chr17-7670643-C-A

Variant names:

• chr17-7670643-C-A
• NM_000546.6:c.1066G>T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_000546.6(TP53):​c.1066G>T​(p.Gly356Trp) 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. 14/21 in silico tools predict 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, single submitter U:1
• Conservation: PhyloP100: 0.965

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 Uncertain_significance. Variant got 3 ACMG points.

• PM1: In a region_of_interest Interaction with HIPK1 (size 270) in uniprot entity P53_HUMAN there are 62 pathogenic changes around while only 6 benign (91%) in NM_000546.6
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.31840938).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TP53	NM_000546.6	c.1066G>T	p.Gly356Trp	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.1066G>T	p.Gly356Trp	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

May 24, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. 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. This variant has not been reported in the literature in individuals affected with TP53-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glycine, which is neutral and non-polar, with tryptophan, which is neutral and slightly polar, at codon 356 of the TP53 protein (p.Gly356Trp). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.18
BayesDel_addAF	Uncertain	0.022	T
BayesDel_noAF	Benign	-0.21
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.74	.;.;.;D;.;D;.;.
Eigen	Benign	-0.0081
Eigen_PC	Benign	-0.061
FATHMM_MKL	Benign	0.24	N
LIST_S2	Benign	0.84	T;T;.;.;.;T;T;T
M_CAP	Benign	0.050	D
MetaRNN	Benign	0.32	T;T;T;T;T;T;T;T
MetaSVM	Uncertain	-0.11	T
MutationAssessor	Benign	1.9	.;.;.;L;.;L;.;.
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-0.58	.;.;.;N;.;N;.;.
REVEL	Benign	0.27
Sift	Uncertain	0.0080	.;.;.;D;.;D;.;.
Sift4G	Uncertain	0.017	D;D;D;D;D;D;D;D
Polyphen		0.97	.;.;.;D;.;D;.;.
Vest4		0.42
MutPred		0.39		.;.;.;Gain of solvent accessibility (P = 0.0328);.;Gain of solvent accessibility (P = 0.0328);.;.;
MVP		0.91
MPC		0.36
ClinPred		0.64	D
GERP RS		3.4
Varity_R		0.33
gMVP		0.35

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-7573961; COSMIC: COSV52676335; COSMIC: COSV52676335;