Variant NM_000492.4:c.1477C>T


Variant details:
Name NM_000492.4:c.1477C>T
Protein name NP_000483.3:p.(Gln493*)
Genomic name (hg19) chr7:g.117199602C>T    UCSC    
#Exon/intron exon 11
Legacy Name Q493X
Class disease-causing
Subclass CF-causing
WT sequence CAGTGGAAGAATTTCATTCTGTTCT C AGTTTTCCTGGATTATGCCTGGCAC
Mutant sequence CAGTGGAAGAATTTCATTCTGTTCT T AGTTTTCCTGGATTATGCCTGGCAC

Other databases:
dbSNP
rs77101217







Pathogenicity predictors:

Not found





No patient found in CFTR-NGS catalogue


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

TOTAL NUMBER OF PATIENTS 12
CF 9
CFTR-RD3
  • Bronchiectasis  1
  • CBAVD  2




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

Detailed genotypes:
Phenotype Patient ID Variant status Additional variants
CBAVD 580heterozygoteCFTR-RD-causing- Undef
CBAVD 5290heterozygoteCFTR-RD-causing- Undef
CF 3736heterozygoteCF-causing- Undef
CF 3646heterozygoteCF-causing - Trans
CF 2986heterozygoteCF-causing - Trans
CF 2985heterozygoteCF-causing - Trans
CF 2459heterozygoteCF-causing- Undef
CF 2226heterozygoteCF-causing- Undef
CF 2017heterozygoteCF-causing- Undef
CF 586heterozygoteCF-causing- Undef
CF 4045heterozygoteCF-causing- Undef
Bronchiectasis 1756heterozygote


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



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