutations in the CF transmembrane conductance regulator (CFTR) gene, which encodes a protein that functions as chloride channel at the apical membrane of different epithelia. Owing to the high genotypic and phenotypic disease heterogeneity, effects and consequences of the majority of the CFTR mutations have not yet been studied. Recently, the frameshift mutation 3905insT was identified as the second most frequent mutation in the Swiss population and found to be associated with a severe phenotype. The frameshift mutation produces a premature termination codon (PTC) in exon 20, and transcripts bearing this PTC are potential targets for degradation through nonsense-mediated mRNA decay (NMD) and/or for exon skipping through nonsense-associated alternative splicing (NAS). Using RT-PCR analysis in lymphocytes and different tissue types from patients carrying the mutation, we showed that the PTC introduced by the mutation does neither elicit a degradation of the mRNA through NMD nor an alternative splicing through NAS. Moreover, immunocytochemical analysis in nasal epithelial cells revealed a significantly reduced amount of CFTR at the apical membrane providing a possible molecular explanation for the more severe phenotype observed in F508del/3905insT compound heterozygotes compared with F508del homozygotes. However, further experiments are needed to elucidate the fate of the 3905insT CFTR in the cell after its biosynthesis.
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No. Sentence Comment
26 Two patients carried the 3905insT (c.3773_3774insT) mutation on one allele and the P5L (p.Pro5Leu) or the Q39X (p.Gln39X) mutation, respectively, on the other allele.
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ABCC7 p.Pro5Leu 19724303:26:90
status: NEW[hide] A Genotypic-Oriented View of CFTR Genetics Highlig... Mol Med. 2015 Apr 21;21:257-75. doi: 10.2119/molmed.2014.00229. Lucarelli M, Bruno SM, Pierandrei S, Ferraguti G, Stamato A, Narzi F, Amato A, Cimino G, Bertasi S, Quattrucci S, Strom R
A Genotypic-Oriented View of CFTR Genetics Highlights Specific Mutational Patterns Underlying Clinical Macrocategories of Cystic Fibrosis.
Mol Med. 2015 Apr 21;21:257-75. doi: 10.2119/molmed.2014.00229., [PMID:25910067]
Abstract [show]
Cystic fibrosis (CF) is a monogenic disease caused by mutations of the cystic fibrosis transmembrane conductance regulator (CFTR) gene. The genotype-phenotype relationship in this disease is still unclear, and diagnostic, prognostic and therapeutic challenges persist. We enrolled 610 patients with different forms of CF and studied them from a clinical, biochemical, microbiological and genetic point of view. Overall, there were 125 different mutated alleles (11 with novel mutations and 10 with complex mutations) and 225 genotypes. A strong correlation between mutational patterns at the genotypic level and phenotypic macrocategories emerged. This specificity appears to largely depend on rare and individual mutations, as well as on the varying prevalence of common alleles in different clinical macrocategories. However, 19 genotypes appeared to underlie different clinical forms of the disease. The dissection of the pathway from the CFTR mutated genotype to the clinical phenotype allowed to identify at least two components of the variability usually found in the genotype-phenotype relationship. One component seems to depend on the genetic variation of CFTR, the other component on the cumulative effect of variations in other genes and cellular pathways independent from CFTR. The experimental dissection of the overall biological CFTR pathway appears to be a powerful approach for a better comprehension of the genotype-phenotype relationship. However, a change from an allele-oriented to a genotypic-oriented view of CFTR genetics is mandatory, as well as a better assessment of sources of variability within the CFTR pathway.
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No. Sentence Comment
362 Allele legacy name Allele HGVS name Clinical classification CFTR2 M1V c.1A>G CF-PI CF-causing p.Met1Val P5L c.14C>T CF-PS,CFTR-RD nd p.Pro5Leu ex2,3del c.54-5940_273+10250del21080 CF-PI CF-causing ex2del c.54-1161_164+1603del2875 CF-PI nd W19X(TAG) c.56G>A CF-PI nd p.Trp19* [L24F;296+2T>G] c.
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ABCC7 p.Pro5Leu 25910067:362:135
status: NEW