chr17-7669676-T-C

Position:

• chr17-7669676-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_000546.6(TP53):​c.1115A>G​(p.Lys372Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TP53 NM_000546.6 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4 B:1
• Conservation: PhyloP100: 3.42

Genes affected

TP53 (HGNC:11998): (tumor protein p53) This gene encodes a tumor suppressor protein containing transcriptional activation, DNA binding, and oligomerization domains. The encoded protein responds to diverse cellular stresses to regulate expression of target genes, thereby inducing cell cycle arrest, apoptosis, senescence, DNA repair, or changes in metabolism. Mutations in this gene are associated with a variety of human cancers, including hereditary cancers such as Li-Fraumeni syndrome. Alternative splicing of this gene and the use of alternate promoters result in multiple transcript variants and isoforms. Additional isoforms have also been shown to result from the use of alternate translation initiation codons from identical transcript variants (PMIDs: 12032546, 20937277). [provided by RefSeq, Dec 2016]

TP53 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM1: In a mutagenesis_site Induces a decrease in protein stabilization. (size 0) in uniprot entity P53_HUMAN
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.29893973).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TP53	NM_000546.6	c.1115A>G	p.Lys372Arg	missense_variant	11/11	ENST00000269305.9	NP_000537.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TP53	ENST00000269305.9	c.1115A>G	p.Lys372Arg	missense_variant	11/11	1	NM_000546.6	ENSP00000269305.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:2 Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Dec 09, 2019	This missense variant replaces lysine with arginine at codon 372 of the TP53 protein. Computational prediction is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). Splice site prediction tools suggest that this variant may not impact RNA splicing. Experimental functional studies have demonstrated that methylation of Lys372 regulates protein stability and that this variant (p.Lys372Arg) abolishes this effect (PMID 15525938, 17108971), however other studies have shown this variant to be functional in transactivation studies (PMID 12826609, 30224644). To our knowledge, 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. -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Jan 07, 2021	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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Jun 18, 2022	- -

Li-Fraumeni syndrome 1 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Jun 18, 2022

- -

TP53-related disorder Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Aug 14, 2023

The TP53 c.1115A>G variant is predicted to result in the amino acid substitution p.Lys372Arg. Methylation studies suggest this variant impacts protein stability (Figures 1E and 4E, Chuikov et al. 2004. PubMed ID: 15525938; Figure 1, Huang et al. 2006. PubMed ID: 17108971). It has also been reported in a mutagenesis study (Table S2 and S3, Giacomelli et al. 2018. PubMed ID: 30224644). This variant has not been reported in a large population database (http://gnomad.broadinstitute.org), indicating this variant is rare. It has conflicting interpretations of likely benign and uncertain significance in ClinVar (https://preview.ncbi.nlm.nih.gov/clinvar/variation/230970/). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.068
BayesDel_addAF	Uncertain	0.13	D
BayesDel_noAF	Uncertain	-0.050
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.55	.;.;.;D;.;D;.;.
Eigen	Benign	0.12
Eigen_PC	Benign	0.22
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.79	T;T;.;.;.;T;T;T
M_CAP	Pathogenic	0.48	D
MetaRNN	Benign	0.30	T;T;T;T;T;T;T;T
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Benign	1.9	.;.;.;L;.;L;.;.
PrimateAI	Benign	0.47	T
PROVEAN	Benign	-0.19	.;.;.;N;.;N;.;.
REVEL	Uncertain	0.52
Sift	Benign	0.066	.;.;.;T;.;T;.;.
Sift4G	Benign	0.35	T;T;T;T;T;T;T;T
Polyphen		0.19	.;.;.;B;.;B;.;.
Vest4		0.20
MutPred		0.16		.;.;.;Loss of methylation at K372 (P = 0.0217);.;Loss of methylation at K372 (P = 0.0217);.;.;
MVP		0.88
MPC		2.6
ClinPred		0.74	D
GERP RS		5.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.9
Varity_R		0.54
gMVP		0.21

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs876658876; hg19: chr17-7572994;