chr7-117530950-TAT-G
Variant summary
Our verdict is Pathogenic. Variant got 22 ACMG points: 22P and 0B. PVS1PS1PM2PP5_Very_Strong
The NM_000492.4(CFTR):c.325_327delTATinsG(p.Tyr109GlyfsTer4) variant causes a frameshift, missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★★★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Pathogenic in Lovd. Variant results in nonsense mediated mRNA decay.
Frequency
Consequence
NM_000492.4 frameshift, missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 22 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
CFTR | NM_000492.4 | c.325_327delTATinsG | p.Tyr109GlyfsTer4 | frameshift_variant, missense_variant | Exon 4 of 27 | ENST00000003084.11 | NP_000483.3 |
Ensembl
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD4 genome Cov.: 32
ClinVar
Submissions by phenotype
Cystic fibrosis Pathogenic:3
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Variant summary: CFTR c.325_327delinsG (p.Tyr109GlyfsX4) results in a premature termination codon, predicted to cause a truncation of the encoded protein or absence of the protein due to nonsense mediated decay, which are commonly known mechanisms for disease. The variant was absent in 251124 control chromosomes. c.325_327delinsG has been reported in the literature in multiple individuals affected with Cystic Fibrosis, including as a compound heterozygous genotype (e.g. Terzic_2019). These data indicate that the variant may be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication has been ascertained in the context of this evaluation (PMID: 31523618). ClinVar contains an entry for this variant (Variation ID: 53696). Based on the evidence outlined above, the variant was classified as pathogenic. -
Bronchiectasis with or without elevated sweat chloride 1 Pathogenic:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at