Updates for c.1745C>T:
2015-07-01 class changed from disease-causing to unclassified
2022-10-24 Classe updated from VUS to disease-causing, subclass undefined




Variant NM_000492.4:c.1745C>T


Variant details:
Name NM_000492.4:c.1745C>T
Protein name NP_000483.3:p.(Thr582Ile)
Genomic name (hg19)     chr7:g.117230472C>T    UCSC    
Genomic name (hg38) chr7:g.117590418C>T    UCSC
#Exon/intron exon 13
Legacy Name T582I
Class disease-causing
WT sequence CCTTTTGGATACCTAGATGTTTTAA C AGAAAAAGAAATATTTGAAAGGTAT
Mutant sequence CCTTTTGGATACCTAGATGTTTTAA T AGAAAAAGAAATATTTGAAAGGTAT

Other databases:

Not found		dbSNP
rs397508293



Pathogenicity predictors:

Functional studies:


Reference PMID Splicing mRNA level Maturation Localization Channel fonction (Cl-) Bicarbonate
Hatton et al., 2022 34949556 ✓ ✓


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



1 individuals carrying this variant are reported in CFTR-NGS catalogue


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

TOTAL NUMBER OF PATIENTS 5
CF 1
CFTR-RD3
  • CBAVD  2
  • Other  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
CF 114heterozygotevarying clinical consequence - Trans
CBAVD 5387heterozygoteCF-causing- Undef
CBAVD 6476heterozygotevarying clinical consequence- Undef
Other 5666heterozygoteCFTR-RD-causing- Undef
Pending (NBS) 5020heterozygoteCF-causing - 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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