rs202217267

Positions:

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS2

The NM_000546.6(TP53):c.97-9C>T variant causes a splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000123 in 1,613,938 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00012 ( 0 hom. )

Consequence

TP53
NM_000546.6 splice_polypyrimidine_tract, intron

Scores

Splicing: ADA: 0.0009155

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:11

Conservation

PhyloP100: 0.0190

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]

TP53 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.79).

BP6

Variant 17-7676281-G-A is Benign according to our data. Variant chr17-7676281-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 182945.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=7, Benign=3, Uncertain_significance=1}.

BS2

High AC in GnomAd4 at 16 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TP53	NM_000546.6 linkuse as main transcript	c.97-9C>T		splice_polypyrimidine_tract_variant, intron_variant		ENST00000269305.9	NP_000537.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TP53	ENST00000269305.9 linkuse as main transcript	c.97-9C>T		splice_polypyrimidine_tract_variant, intron_variant		1	NM_000546.6	ENSP00000269305	P1	P04637-1

Frequencies

GnomAD3 genomes

AF:

0.000105

AC:

AN:

152056

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000221

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000140

AC:

AN:

250376

Hom.:

AF XY:

0.000170

AC XY:

AN XY:

135360

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000579

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000479

Gnomad NFE exome

AF:

0.000282

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000124

AC:

182

AN:

1461882

Hom.:

Cov.:

AF XY:

0.000143

AC XY:

104

AN XY:

727242

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.000152

Gnomad4 OTH exome

AF:

0.000149

GnomAD4 genome

AF:

0.000105

AC:

AN:

152056

Hom.:

Cov.:

AF XY:

0.0000808

AC XY:

AN XY:

74244

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000221

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.000113

Hom.:

Bravo

AF:

0.0000869

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:11

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Benign:4

Likely benign, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Aug 15, 2023	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Jun 10, 2014	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	May 26, 2020	Variant summary: TP53 c.97-9C>T alters a non-conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. 4/4 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.00014 in 250376 control chromosomes. The observed variant frequency is approximately 3.5 fold of the estimated maximal expected allele frequency for a pathogenic variant in TP53 causing Li-Fraumeni Syndrome phenotype (4e-05), strongly suggesting that the variant is benign. To our knowledge, no occurrence of c.97-9C>T in individuals affected with Li-Fraumeni Syndrome and no experimental evidence demonstrating its impact on protein function have been reported. Four clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation (likely benign, n=3; VUS, n=1). Based on the evidence outlined above, the variant was classified as benign. -
Likely benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Feb 26, 2020	- -

Li-Fraumeni syndrome 1

Uncertain:1Benign:2

Likely benign, no assertion criteria provided	clinical testing	Department of Pathology and Laboratory Medicine, Sinai Health System	-	The TP53 c.97-9C>T variant was not identified in the literature nor was it identified in the LOVD 3.0 or UMD-LSDB databases. The variant was identified in dbSNP (ID: rs202217267) as "With other allele" and ClinVar (classified as benign by GeneDx; as likely benign by Invitae, Color and Quest Diagnostics Nichols Institute San Juan Capistrano; and as uncertain significance by Counsyl). The variant was identified in control databases in 35 of 276116 chromosomes at a frequency of 0.0001 (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: European in 32 of 126596 chromosomes (freq: 0.0003, increasing the likelihood this could be a low frequency benign variant), Latino in 2 of 34398 chromosomes (freq: 0.00006), and Finnish in 1 of 24966 chromosomes (freq: 0.00004), while it was not observed in the African, Other, Ashkenazi Jewish, East Asian, or South Asian populations. The c.97-9C>T variant is located in the 3' splice region but does not affect the invariant -1 and -2 positions. Positions -3 and -5 to -12 are part of the splicing consensus sequence and variants involving these positions sometimes affect splicing; however, in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. In summary, based on the above information, the clinical significance of this variant cannot be determined with certainty at this time although we would lean towards a more benign role for this variant. This variant is classified as likely benign. -
Likely benign, criteria provided, single submitter	clinical testing	Myriad Genetics, Inc.	Apr 11, 2023	This variant is considered likely benign. This variant is intronic and is not expected to impact mRNA splicing. -
Uncertain significance, criteria provided, single submitter	clinical testing	Counsyl	Apr 20, 2016	- -

Li-Fraumeni syndrome

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Feb 01, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	All of Us Research Program, National Institutes of Health	Jan 11, 2024	- -

Hereditary cancer-predisposing syndrome

Benign:2

Benign, criteria provided, single submitter	curation	Sema4, Sema4	Mar 24, 2021	- -
Likely benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Apr 27, 2016	- -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Quest Diagnostics Nichols Institute San Juan Capistrano

May 04, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.79

CADD

Benign

0.76

DANN

Benign

0.37

RBP_binding_hub_radar

0.85

RBP_regulation_power_radar

2.1

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00092

dbscSNV1_RF

Benign

0.022

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over