Variant NM_000492.4:c.1675G>A


Variant details:
Name NM_000492.4:c.1675G>A
Protein name NP_000483.3:p.(Ala559Thr)
Genomic name (hg19)     chr7:g.117227883G>A    UCSC    
Genomic name (hg38) chr7:g.117587829G>A    UCSC
#Exon/intron exon 12
Legacy Name A559T
Class disease-causing
Subclass CF-causing
WT sequence AGGTCAACGAGCAAGAATTTCTTTA G CAAGGTGAATAACTAATTATTGGTC
Mutant sequence AGGTCAACGAGCAAGAATTTCTTTA A CAAGGTGAATAACTAATTATTGGTC

Other databases:
dbSNP
rs75549581



Pathogenicity predictors:

Functional studies:


Reference PMID Splicing mRNA level Maturation Localization Channel fonction (Cl-) Bicarbonate
Gregory et al, 1991 1712898 ✓ ✓
Van Goor et al, 2014 23891399 ✓ ✓ ✓
Sosnay et al, 2013 23974870 ✓ ✓


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


Response to modulators:


Modulator FDA approval EMA approval in vitro / ex vivo data clinical data
VNZ-TEZ-DIVA yesnoyesno

clinical and functional data presented above are provided by Vertex


No patient found in CFTR-NGS catalogue


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

TOTAL NUMBER OF PATIENTS 5
CF 4
Pending (NBS) 1




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

Detailed genotypes:
Phenotype Patient ID Variant status Additional variants
Pending (NBS) 1064heterozygotevarying clinical consequence - Trans
CF 5881heterozygoteCF-causing - Trans
CF 3545heterozygoteCF-causing - Trans
CF 6496heterozygoteCF-causing- Undef
CF 4230heterozygoteCF-causing - Trans
VUS2 - 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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