17-7673806-C-T

Variant names:

• chr17-7673806-C-T
• rs121912657
• NM_000546.6:c.814G>A

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PM6_Strong PM1 PS3 PS4_Moderate

This summary comes from the ClinGen Evidence Repository: This variant has >10 observations as a somatic hotspot variant in tumors (PM1; cancerhotspots.org v(2)). Transactivation assays show a low functioning allele according to Kato, et al. and there is evidence of a dominant negative effect and loss of function according to Giacomelli, et al. (PS3; PMID:12826609, 30224644). This variant has been reported in 4 probands meeting Chompret criteria (PS4_Moderate; PMID:25584008, 23175693, IARC, NIH). There are de novo observations in 2 probands with childhood rhabdomyosarcoma, osteosarcoma, without parental confirmation (PM6_Strong; PMID:IARC, NIH). In summary, TP53 c.814G>A (p.Val272Met) meets criteria to be classified as pathogenic for Li-Fraumeni syndrome. ACMG/AMP criteria applied, as specified by the TP53 Variant Curation Expert Panel: PM1, PS3, PS4_Moderate, PM6_Strong. LINK:https://erepo.genome.network/evrepo/ui/classification/CA000427/MONDO:0007903/009

• Frequency:
  • Genomes: 𝑓 0.0 (0 hom., cov: 31)
  • Exomes 𝑓: 0.0000014 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: TP53 NM_000546.6 missense
• Clinical Significance: Pathogenic reviewed by expert panel P:10 O:2
• Conservation: PhyloP100: 6.17
• Publications: 343 publications found

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: ClinGen, G2P, Labcorp Genetics (formerly Invitae), 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

ACMG classification

Specifications for TP53 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PS3: For more information check the summary or visit ClinGen Evidence Repository.
• PS4: For more information check the summary or visit ClinGen Evidence Repository.
• PM1: For more information check the summary or visit ClinGen Evidence Repository.
• PM6: For more information check the summary or visit ClinGen Evidence Repository.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000546.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TP53	NM_000546.6	MANE Select	c.814G>A	p.Val272Met	missense	Exon 8 of 11	NP_000537.3
	TP53	NM_001126112.3		c.814G>A	p.Val272Met	missense	Exon 8 of 11	NP_001119584.1	K7PPA8
	TP53	NM_001407262.1		c.814G>A	p.Val272Met	missense	Exon 9 of 12	NP_001394191.1	K7PPA8

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TP53	ENST00000269305.9	TSL:1 MANE Select	c.814G>A	p.Val272Met	missense	Exon 8 of 11	ENSP00000269305.4	P04637-1
	TP53	ENST00000445888.6	TSL:1	c.814G>A	p.Val272Met	missense	Exon 8 of 11	ENSP00000391478.2	P04637-1
	TP53	ENST00000610292.4	TSL:1	c.697G>A	p.Val233Met	missense	Exon 7 of 10	ENSP00000478219.1	P04637-4

Frequencies

GnomAD3 genomes AF: 0.00 AC: 0 AN: 152048 Hom.: 0 Cov.: 31

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: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00000399 AC: 1 AN: 250892 AF XY: 0.00

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: 0.00000882

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461754 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 727178

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.00 AC: 0 AN: 44692

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86242

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53412

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111942

Other (OTH) AF: 0.00 AC: 0 AN: 60390

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 152048 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 74256

African (AFR) AF: 0.00 AC: 0 AN: 41402

American (AMR) AF: 0.00 AC: 0 AN: 15250

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5166

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10610

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68008

Other (OTH) AF: 0.00 AC: 0 AN: 2088

Alfa AF: 0.00000505 Hom.: 0

ExAC AF: 0.0000330 AC: 4

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: reviewed by expert panel

Pathogenic	VUS	Benign	Condition
4	-	-	Li-Fraumeni syndrome (4)
2	-	-	Li-Fraumeni syndrome 1 (2)
1	-	-	Hereditary cancer-predisposing syndrome (1)
1	-	-	Li-Fraumeni syndrome 1;C2931038:Familial pancreatic carcinoma (1)
1	-	-	not provided (1)
1	-	-	Ovarian neoplasm (1)
-	-	-	Diffuse midline glioma, H3 K27M-mutant (1)
-	-	-	Neoplasm (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.51	D
BayesDel_noAF	Pathogenic	0.50
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.69	D
Eigen	Pathogenic	0.83
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.75	T
M_CAP	Pathogenic	0.47	D
MetaRNN	Pathogenic	0.96	D
MetaSVM	Pathogenic	0.95	D
MutationAssessor	Pathogenic	3.2	M
PhyloP100		6.2
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	-2.0	N
REVEL	Pathogenic	0.91
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.017	D
Polyphen		1.0	D
Vest4		0.62
MutPred		0.87		Loss of sheet (P = 0.1158)
MVP		0.97
MPC		0.39
ClinPred		0.94	D
GERP RS		5.1
PromoterAI		0.011	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.95
gMVP		0.77
Mutation Taster		=0/100	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs121912657; hg19: chr17-7577124; COSMIC: COSV52661812; COSMIC: COSV52661812;