rs762844777
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_000492.4(CFTR):c.2822del(p.Leu941GlnfsTer27) variant causes a frameshift change. The variant allele was found at a frequency of 0.000000684 in 1,461,756 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★★). Variant results in nonsense mediated mRNA decay.
Frequency
Genomes: not found (cov: 33)
Exomes 𝑓: 6.8e-7 ( 0 hom. )
Consequence
CFTR
NM_000492.4 frameshift
NM_000492.4 frameshift
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 4.94
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 7-117603695-CT-C is Pathogenic according to our data. Variant chr7-117603695-CT-C is described in ClinVar as [Pathogenic]. Clinvar id is 555883.Status of the report is reviewed_by_expert_panel, 3 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
CFTR | NM_000492.4 | c.2822del | p.Leu941GlnfsTer27 | frameshift_variant | 17/27 | ENST00000003084.11 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
CFTR | ENST00000003084.11 | c.2822del | p.Leu941GlnfsTer27 | frameshift_variant | 17/27 | 1 | NM_000492.4 | P2 |
Frequencies
GnomAD3 genomes ? Cov.: 33
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GnomAD3 exomes AF: 0.00000398 AC: 1AN: 251410Hom.: 0 AF XY: 0.00 AC XY: 0AN XY: 135870
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GnomAD4 exome AF: 6.84e-7 AC: 1AN: 1461756Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0AN XY: 727180
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GnomAD4 genome ? Cov.: 33
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ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:5
Revision: reviewed by expert panel
LINK: link
Submissions by phenotype
Cystic fibrosis Pathogenic:3
Pathogenic, reviewed by expert panel | research | CFTR2 | Sep 24, 2021 | - - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Counsyl | Jan 02, 2018 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Jun 27, 2023 | For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 555883). This premature translational stop signal has been observed in individual(s) with cystic fibrosis (PMID: 23810505). This variant is present in population databases (rs762844777, gnomAD 0.003%). This sequence change creates a premature translational stop signal (p.Leu941Glnfs*27) in the CFTR gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in CFTR are known to be pathogenic (PMID: 1695717, 7691345, 9725922). - |
CFTR-related disorders Pathogenic:1
Pathogenic, no assertion criteria provided | clinical testing | Natera, Inc. | Jun 15, 2018 | - - |
Cystic fibrosis;C0238339:Hereditary pancreatitis;C0403814:Congenital bilateral aplasia of vas deferens from CFTR mutation;C2749757:Bronchiectasis with or without elevated sweat chloride 1 Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Fulgent Genetics, Fulgent Genetics | Apr 05, 2022 | - - |
Computational scores
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at