CFTR-France

**Updates for c.859A>T:**
2015-07-01	class changed from disease-causing to unclassified
2021-01-18	subclass updated from VUS2 to VUS3

Variant details:
Name	NM_000492.4:c.859A>T
Protein name	NP_000483.3:p.(Asn287Tyr)
Genomic name (hg19)	chr7:g.117176717A>T UCSC
Genomic name (hg38)	chr7:g.117536663A>T UCSC
#Exon/intron	exon 7
Legacy Name	N287Y
Class	VUS
Subclass	VUS
WT sequence	AGAAGCAATGGAAAAAATGATTGAA A ACTTAAGACAGTAAGTTGTTCCAAT
Mutant sequence	AGAAGCAATGGAAAAAATGATTGAA T ACTTAAGACAGTAAGTTGTTCCAAT

Other databases:
	Not found	dbSNP rs397508804


Reference	PMID	Splicing	mRNA level	Maturation	Localization	Channel fonction (Cl-)	Bicarbonate
Silvis et al, 2003	12529365			✓	✓	✓

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

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	666	heterozygote	CF-causing - Cis CF-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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