chr17-7675209-A-C

Position:

chr17-7675209-A-C

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PS3PM1_SupportingPP3_ModeratePP4_ModeratePM2_Supporting

This summary comes from the ClinGen Evidence Repository: The NM_000546.6: c.403T>G variant in TP53 is a missense variant predicted to cause substitution of Cysteine by Glycine at amino acid 135 (p.Cys135Gly). At least two individuals with this variant were found to have a variant allele fraction of 5-25%, which is a significant predictor of variant pathogenicity (PP4_Moderate, Internal lab contributors: SCV000664432.4). This variant is absent from gnomAD v4.1.0 (PM2_Supporting). In vitro assays performed in yeast and/or human cell lines showed non-functional transactivation and loss of growth suppression activity indicating that this variant impacts protein function (PS3; PMID:12826609, 30224644, 29979965). Computational predictor scores (BayesDel = 0.5991; Align GVGD = Class C65) are above recommended thresholds (BayesDel > 0.16 and an Align GVGD Class of 65), evidence that correlates with impact to TP53 via protein change (PP3_Moderate). This variant has 2 somatic occurrences for the same amino acid change in cancerhotspots.org (v2) sufficient to be defined as a mutational hotspot by the Clingen TP53 VCEP (2-9 somatic occurrences, PMID:30311369) (PM1_Supporting). In summary, this variant meets the criteria to be classified as pathogenic for Li Fraumeni Syndrome based on the ACMG/AMP criteria applied, as specified by the ClinGen TP53 VCEP: PP4_Moderate, PM2_Supporting, PS3, PP3_Moderate, PM1_Supporting. (Bayesian Points: 10; VCEP specifications version 2.0; 7/24/2024). LINK:https://erepo.genome.network/evrepo/ui/classification/CA16602989/MONDO:0018875/009

Frequency

Genomes: not found (cov: 33)

Consequence

TP53
NM_000546.6 missense

Scores

Clinical Significance

Likely pathogenic reviewed by expert panel P:17

Conservation

PhyloP100: 9.32

Variant links:

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 links:

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ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 10 ACMG points.

PS3

PM1

PM2

PP3

PP4

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TP53	NM_000546.6 linkuse as main transcript	c.403T>G	p.Cys135Gly	missense_variant	5/11	ENST00000269305.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TP53	ENST00000269305.9 linkuse as main transcript	c.403T>G	p.Cys135Gly	missense_variant	5/11	1	NM_000546.6	P1	P04637-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:17

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Li-Fraumeni syndrome

Pathogenic:1

Likely pathogenic, reviewed by expert panel

curation

ClinGen TP53 Variant Curation Expert Panel, ClinGen

Aug 28, 2019

This variant is absent in the gnomAD cohort (PM2_Supporting; http://gnomad.broadinstitute.org). This variant has a BayesDel score > 0.16 and Align GVGD (Zebrafish) is Class 65 (PP3_Moderate). Additionally, transactivation assays show a low functioning allele according to Kato, et al. and there is evidence of a dominant negative effect and loss of function according to Giacomelli, et al. (PS3; PMID: 12826609, 30224644). In summary, TP53 c.641A>G; p.His214Arg meets criteria to be classified as likely pathogenic for Li-Fraumeni syndrome. ACMG/AMP criteria applied, as specified by the TP53 Variant Curation Expert Panel: PM2_Supporting, PP3_Moderate, PS3. -

Adrenal cortex carcinoma

Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Prostate adenocarcinoma

Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Carcinoma of esophagus

Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Gastric adenocarcinoma

Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Squamous cell lung carcinoma

Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Breast neoplasm

Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Ovarian serous cystadenocarcinoma

Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Ovarian neoplasm

Pathogenic:1

Likely pathogenic, no assertion criteria provided

research

German Consortium for Hereditary Breast and Ovarian Cancer, University Hospital Cologne

Dec 01, 2018

- -

Li-Fraumeni syndrome 1

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Myriad Genetics, Inc.

Feb 13, 2024

This variant is considered likely pathogenic. Functional studies indicate this variant impacts protein function [PMID: 17724467, 20505364, 29979965]. -

Pancreatic adenocarcinoma

Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Lung adenocarcinoma

Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Neoplasm of brain

Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Transitional cell carcinoma of the bladder

Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Hereditary cancer-predisposing syndrome

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 12, 2021

The p.C135G pathogenic mutation (also known as c.403T>G), located in coding exon 4 of the TP53 gene, results from a T to G substitution at nucleotide position 403. The cysteine at codon 135 is replaced by glycine, an amino acid with highly dissimilar properties. This variant is in the DNA binding domain of the TP53 protein and is reported to have loss of transactivation capacity in yeast based assays (IARC TP53 database; Kato S et al. Proc Natl Acad Sci USA. 2003 Jul 8;100(14):8424-9; Kato H et al. Clin. Cancer Res., 2000 Oct;6:3937-43; Grochova D et al. Oncogene, 2008 Feb;27:1243-52). Studies conducted in human cell lines indicate this alteration is deficient at growth suppression and has a dominant negative effect (Kotler E et al. Mol.Cell. 2018 Jul;71:178-190.e8; Giacomelli AO et al. Nat. Genet. 2018 Oct;50:1381-1387). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the supporting evidence, this alteration is interpreted as a disease-causing mutation. -

Hepatocellular carcinoma

Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Neoplasm of the large intestine

Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.94

BayesDel_addAF

Pathogenic

0.58

BayesDel_noAF

Pathogenic

0.60

CADD

Pathogenic

DANN

Uncertain

0.98

DEOGEN2

Pathogenic

0.85

D;D;.;.;.;.;D;.;.;.;.;.;.;D;.;.;.;D;D;D

Eigen

Pathogenic

0.87

Eigen_PC

Pathogenic

0.82

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.94

D;D;D;D;D;.;.;.;D;D;.;D;D;D;D;D;D;D;D;D

M_CAP

Pathogenic

0.81

MetaRNN

Pathogenic

0.98

D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D

MetaSVM

Pathogenic

0.99

MutationTaster

Benign

1.0

D;D;D;D;D;D

PrimateAI

Uncertain

0.68

PROVEAN

Pathogenic

-11

D;D;.;.;.;.;D;.;.;D;D;.;.;D;.;.;D;D;D;.

REVEL

Pathogenic

0.96

Sift

Pathogenic

0.0

D;D;.;.;.;.;D;.;.;D;D;.;.;D;.;.;D;D;D;.

Sift4G

Pathogenic

0.0

D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;.;.;D

Polyphen

1.0

D;.;.;.;.;.;D;.;D;P;D;.;.;D;.;.;.;D;.;.

Vest4

0.90

MutPred

0.85

Loss of ubiquitination at K139 (P = 0.0675);Loss of ubiquitination at K139 (P = 0.0675);.;.;.;.;Loss of ubiquitination at K139 (P = 0.0675);.;Loss of ubiquitination at K139 (P = 0.0675);Loss of ubiquitination at K139 (P = 0.0675);Loss of ubiquitination at K139 (P = 0.0675);.;.;Loss of ubiquitination at K139 (P = 0.0675);.;.;.;.;Loss of ubiquitination at K139 (P = 0.0675);.;

MVP

1.0

MPC

1.8

ClinPred

1.0

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

1.0

gMVP

0.81

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over