Variant NM_000492.4:c.1673T>C


Variant details:
Name NM_000492.4:c.1673T>C
Protein name NP_000483.3:p.(Leu558Ser)
Genomic name (hg19)     chr7:g.117227881T>C    UCSC    
Genomic name (hg38) chr7:g.117587827T>C    UCSC
#Exon/intron exon 12
Legacy Name L558S
Class disease-causing
Subclass CF-causing
WT sequence GGAGGTCAACGAGCAAGAATTTCTT T AGCAAGGTGAATAACTAATTATTGG
Mutant sequence GGAGGTCAACGAGCAAGAATTTCTT C AGCAAGGTGAATAACTAATTATTGG

Other databases:
dbSNP
rs193922504



Pathogenicity predictors:

Functional studies:


Reference PMID Splicing mRNA level Maturation Localization Channel fonction (Cl-) Bicarbonate
Sosnay et al, 2013 23974870 ✓


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



No patient found in CFTR-NGS catalogue


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

TOTAL NUMBER OF PATIENTS 7
CF 6
CFTR-RD1
  • Other  1




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

Detailed genotypes:
Phenotype Patient ID Variant status Additional variants
CF 561heterozygoteCF-causing - Trans
CF 718heterozygoteCF-causing - Trans
CF 1041heterozygoteCF-causing - Trans
CF 5448heterozygoteCF-causing- Undef
CF 2508heterozygoteCF-causing- Undef
CF 3684heterozygoteCF-causing- Undef
Other 853heterozygotevarying clinical consequence - Trans


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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