rs967461896

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PM1PM2PM5PP3_StrongPP5

The NM_000546.6(TP53):​c.526T>G​(p.Cys176Gly) 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 Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. C176R) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 33)

Consequence

TP53
NM_000546.6 missense

Scores

14
4
1

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:3U:1

Conservation

PhyloP100: 9.32
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 11 ACMG points.

PM1
In a region_of_interest Interaction with AXIN1 (size 176) in uniprot entity P53_HUMAN there are 53 pathogenic changes around while only 3 benign (95%) 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 chr17-7675086-A-G is described in Lovd as [Pathogenic].
PP3
MetaRNN computational evidence supports a deleterious effect, 0.994
PP5
Variant 17-7675086-A-C is Pathogenic according to our data. Variant chr17-7675086-A-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 376571.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=2, Likely_pathogenic=1}.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
TP53NM_000546.6 linkuse as main transcriptc.526T>G p.Cys176Gly missense_variant 5/11 ENST00000269305.9 NP_000537.3 P04637-1K7PPA8Q53GA5

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
TP53ENST00000269305.9 linkuse as main transcriptc.526T>G p.Cys176Gly missense_variant 5/111 NM_000546.6 ENSP00000269305.4 P04637-1

Frequencies

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

ClinVar

Significance: Conflicting classifications of pathogenicity
Submissions summary: Pathogenic:3Uncertain:1
Revision: criteria provided, conflicting classifications
LINK: link

Submissions by phenotype

Li-Fraumeni syndrome 1 Pathogenic:1
Likely pathogenic, criteria provided, single submitterclinical testingMyriad Genetics, Inc.Feb 14, 2024This variant is considered likely pathogenic. Functional studies indicate this variant impacts protein function [PMID:29979965]. This variant is expected to disrupt protein structure [Myriad internal data]. -
Hereditary cancer-predisposing syndrome Pathogenic:1
Pathogenic, criteria provided, single submitterclinical testingAmbry GeneticsAug 22, 2024The p.C176G pathogenic mutation (also known as c.526T>G), located in coding exon 4 of the TP53 gene, results from a T to G substitution at nucleotide position 526. The cysteine at codon 176 is replaced by glycine, an amino acid with highly dissimilar properties. Studies conducted in human cell lines indicate this alteration is deficient at growth suppression and has a dominant negative effect (Kotler E et al. Mol.Cell. 2018 Jul;71:178-190.e8; Giacomelli AO et al. Nat. Genet. 2018 Oct;50:1381-1387). This variant is in the DNA binding domain of the TP53 protein and is reported to have non-functional transactivation in yeast based assays (Kato S et al. Proc Natl Acad Sci U S A, 2003 Jul;100:8424-9). This variant has been detected in at least two individuals 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 variant is considered to be rare based on population 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 variant is interpreted as a disease-causing mutation. -
Ovarian neoplasm Pathogenic:1
Likely pathogenic, no assertion criteria providedresearchGerman Consortium for Hereditary Breast and Ovarian Cancer, University Hospital CologneDec 01, 2018- -
Li-Fraumeni syndrome Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpSep 01, 2023This sequence change replaces cysteine, which is neutral and slightly polar, with glycine, which is neutral and non-polar, at codon 176 of the TP53 protein (p.Cys176Gly). 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: 376571). Advanced modeling performed at Invitae incorporating data from internal and/or published experimental studies (PMID: 12826609, 29979965, 30224644) indicates that this missense variant is expected to disrupt TP53 function. 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. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
1.0
BayesDel_addAF
Pathogenic
0.58
D
BayesDel_noAF
Pathogenic
0.60
CADD
Pathogenic
27
DANN
Uncertain
0.98
DEOGEN2
Pathogenic
0.88
D;D;.;.;.;.;D;D;.;D;.;.;.;.;.;.;D;.;.;.;D
Eigen
Pathogenic
0.95
Eigen_PC
Pathogenic
0.89
FATHMM_MKL
Pathogenic
1.0
D
LIST_S2
Uncertain
0.97
D;D;D;D;D;D;D;D;.;.;.;D;D;.;D;D;D;D;D;D;D
M_CAP
Pathogenic
0.84
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
0.93
D
MutationAssessor
Pathogenic
3.3
.;.;.;.;.;.;.;.;.;M;.;M;M;M;.;.;M;.;.;.;.
PrimateAI
Uncertain
0.72
T
PROVEAN
Pathogenic
-12
D;D;.;.;.;.;.;.;.;D;.;.;D;D;.;.;D;.;.;D;D
REVEL
Pathogenic
0.95
Sift
Uncertain
0.0010
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
0.99
D;.;.;.;.;.;.;.;.;D;.;D;D;D;.;.;D;.;.;.;D
Vest4
0.98
MutPred
0.94
Loss of stability (P = 0.0047);Loss of stability (P = 0.0047);.;.;.;.;.;.;.;Loss of stability (P = 0.0047);.;Loss of stability (P = 0.0047);Loss of stability (P = 0.0047);Loss of stability (P = 0.0047);.;.;Loss of stability (P = 0.0047);.;.;.;.;
MVP
0.99
MPC
1.8
ClinPred
1.0
D
GERP RS
5.6
RBP_binding_hub_radar
0.0
RBP_regulation_power_radar
1.1
Varity_R
1.0
gMVP
0.90

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

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

Other links and lift over

dbSNP: rs967461896; hg19: chr17-7578404; COSMIC: COSV52736779; COSMIC: COSV52736779; API