Variant NM_000492.4:c.3353C>T


Variant details:
Name NM_000492.4:c.3353C>T
Protein name NP_000483.3:p.(Ser1118Phe)
Genomic name (hg19) chr7:g.117251848C>T    UCSC    gnomAD
#Exon/intron exon 20
Legacy Name S1118F
Class disease-causing
WT sequence TTCTTCATTGCTGTTACCTTCATTT C CATTTTAACAACAGGTACTATGAAC
Mutant sequence TTCTTCATTGCTGTTACCTTCATTT T CATTTTAACAACAGGTACTATGAAC


External sources:
dbSNP
rs146521846


Functional studies:


Reference PMID Splicing mRNA level Maturation Localization Channel fonction (Cl-) Bicarbonate
Zhang et al, 2000 10866956 ✓
Penmatsa et al, 2009 19774621 ✓ ✓ ✓


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




Pathogenicity predictions:
AGVGD MAPP SIFT PPH2
C15 0.00051 0.01 0.994
VUS1 VUS5 VUS5 VUS5

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




No patient found in CFTR-NGS catalogue


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

TOTAL NUMBER OF PATIENTS 1
CFTR-RD1
  • Other  1



Detailed genotypes:
Phenotype Patient ID Variant status Additional variants
Other 3881heterozygoteCF-causing - Trans


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.