Variant NM_000492.4:c.228T>G


Variant details:
Name NM_000492.4:c.228T>G
Protein name NP_000483.3:p.(Cys76Trp)
Genomic name (hg19) chr7:g.117149151T>G    UCSC    gnomAD
#Exon/intron exon 3
Legacy Name C76W
Class VUS
Subclass VUS4
WT sequence AACTCATTAATGCCCTTCGGCGATG T TTTTTCTGGAGATTTATGTTCTATG
Mutant sequence AACTCATTAATGCCCTTCGGCGATG G TTTTTCTGGAGATTTATGTTCTATG


External sources:

Not found		dbSNP
rs777536750






Pathogenicity predictions:
AGVGD MAPP SIFT PPH2
C15 3e-05 0.03 1
VUS1 VUS5 VUS5 VUS5

Color code:   non disease-causing <   VUS1 <   VUS2 <   VUS3 <   VUS4 <   VUS5 <   disease-causing




No patient found in CFTR-NGS catalogue


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

TOTAL NUMBER OF PATIENTS 2
CFTR-RD2
  • CBAVD  2



Detailed genotypes:
Phenotype Patient ID Variant status Additional variants
CBAVD 523heterozygotevarying clinical consequence- Undef
CBAVD 2556heterozygoteCF-causing- Undef


Color code:   non disease-causing <   VUS1 <   VUS2 <   VUS3 <   VUS4 <   VUS5 <   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.