Variant NM_000492.4:c.2856G>C


Variant details:
Name NM_000492.4:c.2856G>C
Protein name NP_000483.3:p.(Met952Ile)
Genomic name (hg19) chr7:g.117243784G>C    UCSC    gnomAD
#Exon/intron exon 17
Legacy Name M952I
Class disease-causing
Subclass CFTR-RD-causing
WT sequence TGTCGAAAATTTTACACCACAAAAT G TTACATTCTGTTCTTCAAGCACCTA
Mutant sequence TGTCGAAAATTTTACACCACAAAAT C TTACATTCTGTTCTTCAAGCACCTA


External sources:

Not found		dbSNP
rs151048781




Response to modulators:


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


clinical and functional data are provided by Vertex


Pathogenicity predictions:
AGVGD MAPP SIFT PPH2
C0 0.00074 0.07 0.992
VUS1 VUS5 VUS4 VUS5

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




No patient found in CFTR-NGS catalogue


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

TOTAL NUMBER OF PATIENTS 11
CFTR-RD11
  • Bronchiectasis  1
  • CBAVD  10



Detailed genotypes:
Phenotype Patient ID Variant status Additional variants
CBAVD 436heterozygoteCF-causing- Undef
CBAVD 1488heterozygoteCF-causing- Undef
CBAVD 1393heterozygoteCFTR-RD-causing- Undef
CBAVD 967heterozygoteCF-causing - Trans
CBAVD 555heterozygoteCF-causing- Undef
CBAVD 503heterozygoteCFTR-RD-causing- Undef
CFTR-RD-causing- Undef
CFTR-RD-causing- Undef
CBAVD 484heterozygoteCF-causing- Undef
CBAVD 462heterozygoteCF-causing- Undef
CFTR-RD-causing- Undef
CBAVD 455heterozygote
CBAVD 2653heterozygoteCF-causing- Undef
Bronchiectasis 5382heterozygoteCFTR-RD-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.