rs79660178
Positions:
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_000492.4(CFTR):c.366T>A(p.Tyr122Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★★). Variant results in nonsense mediated mRNA decay.
Frequency
Genomes: not found (cov: 32)
Consequence
CFTR
NM_000492.4 stop_gained
NM_000492.4 stop_gained
Scores
2
3
2
Clinical Significance
Conservation
PhyloP100: 0.856
Genes affected
CFTR (HGNC:1884): (CF transmembrane conductance regulator) This gene encodes a member of the ATP-binding cassette (ABC) transporter superfamily. The encoded protein functions as a chloride channel, making it unique among members of this protein family, and controls ion and water secretion and absorption in epithelial tissues. Channel activation is mediated by cycles of regulatory domain phosphorylation, ATP-binding by the nucleotide-binding domains, and ATP hydrolysis. Mutations in this gene cause cystic fibrosis, the most common lethal genetic disorder in populations of Northern European descent. The most frequently occurring mutation in cystic fibrosis, DeltaF508, results in impaired folding and trafficking of the encoded protein. Multiple pseudogenes have been identified in the human genome. [provided by RefSeq, Aug 2017]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 18 ACMG points.
PVS1
?
Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
PM2
?
Very rare variant in population databases, with high coverage;
PP5
?
Variant 7-117530991-T-A is Pathogenic according to our data. Variant chr7-117530991-T-A is described in ClinVar as [Pathogenic]. Clinvar id is 38833.Status of the report is reviewed_by_expert_panel, 3 stars. Variant chr7-117530991-T-A is described in Lovd as [Pathogenic]. Variant chr7-117530991-T-A is described in Lovd as [Pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
CFTR | NM_000492.4 | c.366T>A | p.Tyr122Ter | stop_gained | 4/27 | ENST00000003084.11 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
CFTR | ENST00000003084.11 | c.366T>A | p.Tyr122Ter | stop_gained | 4/27 | 1 | NM_000492.4 | P2 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome Cov.: 31
GnomAD4 exome
Cov.:
31
GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:7
Revision: reviewed by expert panel
LINK: link
Submissions by phenotype
Cystic fibrosis Pathogenic:4
Pathogenic, reviewed by expert panel | research | CFTR2 | Mar 17, 2017 | - - |
Pathogenic, criteria provided, single submitter | curation | CFTR-France | Jan 29, 2018 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Ambry Genetics | Jul 18, 2022 | The p.Y122* pathogenic mutation (also known as c.366T>A and p.Y122X), located in coding exon 4 of the CFTR gene, results from a T to A substitution at nucleotide position 366. This changes the amino acid from a tyrosine to a stop codon within coding exon 4. This mutation was first reported in a 5 year old French male with classic cystic fibrosis and pancreatic insufficiency, who also carried deltaF508 (Chevalier-Porst F et al. Hum Mol Genet, 1992 Nov;1:647-8). Another paper reported this as a founder mutation on the French Reunion Island in the Indian Ocean, where 30% of the cystic fibrosis patients studied were either homozygous for this mutation or compound heterozygous with the pathogenic p.F508del mutation (deltaF508) (Duguépéroux I et al. J Cyst Fibros, 2004 Aug;3:185-8). Functional in vitro studies found that cells carrying this pathogenic mutation had elevated sweat chloride levels and decreased lung function (Sosnay PR et al. Nat Genet, 2013 Oct;45:1160-7). In addition to the clinical data presented in the literature, this alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. As such, this alteration is interpreted as a disease-causing mutation. - |
Pathogenic, criteria provided, single submitter | clinical testing | Counsyl | Feb 02, 2016 | - - |
not provided Pathogenic:2
Pathogenic, no assertion criteria provided | clinical testing | Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen | - | - - |
Pathogenic, no assertion criteria provided | clinical testing | Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+ | - | - - |
CFTR-related disorder Pathogenic:1
Pathogenic, no assertion criteria provided | clinical testing | Natera, Inc. | Mar 17, 2017 | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Pathogenic
DANN
Uncertain
Eigen
Uncertain
Eigen_PC
Benign
FATHMM_MKL
Uncertain
D
MutationTaster
Benign
A;A
Vest4
GERP RS
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at