Updates for c.1759T>A:
2024-10-14 Class updated from VUS4 to unclassified /non-CF




Variant NM_000492.4:c.1759T>A


Variant details:
Name NM_000492.4:c.1759T>A
Protein name NP_000483.3:p.(Phe587Ile)
Genomic name (hg19)     chr7:g.117230486T>A    UCSC    
Genomic name (hg38) chr7:g.117590432T>A    UCSC
#Exon/intron exon 13
Legacy Name F587I
Class VUS
Subclass non-CF
WT sequence AGATGTTTTAACAGAAAAAGAAATA T TTGAAAGGTATGTTCTTTGAATACC
Mutant sequence AGATGTTTTAACAGAAAAAGAAATA A TTGAAAGGTATGTTCTTTGAATACC

Other databases:

Not found		dbSNP
rs767349773



Pathogenicity predictors:



Response to modulators:


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

clinical and functional data presented above are provided by Vertex


No patient found in CFTR-NGS catalogue


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

TOTAL NUMBER OF PATIENTS 2
CFTR-RD1
  • CBAVD  1
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) 5219heterozygoteCF-causing - Trans
CBAVD 2681heterozygoteCF-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