17-7676387-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 2P and 13B. PM1BP4_StrongBP6BS1BS2

The NM_000546.6(TP53):c.91G>A(p.Val31Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000156 in 1,613,564 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V31F) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000092 ( 1 hom., cov: 30)

Exomes 𝑓: 0.00016 ( 3 hom. )

Consequence

TP53
NM_000546.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:3B:12O:1

Conservation

PhyloP100: -0.909

Publications

95 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: Benign. The variant received -11 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 12 benign, 24 uncertain in NM_000546.6

BP4

Computational evidence support a benign effect (MetaRNN=0.00851649).

BP6

Variant 17-7676387-C-T is Benign according to our data. Variant chr17-7676387-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 127827.

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.0000922 (14/151922) while in subpopulation EAS AF = 0.00272 (14/5156). AF 95% confidence interval is 0.00164. There are 1 homozygotes in GnomAd4. There are 6 alleles in the male GnomAd4 subpopulation. Median coverage is 30. This position passed quality control check.

BS2

High AC in GnomAd4 at 14 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TP53	NM_000546.6 link	c.91G>A	p.Val31Ile	missense_variant	Exon 3 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.91G>A	p.Val31Ile	missense_variant	Exon 3 of 11	1	NM_000546.6	ENSP00000269305.4

Frequencies

GnomAD3 genomes

AF:

0.0000988

AC:

AN:

151806

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:

0.00290

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000252

AC:

AN:

249510

AF XY:

0.000229

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00339

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000888

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000163

AC:

238

AN:

1461642

Hom.:

Cov.:

AF XY:

0.000161

AC XY:

117

AN XY:

727108

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00562

AC:

223

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86252

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53260

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000630

AC:

AN:

1111934

Other (OTH)

AF:

0.000132

AC:

AN:

60390

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

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:

0.0000922

AC:

AN:

151922

Hom.:

Cov.:

AF XY:

0.0000808

AC XY:

AN XY:

74260

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41434

American (AMR)

AF:

0.00

AC:

AN:

15232

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00272

AC:

AN:

5156

South Asian (SAS)

AF:

0.00

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10536

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67960

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.513

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.000167

Hom.:

Bravo

AF:

0.0000831

ExAC

AF:

0.000255

AC:

Asia WGS

AF:

0.00115

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:3Benign:12Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Li-Fraumeni syndrome 1

Pathogenic:1Uncertain:2Benign:2

Mar 18, 2016

Soonchunhyang University Bucheon Hospital, Soonchunhyang University Medical Center

Significance:Likely pathogenic

Review Status:flagged submission

Collection Method:reference population

- -

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to determine this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Apr 11, 2023

Myriad Genetics, Inc.

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is classified as a variant of uncertain significance as there is insufficient evidence to determine its impact on protein function and/or cancer risk. -

May 15, 2020

Mendelics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Dec 10, 2015

Counsyl

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

Hereditary cancer-predisposing syndrome

Benign:4

Sep 22, 2020

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. -

May 20, 2020

Color Diagnostics, LLC DBA Color Health

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Nov 25, 2021

Sema4, Sema4

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:curation

- -

Jun 08, 2022

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:2

Sep 16, 2020

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Apr 27, 2017

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: The c.91G>A (p.Val31Ile) in TP53 gene is a missense change that involves a conserved nucleotide. The variant is located just outside of the p53 transactivation domain. Although 4/5 in silico tools predict benign outcome, in the functional studies the variant displayed moderately reduced cell proliferation suppressing activity as well as transcriptional activity on p21 (CDKN1A) and MDM2 promoters, but not on the BAX promoter compared to wt-tp53 (Yamada, 2007). In addition, it is also classified as functionally competent variant in TP53 database. The variant is present in the large control population dataset of ExAC and gnomAD at a similar frequencies of 0.00026 (31/118406 and 58/275552 chromosomes tested, respectively), predominantly in individuals of East Asian descent (0.00353; 30/ 8498 chromosomes and 58/18782 chromosomes tested) including one homozygote. These frequencies exceed the maximal expected frequency of a pathogenic allele (0.000047) in this gene. The variant has been reported in several cancer-affected individuals without evidence for causality (Toguchida, 1992; Lee, 2010; Yamada, 2007; Yamaguchi, 2016) and is generally regarded as a polymorphism. In addition, one individual dx with thyroid carcinoma tested positive for BRAF V600E, further supporting benign outcome of the variant of interest. The variant was also identified in one internal LCA specimen in co-occurrence with a known pathogenic variant in MSH6 c.4068_4071dupGATT (p.K1358fs*2). Lastly, multiple reputable databases/clinical laboratories cite the variant with classification of Likely Benign. Taking all lines of evidence into consideration, this variant has been classified as Benign. -

not specified

Benign:1Other:1

Oct 13, 2017

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Sep 19, 2013

ITMI

Significance:not provided

Review Status:no classification provided

Collection Method:reference population

- -

Hereditary breast ovarian cancer syndrome

Uncertain:1

May 01, 2019

Cancer Genomics Group, Japanese Foundation For Cancer Research

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:research

- -

Li-Fraumeni syndrome

Benign:1

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breast and/or ovarian cancer

Benign:1

Feb 23, 2023

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

TP53-related disorder

Benign:1

Dec 12, 2019

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.069

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Uncertain

-0.020

CADD

Benign

(source)

DANN

Benign

0.71

DEOGEN2

Benign

0.0043

T;T;T;.;.;.;T;.;T;T;T;.

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.5

FATHMM_MKL

Benign

0.014

LIST_S2

Benign

0.69

T;T;.;T;T;.;T;T;T;T;T;T

M_CAP

Pathogenic

0.41

MetaRNN

Benign

0.0085

T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Pathogenic

1.5

MutationAssessor

Benign

0.94

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

PhyloP100

-0.91

PROVEAN

Benign

-0.12

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

REVEL

Uncertain

0.57

Sift

Benign

0.39

T;T;T;.;T;T;T;.;T;T;.;T

Sift4G

Benign

0.41

T;T;T;T;T;T;T;T;.;.;T;.

Polyphen

0.0030

B;.;B;B;B;B;B;.;B;B;.;.

Vest4

0.092

MVP

0.96

MPC

0.52

ClinPred

0.0091

GERP RS

-4.8

PromoterAI

-0.025

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.11

gMVP

0.19

Mutation Taster

=98/2

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

Splicevardb

2.0

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