Updates for c.4208G>A:
2026-06-05 Class updated from VUS to VUS non-CF (based on high frequency in the general population and patients data)




Variant NM_000492.4:c.4208G>A


Variant details:
Name NM_000492.4:c.4208G>A
Protein name NP_000483.3:p.(Arg1403Lys)
Genomic name (hg19)     chr7:g.117305584G>A    UCSC    
Genomic name (hg38) chr7:g.117665530G>A    UCSC
#Exon/intron exon 26
Legacy Name R1403K
Class VUS
Subclass non-CF
WT sequence TGCACAGTAATTCTCTGTGAACACA G GATAGAAGCAATGCTGGAATGCCAA
Mutant sequence TGCACAGTAATTCTCTGTGAACACA A GATAGAAGCAATGCTGGAATGCCAA

Other databases:

Not found
Not found		dbSNP
rs780396890



Pathogenicity predictors:



No patient found in CFTR-NGS catalogue

No patient found in CFTR-France




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

            CFTR variants are clustered into five groups (click here for more details about the classification of variants):
  • 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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