17-7674250-C-G

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 20 ACMG points: 20P and 0B. PS1_ModeratePM1PM2PM5PP3_StrongPP5_Very_Strong

The NM_000546.6(TP53):c.713G>C(p.Cys238Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,694 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 13/22 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely pathogenic in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. C238G) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

TP53
NM_000546.6 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:7

Conservation

PhyloP100: 7.83

Publications

406 publications found

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 Gene-Disease associations (from GenCC):

breast cancer
Inheritance: AD Classification: DEFINITIVE Submitted by: Ambry Genetics
Li-Fraumeni syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, ClinGen, Orphanet
Li-Fraumeni syndrome 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Genomics England PanelApp
adrenocortical carcinoma, hereditary
Inheritance: AD Classification: STRONG Submitted by: Ambry Genetics
sarcoma
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
bone marrow failure syndrome 5
Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
colorectal cancer
Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
choroid plexus carcinoma
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

TP53 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 20 ACMG points.

PS1

Transcript NM_000546.6 (TP53) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar.

PM1

In a hotspot region, there are 62 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 30 uncertain 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 chr17-7674251-A-C is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 376577.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.994

PP5

Variant 17-7674250-C-G is Pathogenic according to our data. Variant chr17-7674250-C-G is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 376575.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TP53	NM_000546.6 link	c.713G>C	p.Cys238Ser	missense_variant	Exon 7 of 11	ENST00000269305.9	NP_000537.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TP53	ENST00000269305.9 link	c.713G>C	p.Cys238Ser	missense_variant	Exon 7 of 11	1	NM_000546.6	ENSP00000269305.4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461694

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727146

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33466

American (AMR)

AF:

0.00

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.00

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53408

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111872

Other (OTH)

AF:

0.00

AC:

AN:

60380

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.225

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Li-Fraumeni syndrome 1

Pathogenic:3

Feb 16, 2024

Myriad Genetics, Inc.

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely pathogenic. Functional studies indicate this variant impacts protein function [PMID: 7791795, 29979965]. This variant is expected to disrupt protein structure [Myriad internal data].

Jun 18, 2022

Genome-Nilou Lab

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Dec 15, 2020

Department of Pediatrics, Memorial Sloan Kettering Cancer Center

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:research

Hereditary cancer-predisposing syndrome

Pathogenic:2

Mar 13, 2025

Ambry Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.C238S pathogenic mutation (also known as c.713G>C), located in coding exon 6 of the TP53 gene, results from a G to C substitution at nucleotide position 713. The cysteine at codon 238 is replaced by serine, an amino acid with dissimilar properties. This variant was detected in an individual diagnosed with leiomyosarcoma, his brother had colon cancer at 28, and his two nieces had brain cancer at ages 13 and 8 (Balmaña J, Med Clin (Barc) 2002 Oct; 119(13):497-9). This variant was observed in an individual diagnosed with breast cancer (Singh J et al. Breast Cancer Res Treat, 2018 Jul;170:189-196). This variant is reported to have non-functional transactivation and a dominant negative effect in yeast based assays (Kato S et al. Proc. Natl. Acad. Sci. USA. 2003 Jul;100:8424-9; Monti P et al. Mol. Cancer Res. 2011 Mar;9(3):271-9). 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 variant is in the DNA binding domain of the TP53 protein and is one of four cysteine residues involved in binding a zinc atom necessary for the protein to adopt the correct conformation (Martin et al Hum. Mutat. 2002 Feb;19(2):149-64). Based on internal structural analysis, this variant is anticipated to result in a decrease in structural stability (Cho Y, Science 1994 Jul; 265(5170):346-55). 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.

Jun 18, 2022

Genome-Nilou Lab

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Li-Fraumeni syndrome

Pathogenic:1

Oct 29, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces cysteine, which is neutral and slightly polar, with serine, which is neutral and polar, at codon 238 of the TP53 protein (p.Cys238Ser). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with breast and/or ovarian cancer and/or clinical features of Li-Fraumeni Syndrome (PMID: 29470806, 34308366). ClinVar contains an entry for this variant (Variation ID: 376575). Advanced modeling performed at Invitae incorporating data from internal and/or published experimental studies (PMID: 12826609, 29979965, 30224644) indicates that this missense variant is expected to disrupt TP53 function. For these reasons, this variant has been classified as Pathogenic.

not provided

Pathogenic:1

Jun 07, 2019

GeneDx

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Not observed in large population cohorts (Lek et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; This variant is associated with the following publications: (PMID: 30840781, 29843463, 28160562, 29470806, 19681600, 29979965, 21343334, 20126990, 21197471, 7732013, 25294809, 25105660, 11166732, 14559903, 28303898, 29580149)

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

1.0

BayesDel_addAF

Pathogenic

0.58

BayesDel_noAF

Pathogenic

0.60

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

DEOGEN2

Pathogenic

0.88

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

Eigen

Pathogenic

0.87

Eigen_PC

Pathogenic

0.76

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.98

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

M_CAP

Pathogenic

0.82

MetaRNN

Pathogenic

0.99

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

MetaSVM

Pathogenic

0.89

MutationAssessor

Benign

0.0

.;.;.;.;.;.;.;.;.;M;.;M;M;M;.;.;M;.;.;.;.

PhyloP100

7.8

PrimateAI

Pathogenic

0.85

PROVEAN

Pathogenic

-9.5

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

REVEL

Pathogenic

0.95

Sift

Pathogenic

0.0

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;D;D;.

Vest4

0.98

ClinPred

1.0

GERP RS

4.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

1.0

gMVP

0.93

Mutation Taster

=0/100

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.11

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over