9-21968216-C-T
Position:
Variant summary
Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate
The NM_000077.5(CDKN2A):c.*13G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,490 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 32)
Exomes 𝑓: 6.8e-7 ( 0 hom. )
Consequence
CDKN2A
NM_000077.5 3_prime_UTR
NM_000077.5 3_prime_UTR
Scores
1
9
Clinical Significance
Conservation
PhyloP100: -0.802
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 Uncertain_significance. Variant got 0 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (MetaRNN=0.084709615).
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
CDKN2A | NM_000077.5 | c.*13G>A | 3_prime_UTR_variant | 3/3 | ENST00000304494.10 | NP_000068.1 | ||
CDKN2A | NM_058195.4 | c.*128G>A | 3_prime_UTR_variant | 3/3 | ENST00000579755.2 | NP_478102.2 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
CDKN2A | ENST00000304494.10 | c.*13G>A | 3_prime_UTR_variant | 3/3 | 1 | NM_000077.5 | ENSP00000307101 | P2 | ||
CDKN2A | ENST00000579755.2 | c.*128G>A | 3_prime_UTR_variant | 3/3 | 1 | NM_058195.4 | ENSP00000462950 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
Cov.:
32
GnomAD4 exome AF: 6.84e-7 AC: 1AN: 1461490Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1AN XY: 727084
GnomAD4 exome
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1
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1461490
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33
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1
AN XY:
727084
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GnomAD4 genome Cov.: 32
GnomAD4 genome
Cov.:
32
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Aug 26, 2019 | This variant is located in the 3' untranslated region of the CDKN2A gene (P16-INK4A). Splice site prediction tools suggest that this variant may not impact RNA splicing. To our knowledge, functional studies have not been performed for this variant. This variant has not been reported in individuals affected with hereditary cancer in the literature. This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
DEOGEN2
Benign
T
FATHMM_MKL
Benign
N
LIST_S2
Benign
T
M_CAP
Benign
T
MetaRNN
Benign
T
MutationTaster
Benign
N;N;N;N;N;N;N;N;N
Sift4G
Pathogenic
D
Vest4
MVP
GERP RS
Splicing
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Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at