Variant NM_000492.4:c.137C>A


Variant details:
Name NM_000492.4:c.137C>A
Protein name NP_000483.3:p.(Ala46Asp)
Genomic name (hg19) chr7:g.117144390C>A    UCSC    
#Exon/intron exon 2
Legacy Name A46D
Class disease-causing
Subclass CF-causing
WT sequence TACCAAATCCCTTCTGTTGATTCTG C TGACAATCTATCTGAAAAATTGGAA
Mutant sequence TACCAAATCCCTTCTGTTGATTCTG A TGACAATCTATCTGAAAAATTGGAA

Other databases:
dbSNP
rs151020603



Pathogenicity predictors:

Functional studies:


Reference PMID Splicing mRNA level Maturation Localization Channel fonction (Cl-) Bicarbonate
Van Goor et al, 2014 23891399 ✓ ✓ ✓
Bergougnoux et al, 2015 25797027 ✓ ✓ ✓


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




No patient found in CFTR-NGS catalogue


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

TOTAL NUMBER OF PATIENTS 5
CF 3
CFTR-RD2
  • Bronchiectasis  2




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

Detailed genotypes:
Phenotype Patient ID Variant status Additional variants
Bronchiectasis 693heterozygoteCFTR-RD-causing - Trans
VUS1- Undef
Bronchiectasis 5466heterozygotenon-CF- Undef
CF 3037heterozygoteCF-causing - Trans
CF 3193heterozygoteCF-causing - Trans
CF 4629heterozygoteCF-causing - Trans
VUS1- Undef


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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