17-7676131-G-A

Position:

• chr17-7676131-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000546.6(TP53):​c.238C>T​(p.Pro80Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TP53 NM_000546.6 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:4
• Conservation: PhyloP100: 1.60

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 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1766985).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TP53	NM_000546.6	c.238C>T	p.Pro80Ser	missense_variant	4/11	ENST00000269305.9	NP_000537.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TP53	ENST00000269305.9	c.238C>T	p.Pro80Ser	missense_variant	4/11	1	NM_000546.6	ENSP00000269305.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Feb 14, 2017	The p.P80S variant (also known as c.238C>T), located in coding exon 3 of the TP53 gene, results from a C to T substitution at nucleotide position 238. The proline at codon 80 is replaced by serine, an amino acid with similar properties. This alteration has been reported as a somatic mutation once but not as a germline mutation by the IARC TP53 database (Petitjean A et al. IARC TP53 database [version R17, November 2013]. Hum. Mutat. 2007 Jun;28:622-9). This variant is in the proline-rich domain of the TP53 protein and was not found to have an effect on transactivation capacity in yeast-based assays (IARC TP53 database; Kato S et al. Proc. Natl. Acad. Sci. USA. 2003 Jul;100:8424-9). This amino acid position is highly conserved through mammals but not in all available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
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

Jun 28, 2022

This sequence change replaces proline, which is neutral and non-polar, with serine, which is neutral and polar, at codon 80 of the TP53 protein (p.Pro80Ser). 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: 406593). 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. -

Li-Fraumeni syndrome 1 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Jun 18, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.075
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.010
CADD	Benign	9.4
DANN	Benign	0.77
DEOGEN2	Benign	0.0074	T;T;.;T;.;.;.;.;.;.;T;.;.;T;T;.
Eigen	Benign	-0.70
Eigen_PC	Benign	-0.68
FATHMM_MKL	Benign	0.35	N
LIST_S2	Benign	0.70	T;T;.;.;.;T;T;.;T;T;T;T;T;T;T;T
M_CAP	Uncertain	0.12	D
MetaRNN	Benign	0.18	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Uncertain	0.65	D
MutationAssessor	Benign	1.2	.;.;.;L;.;L;L;L;.;.;L;.;.;.;.;.
PrimateAI	Uncertain	0.49	T
PROVEAN	Benign	0.11	N;N;.;N;.;.;N;N;.;.;N;.;.;N;.;N
REVEL	Uncertain	0.49
Sift	Benign	0.13	T;T;.;T;.;.;T;T;.;.;T;.;.;T;.;T
Sift4G	Benign	0.36	T;T;T;T;T;T;T;T;T;T;T;T;T;.;T;.
Polyphen		0.051	B;.;.;B;.;B;B;B;.;.;B;.;.;B;.;.
Vest4		0.20
MutPred		0.25		Gain of phosphorylation at P80 (P = 0.0059);Gain of phosphorylation at P80 (P = 0.0059);.;Gain of phosphorylation at P80 (P = 0.0059);.;Gain of phosphorylation at P80 (P = 0.0059);Gain of phosphorylation at P80 (P = 0.0059);Gain of phosphorylation at P80 (P = 0.0059);.;.;Gain of phosphorylation at P80 (P = 0.0059);.;Gain of phosphorylation at P80 (P = 0.0059);Gain of phosphorylation at P80 (P = 0.0059);Gain of phosphorylation at P80 (P = 0.0059);Gain of phosphorylation at P80 (P = 0.0059);
MVP		0.92
MPC		0.72
ClinPred		0.074	T
GERP RS		3.8
Varity_R		0.099
gMVP		0.45

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

Other links and lift over

dbSNP: rs1060501204; hg19: chr17-7579449; COSMIC: COSV53041453; COSMIC: COSV53041453;