Variant NM_000492.4:c.164G>A


Variant details:
Name NM_000492.4:c.164G>A
Protein name NP_000483.3:p.(Arg55Lys)
Genomic name (hg19)     chr7:g.117144417G>A    UCSC    
Genomic name (hg38) chr7:g.117504363G>A    UCSC
#Exon/intron exon 2
Legacy Name R55K
Class VUS
Subclass VUS
WT sequence GACAATCTATCTGAAAAATTGGAAA G GTATGTTCATGTACATTGTTTAGTT
Mutant sequence GACAATCTATCTGAAAAATTGGAAA A GTATGTTCATGTACATTGTTTAGTT

Other databases:

Not found		dbSNP
no rs



Pathogenicity predictors:

Functional studies:


Reference PMID Splicing mRNA level Maturation Localization Channel fonction (Cl-) Bicarbonate
Bergougnoux et al, 2022 36567205 ✓ ✓ ✓ ✓ ✓


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



No patient found in CFTR-NGS catalogue


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

TOTAL NUMBER OF PATIENTS 1
CFTR-RD1
  • Bronchiectasis  1




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

Detailed genotypes:
Phenotype Patient ID Variant status Additional variants
Bronchiectasis 4233heterozygote


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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