rs746601313

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 3P and 8B. PM2_SupportingBS3PM1_SupportingBS2PP3

This summary comes from the ClinGen Evidence Repository: The NM_000546.6:c.760A>G variant in TP53 is a missense variant predicted to cause substitution of isoleucine by valine at amino acid 254 (p.Ile254Val). This variant has been observed in 4-7 heterozygous unrelated females from the same data source with no personal history of cancer prior to age 60 years and no personal history of sarcoma at any age (BS2_Moderate; Internal lab contributor: ClinVar SCV000545356.10). This variant has an allele frequency of 0.000006821 (11/1612700 alleles) across gnomAD v4.1.0 which is lower than the Clingen TP53 VCEP threshold (<0.00003) for PM2_Supporting, and therefore meets this criterion (PM2_Supporting). In vitro assays performed in yeast and/or human cell lines showed functional transactivation and retained growth suppression activity indicating that this variant does not impact protein function (BS3; PMIDs: 12826609, 29979965, 30224644). Computational predictor scores (BayesDel = 0.1708; Align GVGD = Class C25) are above recommended thresholds (BayesDel > 0.16 and an Align GVGD Class of > 15), evidence that correlates with impact to TP53 via protein change (PP3). 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 likely benign for Li Fraumeni syndrome based on the ACMG/AMP criteria applied, as specified by the ClinGen TP53 VCEP: BS2_Moderate, PM2_Supporting, BS3, PP3, PM1_Supporting. (Bayesian Points: -3; VCEP specifications version 2.2; 1/16/2025). LINK:https://erepo.genome.network/evrepo/ui/classification/CA001720/MONDO:0018875/009

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 30)

Exomes 𝑓: 0.0000068 ( 0 hom. )

Consequence

TP53
NM_000546.6 missense

Scores

Clinical Significance

Likely benign reviewed by expert panel U:8B:3

Conservation

PhyloP100: 8.02

Publications

41 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: Likely_benign. The variant received -5 ACMG points.

PM1

For more information check the summary or visit ClinGen Evidence Repository.

PM2

For more information check the summary or visit ClinGen Evidence Repository.

PP3

For more information check the summary or visit ClinGen Evidence Repository.

BS2

For more information check the summary or visit ClinGen Evidence Repository.

BS3

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TP53	NM_000546.6 link	c.760A>G	p.Ile254Val	missense_variant	Exon 7 of 11	ENST00000269305.9	NP_000537.3	P04637-1K7PPA8Q53GA5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TP53	ENST00000269305.9 link	c.760A>G	p.Ile254Val	missense_variant	Exon 7 of 11	1	NM_000546.6	ENSP00000269305.4		P04637-1

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151808

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000159

AC:

AN:

251476

AF XY:

0.0000221

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000352

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000685

AC:

AN:

1460892

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

726838

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33460

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86236

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000900

AC:

AN:

1111098

Other (OTH)

AF:

0.00

AC:

AN:

60364

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.495

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000659

AC:

AN:

151808

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74150

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41324

American (AMR)

AF:

0.00

AC:

AN:

15230

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5142

South Asian (SAS)

AF:

0.00

AC:

AN:

4812

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10572

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67946

Other (OTH)

AF:

0.00

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000396

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Likely benign

Submissions summary: Uncertain:8Benign:3

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Li-Fraumeni syndrome

Uncertain:2Benign:1

Sep 17, 2023

All of Us Research Program, National Institutes of Health

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This missense variant replaces isoleucine with valine at codon 254 of the TP53 protein. Computational prediction tool suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >=0.7, PMID: 27666373). Functional studies have shown that this variant does not impair TP53 protein function (PMID: 12826609, 29979965, 30224644). This variant is said to be reported in a family affected with Li-Fraumeni syndrome but detailed clinical findings were not provided for evaluation (PMID: 21348412). This variant has been reported in individuals affected with breast cancer (PMID: 33471991), non-small cell lung cancer (PMID: 27242894), and uveal melanoma (PMID: 29769598), as well as in control individuals unaffected with cancer (PMID: 28861920, 33471991). Other variants at this position have been classified as pathogenic (ClinVar Variation ID: 856299) suggesting the amino acid residue is important for function. This variant has been identified in 4/251476 individuals 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. -

Dec 19, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces isoleucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 254 of the TP53 protein (p.Ile254Val). This variant is present in population databases (rs746601313, gnomAD 0.003%). This missense change has been observed in individual(s) with TP53-related conditions (PMID: 21348412, 27242894, 28861920, 29769598, 32817165; internal data). ClinVar contains an entry for this variant (Variation ID: 406605). Invitae Evidence Modeling incorporating data from in vitro experimental studies (PMID: 12826609, 29979965, 30224644) indicates that this missense variant is not expected to disrupt TP53 function with a negative predictive value of 97.5%. Experimental studies have shown that this missense change does not substantially affect TP53 function (PMID: 12826609, 29979965, 30224644). 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. -

Jan 16, 2025

ClinGen TP53 Variant Curation Expert Panel, ClinGen

Significance:Likely benign

Review Status:reviewed by expert panel

Collection Method:curation

The NM_000546.6:c.760A>G variant in TP53 is a missense variant predicted to cause substitution of isoleucine by valine at amino acid 254 (p.Ile254Val). This variant has been observed in 4-7 heterozygous unrelated females from the same data source with no personal history of cancer prior to age 60 years and no personal history of sarcoma at any age (BS2_Moderate; Internal lab contributor: ClinVar SCV000545356.10). This variant has an allele frequency of 0.000006821 (11/1612700 alleles) across gnomAD v4.1.0 which is lower than the Clingen TP53 VCEP threshold (<0.00003) for PM2_Supporting, and therefore meets this criterion (PM2_Supporting). In vitro assays performed in yeast and/or human cell lines showed functional transactivation and retained growth suppression activity indicating that this variant does not impact protein function (BS3; PMIDs: 12826609, 29979965, 30224644). Computational predictor scores (BayesDel = 0.1708; Align GVGD = Class C25) are above recommended thresholds (BayesDel > 0.16 and an Align GVGD Class of > 15), evidence that correlates with impact to TP53 via protein change (PP3). 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 likely benign for Li Fraumeni syndrome based on the ACMG/AMP criteria applied, as specified by the ClinGen TP53 VCEP: BS2_Moderate, PM2_Supporting, BS3, PP3, PM1_Supporting. (Bayesian Points: -3; VCEP specifications version 2.2; 1/16/2025). -

Hereditary cancer-predisposing syndrome

Uncertain:2Benign:1

Jul 08, 2024

Color Diagnostics, LLC DBA Color Health

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This missense variant replaces isoleucine with valine at codon 254 of the TP53 protein. Computational prediction tool suggests that this variant may have deleterious impact on protein structure and function. Experimental studies have shown that this variant does not impair function in yeast based transcriptional transactivation studies, and human cell proliferation and growth supression assays (PMID: 12826609, 29979965, 30224644). This variant was reported in a family suspected of Li-Fraumeni syndrome (PMID: 21348412). This variant has been reported in individuals affected with breast cancer (PMID: 33471991), non-small cell lung cancer (PMID: 27242894), and uveal melanoma (PMID: 29769598), as well as in control individuals unaffected with cancer (PMID: 28861920, 33471991). Other variants at this position have been classified as pathogenic (p.Ile254Asn; ClinVar Variation ID: 856299) suggesting the amino acid residue is important for function. This variant has been identified in 4/251476 individuals 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. -

Jul 11, 2022

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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. -

Aug 20, 2020

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Uncertain:1Benign:1

Dec 12, 2022

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The frequency of this variant in the general population, 0.000035 (4/113752 chromosomes, http://gnomad.broadinstitute.org), is uninformative in assessment of its pathogenicity. In the published literature, the variant has been reported in families suspected of Li-Fraumeni Syndrome (LFS) (PMID: 21348412 (2010), 32817165 (2020)), in individuals with acute lymphocytic leukemia (ALL) (PMID: 23403321 (2013)), non-small cell lung cancer (NSCLC) (PMID: 27242894 (2016)), uveal melanoma (PMID: 29769598 (2018)), and pancreatic cancer (PMID: 35047863 (2022)). It has also been reported in a large breast cancer association study in affected and unaffected individuals (PMID: 33471991 (2021), https://databases.lovd.nl/shared/variants/TP53). Functional studies found this variant did not have an effect on TP53 protein function (PMID: 12826609 (2003), 29979965 (2018), 30224644 (2018)). Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is damaging. Based on the available information, we are unable to determine the clinical significance of this variant. -

Jun 24, 2019

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Not observed at a significant frequency in large population cohorts (Lek et al., 2016); This variant is associated with the following publications: (PMID: 21348412, 16596195, 10225439, 22634756, 25612911, 10811497, 14559903, 24663046, 23403321, 15370252, 25675526, 27242894, 25801821, 28975018, 27930734, 29979965, 28861920, 29769598, 30840781) -

not specified

Uncertain:1

Oct 24, 2018

Genetic Services Laboratory, University of Chicago

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Choroid plexus papilloma;C0235974:Carcinoma of pancreas;C0346153:Familial cancer of breast;C0585442:Bone osteosarcoma;C0699790:Carcinoma of colon;C1835398:Li-Fraumeni syndrome 1;C1859972:Adrenocortical carcinoma, hereditary;C2239176:Hepatocellular carcinoma;C2750850:Glioma susceptibility 1;C2931822:Nasopharyngeal carcinoma;C3553606:Basal cell carcinoma, susceptibility to, 7

Uncertain:1

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Malignant glioma

Uncertain:1

Laboratory of Medical Genetics Unit, Bambino Gesù Children's Hospital

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:research

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.19

BayesDel_addAF

Pathogenic

0.24

BayesDel_noAF

Pathogenic

0.17

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.40

T;T;.;.;.;.;T;T;.;D;.;.;.;.;.;.;D;.;.;.

Eigen

Uncertain

0.34

Eigen_PC

Uncertain

0.36

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.93

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

M_CAP

Pathogenic

0.60

MetaRNN

Pathogenic

0.80

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

MetaSVM

Pathogenic

1.0

MutationAssessor

Benign

1.7

.;.;.;.;.;.;.;.;.;L;.;L;L;L;.;.;L;.;.;.

PhyloP100

8.0

PrimateAI

Uncertain

0.67

PROVEAN

Benign

-0.88

N;N;.;.;.;.;.;.;.;N;.;.;N;N;.;.;N;.;.;N

REVEL

Pathogenic

0.78

Sift

Pathogenic

0.0

D;T;.;.;.;.;.;.;.;T;.;.;T;T;.;.;T;.;.;D

Sift4G

Pathogenic

0.0

D;T;T;T;T;T;T;T;T;D;T;T;T;T;T;T;D;T;D;T

Polyphen

0.97

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

Vest4

0.73

MVP

0.91

MPC

0.26

ClinPred

0.82

GERP RS

4.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.69

gMVP

0.43

Mutation Taster

=22/78

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over