rs28934874
Variant summary
Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PM1PM2PP3_StrongPP5_Very_Strong
The NM_000546.6(TP53):c.451C>T(p.Pro151Ser) 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 Likely pathogenic (★★).
Frequency
Consequence
NM_000546.6 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 16 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes Cov.: 33
GnomAD4 exome Cov.: 35
GnomAD4 genome Cov.: 33
ClinVar
Submissions by phenotype
Li-Fraumeni syndrome Pathogenic:3
This sequence change replaces proline, which is neutral and non-polar, with serine, which is neutral and polar, at codon 151 of the TP53 protein (p.Pro151Ser). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with Li-Fraumeni syndrome (PMID: 7881428, 17606709, 20522432, 25584008). In at least one individual the variant was observed to be de novo. ClinVar contains an entry for this variant (Variation ID: 12370). Invitae Evidence Modeling incorporating data from in vitro experimental studies (PMID: 12826609, 29979965, 30224644) indicates that this missense variant is expected to disrupt TP53 function with a positive predictive value of 97.5%. Experimental studies have shown that this missense change affects TP53 function (PMID: 10713666, 12826609, 16861262, 20128691, 21343334, 23625637). For these reasons, this variant has been classified as Pathogenic. -
The following ACMG criteria was used: PM2_SUP; PS2; PS3; PP3_MOD; PM1 -
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Hereditary cancer-predisposing syndrome Pathogenic:2
The p.P151S variant (also known as c.451C>T), located in coding exon 4 of the TP53 gene, results from a C to T substitution at nucleotide position 451. The proline at codon 151 is replaced by serine, an amino acid with similar properties. This alteration has been confirmed as de novo in a proband with a personal history of adrenocortical carcinoma diagnosed at 7 months, fibrosarcoma of the scalp diagnosed at age 4, and a right sided retroperitoneal rhabdomyosarcoma diagnosed at age 5 (Gutiérrez MI et al. Hum Mol Genet, 1994 Dec;3:2247-8). This variant is in the DNA binding domain of the TP53 protein and is reported to have loss of transactivation in yeast based assays (Shi XB et al. Prostate. 2002 Apr;51(1):59-72; IARC TP53 database: Kato S et al. Proc. Natl. Acad. Sci. USA 2003 Jul;100:8424-9; Dearth LR et al. Carcinogenesis. 2007 Feb; 28(2):289-98; Monti P et al. Mol. Cancer Res. 2011 Mar; 9(3):271-9). 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). A study examining DNA binding in p53 alterations reported that p.P151S exhibited significantly decreased binding compared to wild type p53 (Malcikova J et al. Biol. Chem. 2010 391(2-3):197-205). Another study conducted in tumor cell lines indicates that this alteration may confer resistance to apoptosis. This same group performed structural analysis and concluded that this variant is likely to result in significant conformational changes that are deleterious to the function of the protein (Xie TX et al. Laryngoscope 2013 Jun;123(6):1416-23). This alteration has been observed numerous times as a somatic mutation in the cancerhotspots.org database (Chang MT et al. Cancer Discov. 2018 02;8:174-183). This variant has been detected in at least one individual at an allele fraction that is suggestive of clonal hematopoiesis, a predictor of TP53 pathogenicity (Ambry internal data; Fortuno C et al. Genet Med. 2022 03;24:673-680). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. This variant is considered to be rare based on population cohorts in the Genome Aggregation Database (gnomAD). Based on the supporting evidence, this alteration is interpreted as a disease-causing mutation. -
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Li-Fraumeni syndrome 1 Pathogenic:1
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Rhabdomyosarcoma Pathogenic:1
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Breast adenocarcinoma Pathogenic:1
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not provided Pathogenic:1
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Ovarian neoplasm Pathogenic:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at