rs1555526335

Positions:

• chr17-7675235-T-A
• chr17-7675235-T-C
• chr17-7675235-T-G

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1 PM2 PM5 PP3_Strong

The NM_000546.6(TP53):​c.377A>T​(p.Tyr126Phe) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y126C) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: TP53 NM_000546.6 missense, splice_region
• Scores: Splicing: ADA: 0.8222
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.97

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 Pathogenic. Variant got 10 ACMG points.

• PM1: In a hotspot region, there are 10 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 3 benign, 15 uncertain in NM_000546.6
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr17-7675235-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 458541.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=1, Pathogenic=1, Uncertain_significance=4}.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.963

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TP53	NM_000546.6	c.377A>T	p.Tyr126Phe	missense_variant, splice_region_variant	5/11	ENST00000269305.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TP53	ENST00000269305.9	c.377A>T	p.Tyr126Phe	missense_variant, splice_region_variant	5/11	1	NM_000546.6	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Pathogenic	0.36	D
BayesDel_noAF	Pathogenic	0.28
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.70	D;D;.;D;.;.;.;.;.;.;D;.;.;D;D;.
Eigen	Pathogenic	0.77
Eigen_PC	Pathogenic	0.75
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.97	D;D;.;.;.;D;D;.;D;D;D;D;D;T;D;D
M_CAP	Pathogenic	0.78	D
MetaRNN	Pathogenic	0.96	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	0.96	D
MutationAssessor	Uncertain	2.7	.;.;.;M;.;M;M;M;.;.;M;.;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Uncertain	0.70	T
PROVEAN	Uncertain	-3.1	D;D;.;D;.;.;D;D;.;.;D;.;.;D;D;D
REVEL	Pathogenic	0.87
Sift	Benign	0.042	D;D;.;D;.;.;D;D;.;.;D;.;.;D;D;D
Sift4G	Benign	0.093	T;T;T;T;T;T;T;T;T;T;T;T;T;.;.;.
Polyphen		1.0	D;.;.;P;.;P;D;P;.;.;P;.;.;D;.;.
Vest4		0.74
MutPred		0.85		Loss of catalytic residue at T123 (P = 0.1258);Loss of catalytic residue at T123 (P = 0.1258);.;Loss of catalytic residue at T123 (P = 0.1258);.;Loss of catalytic residue at T123 (P = 0.1258);Loss of catalytic residue at T123 (P = 0.1258);Loss of catalytic residue at T123 (P = 0.1258);.;.;Loss of catalytic residue at T123 (P = 0.1258);.;.;.;Loss of catalytic residue at T123 (P = 0.1258);Loss of catalytic residue at T123 (P = 0.1258);
MVP		0.96
MPC		1.6
ClinPred		0.95	D
GERP RS		5.5
Varity_R		0.80
gMVP		0.49

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.82
dbscSNV1_RF	Pathogenic	0.83
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: chr17-7578553;