17-7673775-C-T
Variant summary
Our verdict is Uncertain significance. Variant got 5 ACMG points: 9P and 4B. PM1PM5PP3_StrongPP5BS2
The NM_000546.6(TP53):c.845G>A(p.Arg282Gln) variant causes a missense change. The variant allele was found at a frequency of 0.00000558 in 1,613,956 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R282W) has been classified as Likely pathogenic.
Frequency
Consequence
NM_000546.6 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 5 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
TP53 | NM_000546.6 | c.845G>A | p.Arg282Gln | missense_variant | 8/11 | ENST00000269305.9 | NP_000537.3 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
TP53 | ENST00000269305.9 | c.845G>A | p.Arg282Gln | missense_variant | 8/11 | 1 | NM_000546.6 | ENSP00000269305 | P1 |
Frequencies
GnomAD3 genomes AF: 0.0000132 AC: 2AN: 152074Hom.: 0 Cov.: 31
GnomAD3 exomes AF: 0.00000398 AC: 1AN: 251444Hom.: 0 AF XY: 0.00000736 AC XY: 1AN XY: 135892
GnomAD4 exome AF: 0.00000479 AC: 7AN: 1461882Hom.: 0 Cov.: 33 AF XY: 0.00000550 AC XY: 4AN XY: 727244
GnomAD4 genome AF: 0.0000132 AC: 2AN: 152074Hom.: 0 Cov.: 31 AF XY: 0.0000135 AC XY: 1AN XY: 74282
ClinVar
Submissions by phenotype
not specified Pathogenic:1Uncertain:2
Likely pathogenic, criteria provided, single submitter | clinical testing | ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories | Nov 07, 2016 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Genetic Services Laboratory, University of Chicago | May 19, 2021 | DNA sequence analysis of the TP53 gene demonstrated a sequence change, c.845G>A, in exon 8 that results in an amino acid change, p.Arg282Gln. This sequence change has been described in gnomAD with only one heterozygous individual from the Finnish sup-population (dbSNP rs730882008). The p.Arg282Gln change affects a highly conserved amino acid residue located in a domain of the TP53 protein that is known to be functional. The p.Arg282Gln substitution appears to be damaging using several in-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL). This sequence change has been reported in a female patient diagnosed at age one with neuroblastoma. This sequence change was reportedly inherited from one of her parents and the family history (a maternal aunt with lymphoma diagnosed at 44) was not highly suggestive of Li-Fraumeni syndrome (PMID:10864200). This variant has also been reported in individuals affected with breast cancer, lung cancer, and prostate cancer but without strong evidence for causality (PMID: 26976419, 26787237, 30450585). In one of the reported cases of prostate cancer, a likely pathogenic deletion in exon 13 of the PALB2 gene was also identified, providing supporting evidence for limited causality of the TP53 variant (PMID:30450585). This amino acid position is considered a TP53 mutation hotspot where several other amino acid changes have been reported in individuals and families with TP53-related cancers (p.Arg282Gly, p.rg282Pro, p.Arg282Leu, p.Arg282Trp) (PMIDs: 15850016, 27616075, 28975465, 1565143). Functional studies have shown no or partially disruptive effect of this variant on transactivation activity in yeast-based assays (PMID: 11429705, 11896595, 11920959, 12826609, 12909720, 12917626, 21343334) and no effect on the anti-proliferative function of TP53 protein in mammalian cell-based assays (PMID: 29979965, 30224644). In summary, the c.845G>A sequence change has been reported in the literature in individuals affected with a variety of cancers but not fulfilling classic Li-Fraumeni syndrome criteria. Additionally, functional evidences are inconclusive. Based on the overall available evidence, the clinical significance of the p.Arg282Gln in TP53 change remains unknown at this time and has been classified as variant of unknown significance. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Sep 29, 2020 | Variant summary: TP53 c.845G>A (p.Arg282Gln) results in a conservative amino acid change located in the DNA-binding domain (IPR011615) of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 4e-06 in 251444 control chromosomes (gnomAD). c.845G>A has been reported in the literature in individuals affected with a variety of cancers but not fulfilling the classic criteria of LFS or even the LFI (Li-Fraunemi Incomplete) criteria. In our review of the associated literature, the penetrance of Li-Fraumeni Syndrome (0.67) due to this variant appears to be lower than expected (0.8), therefore no conclusions can be drawn from these data. Specifically, this variant was observed in a patient with neuroblastoma and was reportedly inherited from one of her parents, but the family history (a female patient, diagnosed at age 1 with neuroblastoma, and a maternal aunt with lymphoma diagnosed at 44) was not suggestive of Li-Fraumeni syndrome (Chompret 2000). The variant has been also reported as germline variant in several other cancer patients, including lung-, breast-, prostate and colorectal cancer, but without strong evidence for causality (Meric-Bernstam_2016, Tung_2016, Monti_2007, Giri_2019, Stoltze_2018). In addition, in one of these reports a co-occurrence with another likely pathogenic variant has been reported (PALB2 exon 13 deletion; Giri_2019), providing supporting evidence for limited causality. Additional studies are needed to address the penetrance and cancer risks associated with TP53 pathogenic variation in patients outside LFS spectrum. Several publications reported experimental evidence evaluating an impact on protein function, and multiple yeast assays demonstrated that the variant decreased, but did not abolish the transactivation capacity of TP53 and has been reported as a partially deficient (PD) allele (e.g. Monti_2011, Andreotti_2011 , Resnick_2003, Shi_2002). On the other hand, further studies performed in yeast and in human cells, revealed that the variant could also result in a gain of function activity, by interfering with the function of other p53 family members and increasing the expression of genes involved in cell proliferation- and tumor formation (Monti_2003, Shi_2002, Cordani_2011). These data however do not allow unequivocal conclusions about the variant significance. Six other clinical diagnostic laboratories have submitted conflicting clinical-significance assements for this variant to ClinVar after 2014 (i.e. 4 calling it a VUS, while 2 classifying it as likely pathogenic). At-least two of these submissions reflect a re-evaluation from their original assessment in the pathogenic spectrum. Based on the overall evidence outlined above, the variant was re-classified from its initial assessment as Likely Pathogenic at our laboratory and has since retained its classification as a VUS-possibly pathogenic. - |
Li-Fraumeni syndrome 1 Pathogenic:1Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Baylor Genetics | Aug 26, 2023 | - - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Human Genome Sequencing Center Clinical Lab, Baylor College of Medicine | Sep 25, 2017 | The c.845G>A (p.Arg282Gln) variant in the TP53 gene has been reported as a germline change in two related individuals with a family history of cancer (PMID: 17606709). This variant has also been reported in individuals affected with breast cancer, lung cancer and neuroblastoma (PMID: 26976419, 26787237, 10864200). Experimental studies have shown that this missense change affects TP53 protein structure and function (PMID: 15982667, 19913028). A different pathogenic missense substitution at this codon (p.Arg282Trp) has been reported in multiple cancer patients (PMID: 1565143, 21059199, 21305319, 21761402, 22672556, 11370630, 25584008) suggesting that the arginine residue is critical for TP53 protein. Based upon the above evidence, this c.845G>A, p.Arg282Gln variant is classified as likely pathogenic. - |
not provided Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | CeGaT Center for Human Genetics Tuebingen | Mar 01, 2022 | TP53: PM1, PS3:Supporting - |
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Aug 18, 2024 | Identified in individuals with breast cancer, neuroblastoma, prostate cancer, or other tumors (PMID: 10864200, 25980754, 26787237, 26976419, 29324801, 32318955, 33008098, 32885271, 34863587, 35534704); Published functional studies demonstrate partially functional transactivation and retained growth suppression activity (PMID: 11429705, 12826609, 12909720, 21343334, 30224644, 29979965); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 21674059, 15982667, 18059157, 18555592, 11429705, 12909720, 24324553, 10864200, 12917626, 26787237, 26976419, 29324801, 27276561, 29126202, 27895058, 27463065, 29979965, 32560038, 17606709, 21343334, 11920959, 27346245, 18559976, 22361592, 27323394, 24603336, 19913028, 28821955, 30720243, 30840781, 32318955, 31447099, 30450585, 30327374, 30224644, 26585234, 26230955, 25952993, 23246812, 22915647, 22186996, 21519010, 20972454, 20407015, 19171880, 18453682, 16818505, 12826609, 11896595, 28638988, 28597078, 31588562, 30823914, 11782540, 28387325, 25980754, 27680515, 26619011, 27959731, 30352134, 29058119, 34863587, 35647242, 32885271, 38392212, 34273903, 30675318, 37937776, 33008098, 33574475, 15510160, 35534704, 38933650) - |
Hereditary cancer-predisposing syndrome Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Jul 21, 2023 | The p.R282Q variant (also known as c.845G>A), located in coding exon 7 of the TP53 gene, results from a G to A substitution at nucleotide position 845. The arginine at codon 282 is replaced by glutamine, an amino acid with highly similar properties. This alteration has been reported in a family in which the proband was diagnosed with neuroblastoma at 1 year of age and the proband's maternal aunt was diagnosed with lymphoma at 44 years of age (Chompret A et al. Br. J. Cancer. 2000 Jun;82(12):1932-1937). Functional studies conducted in yeast have demonstrated partially reduced transactivation activity compared to wild type (Campomenosi P et al. Oncogene. 2001 Jun;20:3573-9; Shi XB et al. Prostate. 2002 Apr;51:59-72; IARC TP53 database: Kato S et al. Proc. Natl. Acad. Sci. USA. 2003 Jul;100(14):8424-9; Monti P et al. Mol. Cancer Res. 2011 Mar;9:271-9). Studies conducted in human cell lines indicate this alteration remains proficient 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). Additional studies in human Saos-2 cell lines showed gain of function properties such as upregulation of several promoters, growth in soft agar, and an increase in DNA synthesis (Shi XB et al. Prostate. 2002 Apr;51:59-72). Crystal structural analysis predict this alteration may cause destabilization of the protein (Tu C et al. Acta Crystallogr. D Biol. Crystallogr. 2008 May;64:471-7). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. This alteration has been detected in the literature and numerous times in our laboratory, however, never in a case that meets classic Li-Fraumeni syndorme or Chompret criteria (Ambry internal data). Although this alteration has not been detected in individuals with Li-Fraumeni syndrome, we can not rule out the possibility that it is a low penetrance risk allele. Since supporting evidence is conflicting at this time, the clinical significance of this alteration remains unclear. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Aug 14, 2023 | This missense variant replaces arginine with glutamine at codon 282 in the DNA binding domain of the TP53 protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). Functional studies have shown no or partially disruptive effect of this variant on transactivation activity in yeast-based assays (PMID: 11429705, 11896595, 11920959, 12826609, 12909720, 12917626, 21343334) and no effect on the anti-proliferative function of TP53 protein in mammalian cell-based assays (PMID: 29979965, 30224644). This variant has been reported in an infant affected with neuroblastoma with history of lymphoma in her maternal aunt (PMID 10864200). This variant has been observed in an individual affected with lung cancer in his seventies, with family history of breast and prostate cancer in his siblings (PMID: 26787237). This variant has also been observed in individuals affected with breast cancer (PMID: 26976419) and glioneuronal tumor (PMID: 29058119), as well as in an individual affected with colorectal cancer with early-onset breast cancer history in her mother and maternal grandmother (PMID: 29324801). This variant has been identified in 1/251444 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Different variants affecting the same amino acid position (p.Arg282Trp, p.Arg282Pro) are considered to be disease-causing (ClinVar variation ID: 12364, 376659), suggesting that arginine at this position is important for protein function. However, the available clinical and functional evidence is insufficient to determine the role of the p.Arg282Gln variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. - |
Li-Fraumeni syndrome Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Nov 13, 2023 | This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 282 of the TP53 protein (p.Arg282Gln). This variant is present in population databases (no rsID available, gnomAD 0.004%). This missense change has been observed in individual(s) with clinical features of TP53-related conditions (PMID: 10864200, 17606709, 26787237, 26976419, 32318955). ClinVar contains an entry for this variant (Variation ID: 237956). Advanced modeling performed at Invitae incorporating data from internal and/or published experimental studies (PMID: 12826609, 29979965, 30224644) indicates that this missense variant is expected to disrupt TP53 function with a positive predictive value of 97.5%. Experimental studies have shown that this missense change affects TP53 function (PMID: 11429705, 11896595, 12826609, 12909720, 12917626, 15982667, 19913028, 21343334, 29979965). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. - |
Uncertain significance, criteria provided, single submitter | clinical testing | All of Us Research Program, National Institutes of Health | Nov 20, 2023 | This missense variant replaces arginine with glutamine at codon 282 in the DNA binding domain of the TP53 protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). Functional studies have shown no or partially disruptive effect of this variant on transactivation activity in yeast-based assays (PMID: 11429705, 11896595, 11920959, 12826609, 12909720, 12917626, 21343334) and no effect on the anti-proliferative function of TP53 protein in mammalian cell-based assays (PMID: 29979965, 30224644). This variant has been reported in an infant affected with neuroblastoma with history of lymphoma in her maternal aunt (PMID 10864200). This variant has been observed in an individual affected with lung cancer in his seventies, with family history of breast and prostate cancer in his siblings (PMID: 26787237). This variant has also been observed in individuals affected with breast cancer (PMID: 26976419) and glioneuronal tumor (PMID: 29058119), as well as in an individual affected with colorectal cancer with early-onset breast cancer history in her mother and maternal grandmother (PMID: 29324801). This variant has been identified in 1/251444 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Different variants affecting the same amino acid position (p.Arg282Trp, p.Arg282Pro) are considered to be disease-causing (ClinVar variation ID: 12364, 376659), suggesting that arginine at this position is important for protein function. However, the available clinical and functional evidence is insufficient to determine the role of the p.Arg282Gln variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. - |
Glioblastoma Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Prostate adenocarcinoma Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Carcinoma of esophagus Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Squamous cell carcinoma of the skin Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Gastric adenocarcinoma Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Squamous cell lung carcinoma Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Breast neoplasm Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Neoplasm of brain Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Malignant tumor of breast Pathogenic:1
Pathogenic, no assertion criteria provided | clinical testing | Department of Pathology and Laboratory Medicine, Sinai Health System | - | The TP53 p.Arg282Gln variant was identified in 4 of 6032 proband chromosomes (frequency: 0.0007) from individuals or families with neuroblastoma, breast cancer, lung cancer, or Lynch syndrome (Chrompret 2000, Meric-Bernstam 2016, Tung 2016, Yurgelun 2015). The variant was also identified in dbSNP (ID: rs730882008 as "With Likely pathogenic, Pathogenic allele"), ClinVar (2x as pathogenic by Invitae and Ambry Genetics; 2x as likely pathogenic by ARUP Laboratories and Integrated Genetics/Laboratory Corporation of America; and 1x as uncertain significance by GeneDx), Cosmic (37x in Skin, Bone, Hematopoietic and lymphoid tissue, Upper aerodigestive tract or Large intestine), and the IARC TP53 Database (identified 2x in germline and 30x as somatic; classified as partially functional). The variant was not identified in the GeneInsight-COGR or LOVD 3.0 databases. The variant was identified in control databases in 2 of 277176 chromosomes at a frequency of 0.000007 (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: European Non-Finnish in 1 of 126670 chromosomes (freq: 0.000008) and Finnish in 1 of 25792 chromosomes (freq: 0.00004), while the variant was not observed in the African, Other, Latino, Ashkenazi Jewish, East Asian, or South Asian populations. Multiple studies using a yeast functional reporter assay have classified this variant as loss of function and concluded that this variant does not possess dominant negative activity (Hassan 2008, Shi 2002). The p.Arg282 residue is conserved across mammals and other organisms, and 4 of 5 computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) suggest that the Arg282Gln variant may impact the protein; this information alone is not predictive enough to assume pathogenicity. However, the residue is located in the DNA-binding domain of TP53 and the Arg282Gln variant has been shown to accelerate the protein unfolding rate, possibly facilitating loss of protein function (Butler 2005). In summary, based on the above information this variant meets our laboratory’s criteria to be classified as pathogenic. - |
Neoplasm of the large intestine Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Hepatocellular carcinoma Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Papillary renal cell carcinoma type 1 Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Ovarian serous cystadenocarcinoma Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Malignant melanoma of skin Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Malignant neoplasm of body of uterus Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Pancreatic adenocarcinoma Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Lung adenocarcinoma Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Non-Hodgkin lymphoma Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Transitional cell carcinoma of the bladder Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Squamous cell carcinoma of the head and neck Pathogenic:1
Likely pathogenic, no assertion criteria provided | literature only | Database of Curated Mutations (DoCM) | May 31, 2016 | - - |
Hereditary breast ovarian cancer syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | curation | German Consortium for Hereditary Breast and Ovarian Cancer, University Hospital Cologne | Jan 09, 2024 | . According to the ClinGen ACMG TP53 v1.4.0 criteria we chose these criteria: PM1 (medium pathogenic): This rule can be applied to variants in hot spots (codons 175, 245, 248, 249, 273, 282), PP3 (supporting pathogenic): AGVGD: C35, BayesDEL:0.477696 Fortuno et al. 2019 high probabilty of pathogenicity (>99%), BS3 (supporting benign): Kato 2003: partially functional / Giacomelli 2018: unclassified / Kotler 2018: no LoF RFS score: -1,61029460421 [cutoff RFS score > −1.0 for LOF and RFS score < −1.0 for noLOF] - |
Adrenocortical carcinoma, hereditary Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Baylor Genetics | Feb 26, 2024 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at