17-7670700-G-C

Variant names:

• chr17-7670700-G-C
• rs587782529
• NM_000546.6:c.1009C>G

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM1 PM2 PM5 PP3_Moderate

The NM_000546.6(TP53):​c.1009C>G​(p.Arg337Gly) 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 pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R337S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TP53 NM_000546.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.877

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PM1: In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 10 benign, 15 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 chr17-7670700-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 142536.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.919

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TP53	NM_000546.6	c.1009C>G	p.Arg337Gly	missense_variant	Exon 10 of 11	ENST00000269305.9	NP_000537.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TP53	ENST00000269305.9	c.1009C>G	p.Arg337Gly	missense_variant	Exon 10 of 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:1

Revision: criteria provided, single submitter

Submissions by phenotype

Li-Fraumeni syndrome Uncertain:1

Feb 19, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant has not been reported in the literature in individuals with TP53-related conditions. ClinVar contains an entry for this variant (Variation ID: 237938). This variant is not present in population databases (ExAC no frequency). This sequence change replaces arginine with glycine at codon 337 of the TP53 protein (p.Arg337Gly). The arginine residue is highly conserved and there is a moderate physicochemical difference between arginine and glycine. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt TP53 protein 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. This variant disrupts the p.Arg337 amino acid residue in TP53. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 10864200, 16033918, 16494995, 21192060, 23733769, 19717094, 20407015, 20426520, 12826609, 19454241, 29955864, 17606709, 9150393, 20478780, 9452042, 18511570, 20128691, 21343334, 9704931, 9704930). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.95
BayesDel_addAF	Pathogenic	0.28	D
BayesDel_noAF	Pathogenic	0.16
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.97	.;.;.;D;.;D;.;.
Eigen	Benign	0.11
Eigen_PC	Benign	-0.080
FATHMM_MKL	Uncertain	0.84	D
LIST_S2	Uncertain	0.97	D;D;.;.;.;D;D;D
M_CAP	Pathogenic	0.47	D
MetaRNN	Pathogenic	0.92	D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	3.0	.;.;.;M;.;M;.;.
PrimateAI	Benign	0.43	T
PROVEAN	Uncertain	-3.7	.;.;.;D;.;D;.;.
REVEL	Pathogenic	0.75
Sift	Uncertain	0.0050	.;.;.;D;.;D;.;.
Sift4G	Uncertain	0.051	T;T;D;D;D;D;D;D
Polyphen		0.99	.;.;.;D;.;D;.;.
Vest4		0.69
MutPred		0.80		.;.;.;Loss of MoRF binding (P = 0.0548);.;Loss of MoRF binding (P = 0.0548);.;.;
MVP		0.94
MPC		0.39
ClinPred		0.98	D
GERP RS		3.4
Varity_R		0.97
gMVP		0.71

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: rs587782529; hg19: chr17-7574018; COSMIC: COSV52816817; COSMIC: COSV52816817;