17-31356539-AC-ACC
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Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_001042492.3(NF1):c.7701dupC(p.Lys2568fs) variant causes a frameshift change. The variant allele was found at a frequency of 0.000000684 in 1,461,552 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: 32)
Exomes 𝑓: 6.8e-7 ( 0 hom. )
Consequence
NF1
NM_001042492.3 frameshift
NM_001042492.3 frameshift
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 7.17
Genes affected
NF1 (HGNC:7765): (neurofibromin 1) This gene product appears to function as a negative regulator of the ras signal transduction pathway. Mutations in this gene have been linked to neurofibromatosis type 1, juvenile myelomonocytic leukemia and Watson syndrome. The mRNA for this gene is subject to RNA editing (CGA>UGA->Arg1306Term) resulting in premature translation termination. Alternatively spliced transcript variants encoding different isoforms have also been described for this gene. [provided by RefSeq, Jul 2008]
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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 17-31356539-A-AC is Pathogenic according to our data. Variant chr17-31356539-A-AC is described in ClinVar as [Pathogenic]. Clinvar id is 547695.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
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32
GnomAD4 exome AF: 6.84e-7 AC: 1AN: 1461552Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1AN XY: 727082
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31
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1
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727082
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GnomAD4 genome Cov.: 32
GnomAD4 genome
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32
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:6
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Neurofibromatosis, type 1 Pathogenic:4
Pathogenic, criteria provided, single submitter | clinical testing | Center for Human Genetics, Inc, Center for Human Genetics, Inc | Nov 01, 2016 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center | Sep 02, 2024 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Genome-Nilou Lab | Mar 15, 2022 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Jun 07, 2023 | For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 547695). This variant is also known as 7633insC. This premature translational stop signal has been observed in individual(s) with neurofibromatosis type 1 (PMID: 10712197). This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Lys2547Glnfs*9) in the NF1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in NF1 are known to be pathogenic (PMID: 10712197, 23913538). - |
not provided Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | GeneDx | Oct 27, 2022 | Not observed at significant frequency in large population cohorts (gnomAD); Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; This variant is associated with the following publications: (PMID: 10712197) - |
Hereditary cancer-predisposing syndrome;CN230736:Cardiovascular phenotype Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Ambry Genetics | Nov 16, 2023 | The c.7638dupC pathogenic mutation, located in coding exon 51 of the NF1 gene, results from a duplication of C at nucleotide position 7638, causing a translational frameshift with a predicted alternate stop codon (p.K2547Qfs*9). 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. - |
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