chr9-21968235-G-C
Position:
Variant summary
Our verdict is Benign. Variant got -9 ACMG points: 2P and 11B. PM2BP4_ModerateBP6_Very_StrongBP7
The NM_000077.5(CDKN2A):āc.465C>Gā(p.Pro155=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,672 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 Likely benign (ā ā ).
Frequency
Genomes: not found (cov: 32)
Exomes š: 0.0000021 ( 0 hom. )
Consequence
CDKN2A
NM_000077.5 synonymous
NM_000077.5 synonymous
Scores
1
2
7
Clinical Significance
Conservation
PhyloP100: -0.988
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 Benign. Variant got -9 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (MetaRNN=0.10632628).
BP6
Variant 9-21968235-G-C is Benign according to our data. Variant chr9-21968235-G-C is described in ClinVar as [Likely_benign]. Clinvar id is 825077.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
BP7
Synonymous conserved (PhyloP=-0.988 with no splicing effect.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
CDKN2A | NM_000077.5 | c.465C>G | p.Pro155= | synonymous_variant | 3/3 | ENST00000304494.10 | NP_000068.1 | |
CDKN2A | NM_058195.4 | c.*109C>G | 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.465C>G | p.Pro155= | synonymous_variant | 3/3 | 1 | NM_000077.5 | ENSP00000307101 | P2 | |
CDKN2A | ENST00000579755.2 | c.*109C>G | 3_prime_UTR_variant | 3/3 | 1 | NM_058195.4 | ENSP00000462950 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
Cov.:
32
GnomAD4 exome AF: 0.00000205 AC: 3AN: 1461672Hom.: 0 Cov.: 33 AF XY: 0.00000275 AC XY: 2AN XY: 727148
GnomAD4 exome
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3
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33
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2
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727148
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GnomAD4 genome Cov.: 32
GnomAD4 genome
Cov.:
32
ClinVar
Significance: Likely benign
Submissions summary: Benign:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Hereditary cancer-predisposing syndrome Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Ambry Genetics | Feb 12, 2019 | This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. - |
Familial melanoma Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Nov 24, 2023 | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Uncertain
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
Uncertain
D
Vest4
MVP
GERP RS
Splicing
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Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at