17-7673823-C-T

Variant names:

• chr17-7673823-C-T
• rs193920774
• NM_000546.6:c.797G>A

Variant summary

Our verdict is Pathogenic. The variant received 20 ACMG points: 20P and 0B. PS3 PM1 PM5 PP3_Strong PP5_Very_Strong

The NM_000546.6(TP53):​c.797G>A​(p.Gly266Glu) variant causes a missense change involving the alteration of a conserved nucleotide. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). ClinVar reports functional evidence for this variant: "SCV000322130: Functional studies have consistently found that TP53 Gly266Glu is not capable of transactivating typical p53 response elements, leads to a loss of growth suppression activity, and does not exhibit a dominant-negative effect (Campomenosi 2001, Monti 2002, Grochova 2008, Slovackova 2010, Kotler 2018). This variant is reported as having non-functional transactivation in the International Agency for Research on Cancer TP53 database based on functional assays by Kato et al. (2003)." and additional evidence is available in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G266V) has been classified as Likely pathogenic. The gene TP53 is included in the ClinGen Criteria Specification Registry.

• Frequency:
  • Genomes: 𝑓 0.0 (0 hom., cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: TP53 NM_000546.6 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:9 U:1 O:2
• Conservation: PhyloP100: 7.91
• Publications: 291 publications found

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 Gene-Disease associations (from GenCC):

• breast cancer

  Inheritance: AD Classification: DEFINITIVE Submitted by: Ambry Genetics
• Li-Fraumeni syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, G2P, Labcorp Genetics (formerly Invitae), Orphanet
• Li-Fraumeni syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Genomics England PanelApp
• adrenocortical carcinoma, hereditary

  Inheritance: AD Classification: STRONG Submitted by: Ambry Genetics
• sarcoma

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• bone marrow failure syndrome 5

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
• colorectal cancer

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
• choroid plexus carcinoma

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Specifications for TP53 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Pathogenic. The variant received 20 ACMG points.

• PS3: PS3 evidence extracted from ClinVar submissions: SCV000322130: Functional studies have consistently found that TP53 Gly266Glu is not capable of transactivating typical p53 response elements, leads to a loss of growth suppression activity, and does not exhibit a dominant-negative effect (Campomenosi 2001, Monti 2002, Grochova 2008, Slovackova 2010, Kotler 2018). This variant is reported as having non-functional transactivation in the International Agency for Research on Cancer TP53 database based on functional assays by Kato et al. (2003).; SCV000581084: Studies conducted in human cell lines indicate this alteration is deficient at growth suppression (Kotler E et al. Mol. Cell 2018 Jul;71:178-190.e8; Giacomelli AO et al. Nat. Genet. 2018 Oct;50:1381-1387).; SCV000931773: Experimental studies have shown that this missense change affects TP53 function (PMID: 11429705, 12826609, 12917626, 17724467, 20505364, 29979965, 30224644).; SCV004840289: Functional studies have reported this variant as defective in yeast based transcriptional activation assays, and human cell growth suppression and proliferation assays (PMID: 12826609, 29979965, 30224644).; SCV004931862: Functional studies indicate this variant impacts protein function [PMID: 29979965, 20505364].
• PM1: In a hotspot region, there are 37 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 8 benign, 36 uncertain in NM_000546.6
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr17-7673823-C-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 233303.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.99
• PP5: Variant 17-7673823-C-T is Pathogenic according to our data. Variant chr17-7673823-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 161516.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000546.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TP53	NM_000546.6	MANE Select	c.797G>A	p.Gly266Glu	missense	Exon 8 of 11	NP_000537.3
	TP53	NM_001126112.3		c.797G>A	p.Gly266Glu	missense	Exon 8 of 11	NP_001119584.1	K7PPA8
	TP53	NM_001407262.1		c.797G>A	p.Gly266Glu	missense	Exon 9 of 12	NP_001394191.1	K7PPA8

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TP53	ENST00000269305.9	TSL:1 MANE Select	c.797G>A	p.Gly266Glu	missense	Exon 8 of 11	ENSP00000269305.4	P04637-1
	TP53	ENST00000445888.6	TSL:1	c.797G>A	p.Gly266Glu	missense	Exon 8 of 11	ENSP00000391478.2	P04637-1
	TP53	ENST00000610292.4	TSL:1	c.680G>A	p.Gly227Glu	missense	Exon 7 of 10	ENSP00000478219.1	P04637-4

Frequencies

GnomAD3 genomes AF: 0.00 AC: 0 AN: 152024 Hom.: 0 Cov.: 31

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1461062 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 726788

African (AFR) AF: 0.00 AC: 0 AN: 33462

American (AMR) AF: 0.00 AC: 0 AN: 44536

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26116

East Asian (EAS) AF: 0.00 AC: 0 AN: 39676

South Asian (SAS) AF: 0.00 AC: 0 AN: 86130

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53386

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111618

Other (OTH) AF: 0.00 AC: 0 AN: 60370

GnomAD4 genome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 152024 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 74262

African (AFR) AF: 0.00 AC: 0 AN: 41392

American (AMR) AF: 0.00 AC: 0 AN: 15236

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5174

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10604

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68008

Other (OTH) AF: 0.00 AC: 0 AN: 2084

Alfa AF: 0.0000293 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
2	-	-	Hereditary cancer-predisposing syndrome (2)
2	-	-	Li-Fraumeni syndrome (2)
2	-	-	Li-Fraumeni syndrome 1 (2)
1	-	-	not provided (1)
1	-	-	Ovarian neoplasm (1)
-	1	-	Prostate cancer (1)
1	-	-	Squamous cell carcinoma of the head and neck (1)
-	-	-	Neoplasm (1)
-	-	-	Pleomorphic xanthoastrocytoma (1)

Computational scores

Source: dbNSFP v4.9

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	1.0
DEOGEN2	Pathogenic	0.86	D
Eigen	Pathogenic	0.89
Eigen_PC	Pathogenic	0.80
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.67	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	0.91	D
MutationAssessor	Pathogenic	3.3	M
PhyloP100		7.9
PrimateAI	Uncertain	0.72	T
PROVEAN	Pathogenic	-7.3	D
REVEL	Pathogenic	0.97
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.97
MutPred		0.93		Gain of phosphorylation at S269 (P = 0.1321)
MVP		0.99
MPC		0.43
ClinPred		1.0	D
GERP RS		5.1
PromoterAI		0.0010	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.98
gMVP		0.93
Mutation Taster		=0/100	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs193920774; hg19: chr17-7577141; COSMIC: COSV52664019; COSMIC: COSV52664019;