17-7675176-A-C

Variant names:

• chr17-7675176-A-C
• rs786203064
• NM_000546.6:c.436T>G

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 6P and 1B. BP4 PM2_Supporting PS4_Supporting PS3

This summary comes from the ClinGen Evidence Repository: The NM_000546.6: c.436T>G variant in TP53 is a missense variant predicted to cause substitution of tryptophan by glycine at amino acid 146 (p.Trp146Gly). This variant has been reported in 2 families, one meeting Classic and one Revised Chompret criteria. Based on this evidence, this variant scores 1.5 total points meeting the TP53 VCEP phenotype scoring criteria of 1-1.5 points. (PS4_Supporting; Internal lab contributors). This variant is absent from gnomAD v4.1.0 (PM2_Supporting). In vitro assays performed in yeast and/or human cell lines showed non-functional transactivation and loss of growth suppression activity indicating that this variant impacts protein function (PS3; PMIDs: 12826609, 30224644). Computational predictor scores (BayesDel = 0.0351; Align GVGD Class 0) are below the recommended thresholds (BayesDel < 0.16 and > -0.008 and an Align GVGD Class ≤ 55), evidence that does not predict a damaging effect on TP53 via protein change. SpliceAI predicts that the variant has no impact on splicing (BP4). In summary, this variant meets the criteria to be classified as Uncertain Significance for Li Fraumeni syndrome based on the ACMG/AMP criteria applied, as specified by the ClinGen TP53 VCEP: PS4_Supporting, PM2_Supporting, PS3, BP4. (Bayesian Points: 5; VCEP specifications version 2.3) LINK:https://erepo.genome.network/evrepo/ui/classification/CA000190/MONDO:0018875/009

• Frequency: Genomes: not found (cov: 33)
• Consequence: TP53 NM_000546.6 missense
• Clinical Significance: Uncertain significance reviewed by expert panel U:2
• Conservation: PhyloP100: 1.07
• Publications: 24 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

Our verdict: Uncertain_significance. The variant received 5 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.
• PM2: For more information check the summary or visit ClinGen Evidence Repository.
• BP4: 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.436T>G	p.Trp146Gly	missense	Exon 5 of 11	NP_000537.3
	TP53	NM_001126112.3		c.436T>G	p.Trp146Gly	missense	Exon 5 of 11	NP_001119584.1	K7PPA8
	TP53	NM_001407262.1		c.436T>G	p.Trp146Gly	missense	Exon 6 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.436T>G	p.Trp146Gly	missense	Exon 5 of 11	ENSP00000269305.4	P04637-1
	TP53	ENST00000445888.6	TSL:1	c.436T>G	p.Trp146Gly	missense	Exon 5 of 11	ENSP00000391478.2	P04637-1
	TP53	ENST00000610292.4	TSL:1	c.319T>G	p.Trp107Gly	missense	Exon 4 of 10	ENSP00000478219.1	P04637-4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: reviewed by expert panel

Pathogenic	VUS	Benign	Condition
-	1	-	Hereditary cancer-predisposing syndrome (1)
-	1	-	Li-Fraumeni syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.55
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Uncertain	0.040
CADD	Benign	20
DANN	Benign	0.87
DEOGEN2	Uncertain	0.77	D
Eigen	Benign	-0.44
Eigen_PC	Benign	-0.60
FATHMM_MKL	Benign	0.27	N
LIST_S2	Benign	0.82	T
M_CAP	Pathogenic	0.54	D
MetaRNN	Uncertain	0.50	D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Uncertain	2.5	M
PhyloP100		1.1
PrimateAI	Benign	0.45	T
PROVEAN	Benign	-2.1	N
REVEL	Uncertain	0.54
Sift	Benign	0.10	T
Sift4G	Benign	0.12	T
Polyphen		0.93	P
Vest4		0.47
MutPred		0.61		Gain of disorder (P = 0.0062)
MVP		0.97
MPC		2.1
ClinPred		0.59	D
GERP RS		0.44
PromoterAI		0.0065	Neutral
Varity_R		0.74
gMVP		0.53

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

Other links and lift over

dbSNP: rs786203064; hg19: chr17-7578494; COSMIC: COSV52726362;