17-7673337-G-C

Variant names:

• chr17-7673337-G-C
• rs750031971
• ENST00000420246.6:c.996C>G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The ENST00000420246.6(TP53):​c.996C>G​(p.Asp332Glu) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000139 in 1,433,880 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/18 in silico tools predict a benign outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. D332D) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: TP53 ENST00000420246.6 missense, splice_region
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0780
• Publications: 0 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: Labcorp Genetics (formerly Invitae), G2P, ClinGen, 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

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.06095484).

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000420246.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TP53	NM_000546.6	MANE Select	c.993+198C>G		intron	N/A	NP_000537.3
	TP53	NM_001126114.3		c.996C>G	p.Asp332Glu	missense splice_region	Exon 10 of 12	NP_001119586.1
	TP53	NM_001407268.1		c.996C>G	p.Asp332Glu	missense splice_region	Exon 10 of 12	NP_001394197.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TP53	ENST00000420246.6	TSL:1	c.996C>G	p.Asp332Glu	missense splice_region	Exon 10 of 12	ENSP00000391127.2
	TP53	ENST00000622645.4	TSL:1	c.879C>G	p.Asp293Glu	missense splice_region	Exon 10 of 12	ENSP00000482222.1
	TP53	ENST00000510385.5	TSL:1	c.600C>G	p.Asp200Glu	missense splice_region	Exon 6 of 8	ENSP00000478499.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000139 AC: 2 AN: 1433880 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 712308

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 32904

American (AMR) AF: 0.00 AC: 0 AN: 41074

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25742

East Asian (EAS) AF: 0.00 AC: 0 AN: 39146

South Asian (SAS) AF: 0.00 AC: 0 AN: 83702

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52440

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5726

European-Non Finnish (NFE) AF: 0.00000183 AC: 2 AN: 1093748

Other (OTH) AF: 0.00 AC: 0 AN: 59398

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.0296732), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.012	T
BayesDel_noAF	Benign	-0.25
CADD	Benign	5.0
DANN	Benign	0.93
DEOGEN2	Benign	0.0085	T
Eigen	Benign	-0.91
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.68	D
LIST_S2	Benign	0.28	T
M_CAP	Benign	0.049	D
MetaRNN	Benign	0.061	T
MetaSVM	Uncertain	0.63	D
PhyloP100		-0.078
PROVEAN	Benign	0.28	N
REVEL	Benign	0.24
Sift	Benign	0.84	T
Sift4G	Benign	0.54	T
Polyphen		0.27	B
Vest4		0.071
MutPred		0.20		Loss of sheet (P = 0.0357)
MVP		0.68
ClinPred		0.063	T
GERP RS		-0.90
PromoterAI		0.011	Neutral

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs750031971; hg19: chr17-7576655;