NM_000546.6:c.31G>C
Variant summary
Our verdict is Benign. Variant got -11 ACMG points: 0P and 11B. BP4_ModerateBP6BS1BS2
The NM_000546.6(TP53):āc.31G>Cā(p.Glu11Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000117 in 1,613,940 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Consequence
NM_000546.6 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -11 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.0000592 AC: 9AN: 151988Hom.: 0 Cov.: 31
GnomAD3 exomes AF: 0.0000518 AC: 13AN: 250748Hom.: 0 AF XY: 0.0000442 AC XY: 6AN XY: 135766
GnomAD4 exome AF: 0.000123 AC: 180AN: 1461834Hom.: 1 Cov.: 35 AF XY: 0.000140 AC XY: 102AN XY: 727210
GnomAD4 genome AF: 0.0000592 AC: 9AN: 152106Hom.: 0 Cov.: 31 AF XY: 0.0000807 AC XY: 6AN XY: 74364
ClinVar
Submissions by phenotype
not specified Uncertain:1Benign:2
The p.Glu11Gln variant in TP53 has been reported as a somatic variant in breast, lung, prostate, and colorectal cancers (COSMIC database, http://cancer.sanger.a c.uk/cosmic) and as a germline variant in 3 individuals with a variety of cancer s, including Lynch-syndrome associated cancers, intracranial germ cell tumors, a nd myelodysplastic/myeloproliferative disease (Ismael 2012, Wang 2014, Yurgelun 2015). Ismael et al. reported the variant in a child with myelodysplastic diseas e but also in the mother and two sisters. The authors do not provide clinical da ta for these relatives but this finding raises suspicion that the variant may no t cause disease. This variant has also been reported in ClinVar (Variation ID 41 723). It has also been identified in 4/8534 of East Asian chromosomes by the Ex ome Aggregation Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs201382 018). Computational prediction tools and conservation analysis do not provide st rong support for or against an impact to the protein. In summary, the clinical s ignificance of the p.Glu11Gln variant is uncertain. -
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Variant summary: TP53 c.31G>C (p.Glu11Gln) results in a conservative amino acid change located in the p53 transactivation domain of the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00012 in 1613940 control chromosomes, predominantly at a frequency of 0.0042 within the East Asian subpopulation in the gnomAD database (v4.1.0), including 1 homozygote. The observed variant frequency within East Asian control individuals in the gnomAD database is approximately 106 fold of the estimated maximal expected allele frequency for a pathogenic variant in TP53 causing Li-Fraumeni Syndrome phenotype (4e-05). A recent report assessing population prevalence estimates of germline TP53 variants based on a gnomAD-based analysis classified this variant as likely benign (e.g., Andrade_2019). c.31G>C has been reported in the literature predominantly in East Asian individuals affected with various cancer types including myelodysplastic/myeloproliferative disease, breast cancer, ovarian cancer, gastric cancer and Lynch syndrome, without strong evidence for causality (e.g., Yurgelun_2015, Lee_2015, Takenaka_2015, Uji_2014, Yamaguchi_2016, Zerdoumi_2017, Terashima_2019). These reports do not provide unequivocal conclusions about association of the variant with Li-Fraumeni Syndrome. At least one publication reports experimental evidence evaluating an impact on protein function. The most pronounced variant effect results in alteration of the p53 transcriptional activity (~70% residual activity), similar to that observed with well characterized dominant-negative missense mutations suggesting that it might be a bona fide dominant-negative mutation (e.g., Zerdoumi_2017). The following publications have been ascertained in the context of this evaluation (PMID: 25980754, 26527317, 25846456, 23973262, 27545002, 28369373, 30352134, 31666926, 12826609, 18199664). ClinVar contains an entry for this variant (Variation ID: 41723). Based on the evidence outlined above, the variant was classified as likely benign. -
not provided Uncertain:1Benign:2
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In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 24896186, 28251968, 21380628, 30840781, 22703879, 25846456, 23973262, 25980754, 27545002, 28466600, 22571758, 28369373, 18199664, 28724667, 28472496, 12826609, 31321604, 30224644, 11397945, 15510160, 33257846, 30936070, 32941702, 34478609, 34736091, 34069252) -
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Li-Fraumeni syndrome Uncertain:1Benign:1Other:1
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Variant interpreted as Likely benign and reported on 04-16-2020 by Lab Invitae. GenomeConnect-Invitae Patient Insights Network assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. Registry team members make no attempt to reinterpret the clinical significance of the variant. Phenotypic details are available under supporting information. -
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Hereditary cancer-predisposing syndrome Benign:3
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This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -
Li-Fraumeni syndrome 1 Uncertain:1
This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -
Hereditary breast ovarian cancer syndrome Uncertain:1
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TP53-related disorder Benign:1
This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at