17-7673824-C-G

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 26 ACMG points: 26P and 0B. PS1_Very_StrongPM1PM2PM5PP3_StrongPP5_Very_Strong

The NM_000546.6(TP53):c.796G>C(p.Gly266Arg) 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 Pathogenic (★★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Pathogenic in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G266V) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

TP53
NM_000546.6 missense

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: 7.91

Publications

186 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 26 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 37 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 8 benign, 34 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 chr17-7673823-C-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 233303.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.989

PP5

Variant 17-7673824-C-G is Pathogenic according to our data. Variant chr17-7673824-C-G is described in ClinVar as Pathogenic. ClinVar VariationId is 376605.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.796G>C	p.Gly266Arg	missense_variant	Exon 8 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.796G>C	p.Gly266Arg	missense_variant	Exon 8 of 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:

1460990

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726750

African (AFR)

AF:

0.00

AC:

AN:

33460

American (AMR)

AF:

0.00

AC:

AN:

44518

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26106

East Asian (EAS)

AF:

0.00

AC:

AN:

39678

South Asian (SAS)

AF:

0.00

AC:

AN:

86108

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53392

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111598

Other (OTH)

AF:

0.00

AC:

AN:

60364

GnomAD4 genome

Cov.:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary cancer-predisposing syndrome

Pathogenic:2

Jul 02, 2019

Ambry Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.G266R pathogenic mutation (also known as c.796G>C), located in coding exon 7 of the TP53 gene, results from a G to C substitution at nucleotide position 796. The glycine at codon 266 is replaced by arginine, an amino acid with dissimilar properties. This variant is in the DNA binding domain of the TP53 protein and is reported to have loss of transactivation in yeast based assays (IARC TP53 database: Kato S et al. Proc. Natl. Acad. Sci. USA 2003 Jul;100:8424-9). Studies conducted in human cell lines indicate this alteration is deficient at growth suppression (Kotler E et al. Mol. Cell 2018 Jul;71:178-190.e8; Giacomelli AO et al. Nat. Genet. 2018 Oct;50:1381-1387). Another alteration leading to the same amino acid change (c.796G>A) was reported in an individual with adrenocortical carcinoma and gliosarcoma and a family history of leiomyosarcoma, acute myeloid leukemia, breast cancer and melanoma (Guidi M et al. Future Oncol. 2017 Jan;13(1):9-12). In addition, another alteration at this amino acid position [p.G266E (c.797G>A)] was observed in an individual with medulloblastoma (Kool M et al. Cancer Cell. 2014 Mar; 25(3):393-405), and in patients meeting Chompret criteria (Ambry internal data). 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:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Li-Fraumeni syndrome 1

Pathogenic:1

Jun 18, 2022

Genome-Nilou Lab

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Li-Fraumeni syndrome

Pathogenic:1

Apr 29, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This missense change has been observed in individuals with clinical features of Li-Fraumeni syndrome (PMID: 27523101; external communication). This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 266 of the TP53 protein (p.Gly266Arg). ClinVar contains an entry for this variant (Variation ID: 376605). For these reasons, this variant has been classified as Pathogenic. Experimental studies have shown that this missense change affects TP53 function (PMID: 12826609, 16827139, 20407015, 29979965, 30224644). 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 expected to disrupt TP53 protein function. -

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

1.0

DEOGEN2

Pathogenic

0.88

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

Eigen

Pathogenic

0.87

Eigen_PC

Pathogenic

0.79

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.96

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

M_CAP

Pathogenic

0.70

MetaRNN

Pathogenic

0.99

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

MetaSVM

Pathogenic

0.91

MutationAssessor

Pathogenic

3.3

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

PhyloP100

7.9

PrimateAI

Uncertain

0.73

PROVEAN

Pathogenic

-7.3

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

REVEL

Pathogenic

0.96

Sift

Pathogenic

0.0

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

Polyphen

0.99, 1.0, 1.0

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

Vest4

0.93

MutPred

0.92

Gain of MoRF binding (P = 0.0221);.;.;.;.;.;.;.;Gain of MoRF binding (P = 0.0221);.;Gain of MoRF binding (P = 0.0221);Gain of MoRF binding (P = 0.0221);Gain of MoRF binding (P = 0.0221);.;.;Gain of MoRF binding (P = 0.0221);.;.;.;

MVP

0.99

MPC

0.42

ClinPred

1.0

GERP RS

5.1

PromoterAI

0.016

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.99

gMVP

0.92

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

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over