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rs28934578

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PM1PM2PM5PP3_StrongPP5_Very_Strong

The NM_000546.6(TP53):c.524G>T(p.Arg175Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD Genomes project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R175C) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Consequence

TP53
NM_000546.6 missense

Scores

15
2
1

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: 6.16
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]

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ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PM1
In a hotspot region, there are 10 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 2 benign, 16 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 chr17-7675089-G-C is described in ClinVar as [Pathogenic]. Clinvar id is 376649.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
PP3
MetaRNN computational evidence supports a deleterious effect, 0.994
PP5
Variant 17-7675088-C-A is Pathogenic according to our data. Variant chr17-7675088-C-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 182963.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr17-7675088-C-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE UniProt
TP53NM_000546.6 linkuse as main transcriptc.524G>T p.Arg175Leu missense_variant 5/11 ENST00000269305.9

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Appris UniProt
TP53ENST00000269305.9 linkuse as main transcriptc.524G>T p.Arg175Leu missense_variant 5/111 NM_000546.6 P1P04637-1

Frequencies

GnomAD3 genomes
Cov.:
33
GnomAD4 exome
Cov.:
35
GnomAD4 genome
Cov.:
33

ClinVar

Significance: Pathogenic/Likely pathogenic
Submissions summary: Pathogenic:4
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

Hereditary cancer-predisposing syndrome Pathogenic:2
Likely pathogenic, criteria provided, single submitterclinical testingGenome-Nilou LabJun 18, 2022- -
Pathogenic, criteria provided, single submitterclinical testingAmbry GeneticsSep 17, 2020The p.R175L pathogenic mutation (also known as c.524G>T), located in coding exon 4 of the TP53 gene, results from a G to T substitution at nucleotide position 524. The arginine at codon 175 is replaced by leucine, an amino acid with dissimilar properties. This alteration has been identified in pediatric patients with adrenal cortical carcinoma and in families meeting Chompret criteria for Li-Fraumeni syndrome (West AN et al. Cancer Res. 2006 May; 66(10):5056-62; Ambry internal data). This alteration is located in the DNA binding domain and has shown a partial loss of transactivation activity, and temperature sensitivity in yeast and mammalian cell in vitro assays (Kato S et al. Proc Natl Acad Sci USA. 2003 Jul 8;100(14):8424-9; Shiraishi K et al. J. Biol. Chem. 2004 Jan; 279(1):348-55; Dearth LR et al. Carcinogenesis 2007 Feb; 28(2):289-98). More extensive evaluation of this variant showed that it was able to suppress cell growth similar to wild type p53, yet was deficient in apoptotic activity (West AN et al. Cancer Res. 2006 May; 66(10):5056-62). Structural modeling by this same group determined that the leucine substitution may destabilize the native structure, yet not necessarily disrupt the overall conformation of the DNA binding domain. Studies conducted in human cell lines are equivocal about this variant's ability to suppress cell growth (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 at this same position, p.R175H, is a well-characterized mutation hotspot known to be associated with classic Li-Fraumeni syndrome (McIntyre et al. J Clin Oncol. 1994. 12(5):925-930; Melhem-Bertrandt et al. Cancer. 2012. 118(4):908-13; Choong et al. Clin Genet. 2012. 82(6):564-8; Varley et al. J Med Genet. 1995. 32:942-945). This variant was not reported in population-based cohorts in the Genome Aggregation Database (gnomAD). 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. -
Li-Fraumeni syndrome Pathogenic:1
Pathogenic, criteria provided, single submitterclinical testingInvitaeAug 16, 2022For these reasons, this variant has been classified as Pathogenic. This variant disrupts the p.Arg175 amino acid residue in TP53. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 8164043, 8825920, 11370630, 21761402, 22006311, 25927356). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. Experimental studies are conflicting or provide insufficient evidence to determine the effect of this variant on TP53 function (PMID: 12826609, 16707427, 16861262). 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. ClinVar contains an entry for this variant (Variation ID: 182963). This missense change has been observed in individuals with Li-Fraumeni syndrome (PMID: 16707427; Invitae). This variant is not present in population databases (gnomAD no frequency). This sequence change replaces arginine, which is basic and polar, with leucine, which is neutral and non-polar, at codon 175 of the TP53 protein (p.Arg175Leu). -
Li-Fraumeni syndrome 1 Pathogenic:1
Likely pathogenic, criteria provided, single submitterclinical testingGenome-Nilou LabJun 18, 2022- -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
0.99
BayesDel_addAF
Pathogenic
0.56
D
BayesDel_noAF
Pathogenic
0.57
Cadd
Pathogenic
28
Dann
Uncertain
1.0
DEOGEN2
Pathogenic
0.88
D;D;.;.;.;.;T;T;.;D;.;.;.;.;.;.;D;.;.;.;D
Eigen
Pathogenic
0.89
Eigen_PC
Pathogenic
0.81
FATHMM_MKL
Pathogenic
0.99
D
LIST_S2
Pathogenic
0.98
D;D;D;D;D;D;D;D;.;.;.;D;D;.;D;D;D;D;D;D;D
M_CAP
Pathogenic
0.70
D
MetaRNN
Pathogenic
0.99
D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM
Pathogenic
0.92
D
MutationTaster
Benign
1.0
D;D;D;D;D;D
PrimateAI
Uncertain
0.66
T
PROVEAN
Pathogenic
-6.8
D;D;.;.;.;.;.;.;.;D;.;.;D;D;.;.;D;.;.;D;D
REVEL
Pathogenic
0.96
Sift
Pathogenic
0.0
D;D;.;.;.;.;.;.;.;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;D;.
Polyphen
1.0
D;.;.;.;.;.;.;.;.;D;.;D;D;D;.;.;D;.;.;.;D
Vest4
0.97
MutPred
0.99
Loss of disorder (P = 0.0191);Loss of disorder (P = 0.0191);.;.;.;.;.;.;.;Loss of disorder (P = 0.0191);.;Loss of disorder (P = 0.0191);Loss of disorder (P = 0.0191);Loss of disorder (P = 0.0191);.;.;Loss of disorder (P = 0.0191);.;.;.;.;
MVP
1.0
MPC
1.8
ClinPred
1.0
D
GERP RS
5.4
RBP_binding_hub_radar
0.0
RBP_regulation_power_radar
1.7
Varity_R
0.99
gMVP
0.85

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs28934578; hg19: chr17-7578406; COSMIC: COSV52731306; COSMIC: COSV52731306; API