rs878853644
Positions:
Variant summary
Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PVS1_StrongPM2PP3_ModeratePP5_Moderate
The NM_000077.5(CDKN2A):c.150+1del variant causes a splice donor change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 1/1 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★).
Frequency
Genomes: not found (cov: 33)
Consequence
CDKN2A
NM_000077.5 splice_donor
NM_000077.5 splice_donor
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 3.53
Genes affected
CDKN2A (HGNC:1787): (cyclin dependent kinase inhibitor 2A) This gene generates several transcript variants which differ in their first exons. At least three alternatively spliced variants encoding distinct proteins have been reported, two of which encode structurally related isoforms known to function as inhibitors of CDK4 kinase. The remaining transcript includes an alternate first exon located 20 Kb upstream of the remainder of the gene; this transcript contains an alternate open reading frame (ARF) that specifies a protein which is structurally unrelated to the products of the other variants. This ARF product functions as a stabilizer of the tumor suppressor protein p53 as it can interact with, and sequester, the E3 ubiquitin-protein ligase MDM2, a protein responsible for the degradation of p53. In spite of the structural and functional differences, the CDK inhibitor isoforms and the ARF product encoded by this gene, through the regulatory roles of CDK4 and p53 in cell cycle G1 progression, share a common functionality in cell cycle G1 control. This gene is frequently mutated or deleted in a wide variety of tumors, and is known to be an important tumor suppressor gene. [provided by RefSeq, Sep 2012]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 10 ACMG points.
PVS1
?
Splicing variant, NOT destroyed by nmd, known LOF gene, truncates exone, which is 0.38004246 fraction of the gene.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
PP5
?
Variant 9-21974676-AC-A is Pathogenic according to our data. Variant chr9-21974676-AC-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 236980.Status of the report is criteria_provided_single_submitter, 1 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
CDKN2A | NM_000077.5 | c.150+1del | splice_donor_variant | ENST00000304494.10 | |||
CDKN2A | NM_058195.4 | c.194-3469del | intron_variant | ENST00000579755.2 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
CDKN2A | ENST00000304494.10 | c.150+1del | splice_donor_variant | 1 | NM_000077.5 | P2 | |||
CDKN2A | ENST00000579755.2 | c.194-3469del | intron_variant | 1 | NM_058195.4 |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD3 genomes
?
Cov.:
33
GnomAD4 exome Cov.: 32
GnomAD4 exome
Cov.:
32
GnomAD4 genome ? Cov.: 33
GnomAD4 genome
?
Cov.:
33
ClinVar
Significance: Likely pathogenic
Submissions summary: Pathogenic:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Familial melanoma Pathogenic:1
Likely pathogenic, criteria provided, single submitter | clinical testing | Invitae | Nov 25, 2015 | While this particular variant has not been reported in the literature, truncating variants in CDKN2A are known to be pathogenic (PMID: 15146471, 16905682). In summary, this is a novel intronic variant at splice donor site that is expected to disrupt protein function. In the absence of segregation and functional data, this variant has been classified as Likely Pathogenic. This sequence change deletes 1 nucleotide and affects a donor splice site in intron 1. It is expected to disrupt mRNA splicing and likely results in an absent or disrupted protein product. - |
Computational scores
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Calibrated prediction
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Prediction
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
DS_DL_spliceai
Position offset: 2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at