rs970212462

Positions:

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 8P and 4B. PM1PM2PP3_StrongBS2

The ENST00000269305.9(TP53):c.677G>T(p.Gly226Val) variant causes a missense change. The variant allele was found at a frequency of 0.000033 in 151,690 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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. G226A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 31)

Consequence

TP53
ENST00000269305.9 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:1

Conservation

PhyloP100: 5.04

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 Uncertain_significance. Variant got 4 ACMG points.

PM1

In a hotspot region, there are 7 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 6 benign, 15 uncertain in ENST00000269305.9

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.967

BS2

High AC in GnomAd4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TP53	NM_000546.6 linkuse as main transcript	c.677G>T	p.Gly226Val	missense_variant	7/11	ENST00000269305.9	NP_000537.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TP53	ENST00000269305.9 linkuse as main transcript	c.677G>T	p.Gly226Val	missense_variant	7/11	1	NM_000546.6	ENSP00000269305	P1	P04637-1

Frequencies

GnomAD3 genomes

AF:

0.0000330

AC:

AN:

151690

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

AF:

0.0000330

AC:

AN:

151690

Hom.:

Cov.:

AF XY:

0.0000270

AC XY:

AN XY:

74018

show subpopulations

Gnomad4 AFR

AF:

0.000121

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000340

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Hereditary cancer-predisposing syndrome

Uncertain:2Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Sep 17, 2019	This missense variant replaces glycine with valine at codon 226 of the TP53 protein. Computational prediction tools and conservation analyses are inconclusive regarding impact to protein structure and function. Splice site prediction tools suggest that this variant may not impact RNA splicing. Functional studies have shown that the variant does not affect the transactivation activity of the TP53 protein (PMID: 12826609, 15781620). To our knowledge, this variant has not been reported in individuals affected with hereditary cancer in the literature. This variant has not been identified in 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Jun 18, 2022	- -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Mar 07, 2022	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. -

Li-Fraumeni syndrome 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Jun 18, 2022

- -

Li-Fraumeni syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 12, 2022

This sequence change replaces glycine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 226 of the TP53 protein (p.Gly226Val). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with TP53-related conditions. ClinVar contains an entry for this variant (Variation ID: 458556). Advanced modeling of experimental studies (such as gene expression, population dynamics, functional pathways, and cell-cycle effects in cell culture) performed at Invitae indicates that this missense variant is not expected to disrupt TP53 protein function. Experimental studies have shown that this missense change does not substantially affect TP53 function (PMID: 12826609). 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. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jun 03, 2019

Not observed in large population cohorts (Lek et al., 2016); This variant is associated with the following publications: (PMID: 12826609, 29979965, 16173033, 26205736, 15781620, 27527004, 17557246, 16645236, 11929815, 21575214, 24204627, 14559903) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.93

BayesDel_addAF

Pathogenic

0.42

BayesDel_noAF

Pathogenic

0.37

CADD

Uncertain

DANN

Uncertain

0.98

DEOGEN2

Pathogenic

0.87

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

Eigen

Uncertain

0.30

Eigen_PC

Benign

0.15

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.99

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

M_CAP

Pathogenic

0.75

MetaRNN

Pathogenic

0.97

D;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

Pathogenic

3.3

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

MutationTaster

Benign

1.0

D;D;D;D;D;D

PrimateAI

Benign

0.42

PROVEAN

Pathogenic

-8.3

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

REVEL

Pathogenic

0.84

Sift

Pathogenic

0.0

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

Sift4G

Pathogenic

0.0010

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

Polyphen

0.99

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

Vest4

0.74

MutPred

0.83

Gain of catalytic residue at G226 (P = 0.002);Gain of catalytic residue at G226 (P = 0.002);.;.;.;.;.;.;.;Gain of catalytic residue at G226 (P = 0.002);.;Gain of catalytic residue at G226 (P = 0.002);Gain of catalytic residue at G226 (P = 0.002);Gain of catalytic residue at G226 (P = 0.002);.;.;Gain of catalytic residue at G226 (P = 0.002);.;.;.;.;

MVP

0.98

MPC

1.8

ClinPred

1.0

GERP RS

2.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.95

gMVP

0.80

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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