Updates for c.1687T>A:
2018-03-09 class changed from unclassified to disease-causing




Variant NM_000492.4:c.1687T>A


Variant details:
Name NM_000492.4:c.1687T>A
Protein name NP_000483.3:p.(Tyr563Asn)
Genomic name (hg19)     chr7:g.117230414T>A    UCSC    
Genomic name (hg38) chr7:g.117590360T>A    UCSC
#Exon/intron exon 13
Legacy Name Y563N
Class disease-causing
WT sequence TTTCCATTTTCTTTTTAGAGCAGTA T ACAAAGATGCTGATTTGTATTTATT
Mutant sequence TTTCCATTTTCTTTTTAGAGCAGTA A ACAAAGATGCTGATTTGTATTTATT

Other databases:
dbSNP
rs121909006



Pathogenicity predictors:



Response to modulators:


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

clinical and functional data presented above are provided by Vertex


No patient found in CFTR-NGS catalogue


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

TOTAL NUMBER OF PATIENTS 1
CF 1




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

Detailed genotypes:
Phenotype Patient ID Variant status Additional variants
CF 3784heterozygoteCF-causing- Undef


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.



Go to CFTRare