17-7675199-G-C

Variant names:

• chr17-7675199-G-C
• NM_000546.6:c.413C>G

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1 PM2 PM5 PP3_Strong

The NM_000546.6(TP53):​c.413C>G​(p.Ala138Gly) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A138S) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: TP53 NM_000546.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: 5.76

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]

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PM1: In a region_of_interest Interaction with AXIN1 (size 176) in uniprot entity P53_HUMAN there are 53 pathogenic changes around while only 3 benign (95%) in NM_000546.6
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chrnull-null-null-null is described in UniProt as null.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.969

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TP53	NM_000546.6	c.413C>G	p.Ala138Gly	missense_variant	Exon 5 of 11	ENST00000269305.9	NP_000537.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TP53	ENST00000269305.9	c.413C>G	p.Ala138Gly	missense_variant	Exon 5 of 11	1	NM_000546.6	ENSP00000269305.4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

Submissions by phenotype

Li-Fraumeni syndrome Uncertain:1

Aug 17, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Experimental studies are conflicting or provide insufficient evidence to determine the effect of this variant on TP53 function (PMID: 12826609, 29979965, 30224644). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt TP53 protein function. This variant has not been reported in the literature in individuals affected with TP53-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces alanine with glycine at codon 138 of the TP53 protein (p.Ala138Gly). The alanine residue is highly conserved and there is a small physicochemical difference between alanine and glycine. -

Prostate cancer, hereditary, 1 Uncertain:1

Jan 01, 2024

Laboratory of Virology, Oncology, Biosciences and Environment, Faculty of Sciences and Techniques, Mohammedia- University Hassan II of Casablanca

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.21
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.33
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.68	D;D;.;.;.;.;D;.;.;.;.;.;.;D;.;.;.;D;D;D
Eigen	Uncertain	0.59
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.94	D;D;D;D;D;.;.;.;D;D;.;D;D;D;D;D;D;D;D;D
M_CAP	Pathogenic	0.48	D
MetaRNN	Pathogenic	0.97	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	0.96	D
MutationAssessor	Uncertain	2.5	.;.;.;.;.;.;M;.;M;M;M;.;.;M;.;.;.;.;.;.
PrimateAI	Uncertain	0.67	T
PROVEAN	Uncertain	-3.7	D;D;.;.;.;.;D;.;.;D;D;.;.;D;.;.;D;D;D;.
REVEL	Pathogenic	0.84
Sift	Uncertain	0.029	D;D;.;.;.;.;D;.;.;D;D;.;.;D;.;.;D;D;D;.
Sift4G	Uncertain	0.0040	D;T;D;D;D;T;D;T;T;T;T;T;T;D;T;D;D;.;.;D
Polyphen		1.0	D;.;.;.;.;.;D;.;D;B;D;.;.;D;.;.;.;D;.;.
Vest4		0.54
MutPred		0.89		Loss of stability (P = 0.0387);Loss of stability (P = 0.0387);.;.;.;.;Loss of stability (P = 0.0387);.;Loss of stability (P = 0.0387);Loss of stability (P = 0.0387);Loss of stability (P = 0.0387);.;.;Loss of stability (P = 0.0387);.;.;.;.;Loss of stability (P = 0.0387);.;
MVP		0.94
MPC		1.6
ClinPred		0.99	D
GERP RS		5.5
Varity_R		0.79
gMVP		0.27

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-7578517;