Variant NM_000492.4:c.1647T>G


Variant details:
Name NM_000492.4:c.1647T>G
Protein name NP_000483.3:p.(Ser549Arg)
Genomic name (hg19) chr7:g.117227855T>G    UCSC    
#Exon/intron exon 12
Legacy Name S549R(T>G)
Class disease-causing
Subclass CF-causing
WT sequence TTGGAGAAGGTGGAATCACACTGAG T GGAGGTCAACGAGCAAGAATTTCTT
Mutant sequence TTGGAGAAGGTGGAATCACACTGAG G GGAGGTCAACGAGCAAGAATTTCTT

Other databases:
dbSNP
rs121909005



Pathogenicity predictors:

Functional studies:


Reference PMID Splicing mRNA level Maturation Localization Channel fonction (Cl-) Bicarbonate
Gregory et al, 1991 1712898 ✓ ✓
Yu et al, 2012 22293084 ✓ ✓ ✓
Sosnay et al, 2013 23974870 ✓ ✓


« ✓ » indicates the type of analysis performed and not the results


Response to modulators:


Modulator FDA approval EMA approval in vitro / ex vivo data clinical data
IVA yes yesno yes
TEZ-IVA yesnoyesno
ELX-TEZ-IVA yesnoyesno


clinical and functional data are provided by Vertex


No patient found in CFTR-NGS catalogue


4 patients carrying this variant are reported in CFTR-France:

TOTAL NUMBER OF PATIENTS 4
CF 4




Color code:   non disease-causing <   likely benign <   VUS <   likely pathogenic <   disease-causing

Detailed genotypes:
Phenotype Patient ID Variant status Additional variants
CF 131heterozygoteVUS3 - Cis
CF-causing - Trans
CF 392heterozygoteVUS3 - Cis
varying clinical consequence - Trans
CF 3275heterozygoteCF-causing - Trans
VUS3- Undef
CF 4167heterozygoteCF-causing- Undef


Color code:   non disease-causing <   likely benign <   VUS <   likely pathogenic <   disease-causing



            CFTR variants are clustered into five groups:
  • CF-causing: when in trans with another CF-causing mutation, will result in CF.
  • CFTR-RD causing: when in trans with a CF-causing mutation, will result in CFTR-related disorders (CFTR-RD) such as chronic pancreatitis, bronchiectasis, CRS-NP (chronic rhinosinusitis with or without nasal polyposis) or CBAVD (congenital absence of vas deferens), according to Bombieri C et al., 2011.
  • Varying clinical consequence: when in trans with another CF-causing mutation, can either result in CF or in a CFTR-RD.
  • Non disease-causing: when in trans with a CF-causing mutation, will not cause CF, nor CFTR-RD.
  • VUS (Variant of unknown clinical significance): unclassified because of insufficient data.



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