17-7674191-C-T

Position:

chr17-7674191-C-T

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PM1PM2PM5PP3_StrongPP5_Very_Strong

The ENST00000269305.9(TP53):c.772G>A(p.Glu258Lys) variant causes a missense change involving the alteration of a conserved nucleotide. 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 Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E258G) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 30)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

TP53
ENST00000269305.9 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:9U:1

Conservation

PhyloP100: 7.91

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:

TP53 (HGNC:):

TP53 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PM1

In a hotspot region, there are 13 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 5 benign, 17 uncertain in ENST00000269305.9

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr17-7674190-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 406590.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=2, Uncertain_significance=1}.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.991

PP5

Variant 17-7674191-C-T is Pathogenic according to our data. Variant chr17-7674191-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 12348.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr17-7674191-C-T is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TP53	NM_000546.6 linkuse as main transcript	c.772G>A	p.Glu258Lys	missense_variant	7/11	ENST00000269305.9	NP_000537.3	P04637-1K7PPA8Q53GA5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TP53	ENST00000269305.9 linkuse as main transcript	c.772G>A	p.Glu258Lys	missense_variant	7/11	1	NM_000546.6	ENSP00000269305.4		P04637-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1459798

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726348

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:9Uncertain:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary cancer-predisposing syndrome

Pathogenic:3

Likely pathogenic, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Jun 18, 2022	- -
Pathogenic, criteria provided, single submitter	clinical testing	Ambry Genetics	Apr 30, 2021	The p.E258K variant (also known as c.772G>A), located in coding exon 6 of the TP53 gene, results from a G to A substitution at nucleotide position 772. The glutamic acid at codon 258 is replaced by lysine, an amino acid with similar properties. The p.E258K variant was first reported in a patient diagnosed with breast cancer at 34 whose tumor demonstrated loss of heterozygosity (LOH), and whose family met classic LFS criteria with a history of early onset sarcomas, and brain tumors (Malkin D et al. Science. 1990 Nov;250:1233-8). This variant has also been reported in a family with a strong history of gastric cancers, and in an individual with glioblastoma multiforme (Masciari S et al. Genet. Med. 2011 Jul;13:651-7; Huang KL et al. Cell, 2018 04;173:355-370.e14). Yeast based functional studies showed this alteration to have loss of transactivation capacity, and dominant negative effect (IARC TP53 database; Kato S et al. Proc. Natl. Acad. Sci. USA. 2003 Jul;100:8424-9; Monti P et al. Mol. Cancer Res. 2011 Mar;9:271-9). Studies on this variant conducted in mammalian cells showed inability to suppress growth, and a protein binding profile indicative of a mutant protein conformation (Frebourg T et al. Proc. Natl. Acad. Sci. U.S.A., 1992 Jul;89:6413-7). Additional studies conducted in human cell lines also 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 alteration has been observed numerous times as a somatic mutation in the cancerhotspots.org database (Chang MT et al. Cancer Discov. 2018 02;8:174-183). This variant is considered to be rare based on population cohorts in the Genome Aggregation Database (gnomAD). 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. -
Pathogenic, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Jan 14, 2021	This missense variant replaces glutamic acid with lysine at codon 258 in the DNA binding domain of the TP53 protein. Computational prediction 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 the mutant protein to be non-functional and exhibit dominant negative effect in transactivation assays (PMID: 12826609, 16492679, 20128691, 21343334) and in cell growth assays (PMID: 29979965, 30224644). This variant has been reported in individuals affected with Li-Fraumeni syndrome (PMID: 9667734, 10922393, 1978757, 21552135). This variant has been identified in 1/246228 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Based on the available evidence, this variant is classified as Pathogenic. -

Li-Fraumeni syndrome 1

Pathogenic:2

Pathogenic, no assertion criteria provided	literature only	OMIM	Aug 27, 2020	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Jun 18, 2022	- -

not provided

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Oct 06, 2021	This variant has not been reported in large, multi-ethnic general populations (http://gnomad.broadinstitute.org). In the published literature, the variant has been reported in affected individuals with Li-Fraumeni Syndrome, glioblastoma, gastric, brain, and colon cancers (PMIDs: 29625052 (2018), 26425688 (2015), 21552135 (2011), 17606709 (2007), and 1978757 (1990)). Functional studies showed severe deficiencies in DNA binding and transactivation of transcriptional targets (PMIDs: 21343334 (2011) and 20128691 (2010)). Based on the available information, this variant is classified as pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Nov 30, 2021	Published functional studies demonstrate a damaging effect: non-functional transactivation, loss of growth suppression activity (Frebourg 1992, Flaman 1998, Waddell 2001, Kato 2003, Malcikova 2010, Monti 2011, Kotler 2018); Not observed at significant frequency in large population cohorts (Lek 2016); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 15722483, 11593407, 30720243, 21343334, 17606709, 9364015, 7829527, 1458490, 10719737, 21121188, 7732013, 8252037, 10753186, 11429705, 16492679, 9546439, 9635858, 1631137, 21232794, 8570655, 14559903, 12909720, 8313374, 29625052, 29979965, 21552135, 30840781, 30577483, 33309985, 15510160, 1978757, 20128691) -

Li-Fraumeni syndrome

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 13, 2023

This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 258 of the TP53 protein (p.Glu258Lys). This variant is present in population databases (rs121912652, gnomAD 0.0009%). This missense change has been observed in individuals with clinical features of Li-Fraumeni syndrome (PMID: 1978757, 9667734, 10922393, 17606709, 21552135, 29625052, 34529667; Invitae). ClinVar contains an entry for this variant (Variation ID: 12348). 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. Experimental studies have shown that this missense change affects TP53 function (PMID: 12826609, 20128691, 21343334, 29979965, 30224644). For these reasons, this variant has been classified as Pathogenic. -

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

- -

not specified

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

Mayo Clinic Laboratories, Mayo Clinic

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.58

BayesDel_noAF

Pathogenic

0.60

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.85

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

Eigen

Uncertain

0.68

Eigen_PC

Uncertain

0.54

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

0.63

MetaRNN

Pathogenic

0.99

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

MetaSVM

Pathogenic

0.94

MutationAssessor

Pathogenic

3.3

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

MutationTaster

Benign

1.0

A;A;A;A;A;A

PrimateAI

Uncertain

0.75

PROVEAN

Uncertain

-3.1

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

REVEL

Pathogenic

0.96

Sift

Uncertain

0.0010

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

Sift4G

Uncertain

0.0020

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

Polyphen

1.0

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

Vest4

0.92

MutPred

0.98

Gain of methylation at E258 (P = 0.0209);Gain of methylation at E258 (P = 0.0209);.;.;.;.;.;.;.;Gain of methylation at E258 (P = 0.0209);.;Gain of methylation at E258 (P = 0.0209);Gain of methylation at E258 (P = 0.0209);Gain of methylation at E258 (P = 0.0209);.;.;Gain of methylation at E258 (P = 0.0209);.;.;.;

MVP

0.99

MPC

0.41

ClinPred

0.99

GERP RS

3.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.99

gMVP

0.96

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

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