17-7676154-G-A

Position:

• chr17-7676154-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM2 PM5 BP4_Moderate

The NM_000546.6(TP53):​c.215C>T​(p.Pro72Leu) 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. 13/21 in silico tools predict a benign 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. P72R) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: TP53 NM_000546.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.44

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 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr17-7676154-G-C is described in Lovd as [Pathogenic].
• BP4: Computational evidence support a benign effect (MetaRNN=0.16614896).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TP53	NM_000546.6	c.215C>T	p.Pro72Leu	missense_variant	4/11	ENST00000269305.9	NP_000537.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TP53	ENST00000269305.9	c.215C>T	p.Pro72Leu	missense_variant	4/11	1	NM_000546.6	ENSP00000269305	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 6.84e-7 AC: 1 AN: 1461570 Hom.: 0 Cov.: 80 AF XY: 0.00000138 AC XY: 1 AN XY: 727076

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Li-Fraumeni syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 02, 2023

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 performed at Invitae incorporating data from internal and/or published experimental studies (PMID: 12826609, 29979965, 30224644) indicates that this missense variant is not expected to disrupt TP53 function. ClinVar contains an entry for this variant (Variation ID: 864652). 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 proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 72 of the TP53 protein (p.Pro72Leu). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.080
BayesDel_addAF	Uncertain	0.087	D
BayesDel_noAF	Benign	-0.11
CADD	Benign	13
DANN	Benign	0.55
DEOGEN2	Benign	0.018	T;T;.;T;.;.;.;.;.;.;T;.;.;T;T;.
Eigen	Benign	-0.93
Eigen_PC	Benign	-0.98
FATHMM_MKL	Benign	0.33	N
LIST_S2	Uncertain	0.87	D;D;.;.;.;D;D;.;D;D;D;D;D;D;D;D
M_CAP	Uncertain	0.18	D
MetaRNN	Benign	0.17	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Pathogenic	0.86	D
MutationAssessor	Benign	1.4	.;.;.;L;.;L;L;L;.;.;L;.;.;.;.;.
MutationTaster	Benign	1.0	N;N;N;N;N;N
PrimateAI	Benign	0.40	T
PROVEAN	Benign	-0.66	N;N;.;N;.;.;N;N;.;.;N;.;.;N;.;N
REVEL	Uncertain	0.34
Sift	Benign	0.087	T;T;.;T;.;.;T;D;.;.;T;.;.;T;.;T
Sift4G	Benign	0.48	T;T;T;T;T;T;T;T;T;T;T;T;T;.;T;.
Polyphen		0.29	B;.;.;B;.;B;B;B;.;.;B;.;.;B;.;.
Vest4		0.25
MutPred		0.26		Gain of stability (P = 0.0106);Gain of stability (P = 0.0106);.;Gain of stability (P = 0.0106);.;Gain of stability (P = 0.0106);Gain of stability (P = 0.0106);Gain of stability (P = 0.0106);.;.;Gain of stability (P = 0.0106);.;Gain of stability (P = 0.0106);Gain of stability (P = 0.0106);Gain of stability (P = 0.0106);Gain of stability (P = 0.0106);
MVP		0.89
MPC		0.69
ClinPred		0.045	T
GERP RS		1.9
Varity_R		0.073
gMVP		0.23

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: rs1042522; hg19: chr17-7579472;