12-112502202-C-T
Variant summary
Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BA1BP4
This summary comes from the ClinGen Evidence Repository: The filtering allele frequency of the c.1658C>T (p.Thr553Met) variant in the PTPN11 gene (NM_002834.5(PTPN11):c.1658C>T (p.Thr553Met)) is 0.048% for European (Non-Finnish) chromosomes by the Exome Aggregation Consortium (49/66556 with 95% CI), which is a high enough frequency to be classified as benign based on thresholds defined by the ClinGen RASopathy Expert panel for autosomal dominant RASopathy variants (BA1). Computational prediction tools and conservation analysis suggest that the p.Thr553Met variant does not impact the protein (BP4). In summary, this variant meets criteria to be classified as benign. RASopathy-specific ACMG/AMP criteria applied: BA1, BP4 (Version 2.1; 09/17/2024). LINK:https://erepo.genome.network/evrepo/ui/classification/CA134644/MONDO:0021060/043
Frequency
Consequence
NM_002834.5 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -9 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
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PTPN11 | NM_002834.5 | c.1658C>T | p.Thr553Met | missense_variant | Exon 14 of 16 | ENST00000351677.7 | NP_002825.3 | |
PTPN11 | NM_001330437.2 | c.1670C>T | p.Thr557Met | missense_variant | Exon 14 of 16 | NP_001317366.1 | ||
PTPN11 | NM_001374625.1 | c.1655C>T | p.Thr552Met | missense_variant | Exon 14 of 16 | NP_001361554.1 | ||
PTPN11 | XM_011538613.3 | c.1667C>T | p.Thr556Met | missense_variant | Exon 14 of 16 | XP_011536915.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
PTPN11 | ENST00000351677.7 | c.1658C>T | p.Thr553Met | missense_variant | Exon 14 of 16 | 1 | NM_002834.5 | ENSP00000340944.3 | ||
PTPN11 | ENST00000635625.1 | c.1670C>T | p.Thr557Met | missense_variant | Exon 14 of 15 | 5 | ENSP00000489597.1 |
Frequencies
GnomAD3 genomes AF: 0.000440 AC: 67AN: 152100Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.000446 AC: 112AN: 251054Hom.: 0 AF XY: 0.000420 AC XY: 57AN XY: 135676
GnomAD4 exome AF: 0.000919 AC: 1343AN: 1461628Hom.: 1 Cov.: 31 AF XY: 0.000884 AC XY: 643AN XY: 727128
GnomAD4 genome AF: 0.000440 AC: 67AN: 152218Hom.: 0 Cov.: 32 AF XY: 0.000403 AC XY: 30AN XY: 74422
ClinVar
Submissions by phenotype
not provided Benign:8
PTPN11: BP4, BS1 -
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This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
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not specified Benign:5
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Variant summary: PTPN11 c.1658C>T (p.Thr553Met) results in a non-conservative amino acid change in 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 0.00044 in 283484 control chromosomes. The observed variant frequency is approximately 7 fold of the estimated maximal expected allele frequency for a pathogenic variant in PTPN11 causing Noonan Syndrome And Related Conditions phenotype (6.3e-05), strongly suggesting that the variant is benign. Particularly in an elderly control population, this variant was found at allele frequency of 0.003 (3/1000 chromosomes), strongly supporting for a benign outcome (Beaudoin_2012). c.1658C>T has been reported in the literature including a fetus with clinical features of Noonan syndrome without information of clinical follow-up (Lee_2008), one patient with neurofibromatosis type 1 who also carried an NF1 splice site variant (Sant_2015), three patients with myocardial Infarction (Beaudoin_2012), one patient with breast cancer (Maxwell_2016), one patient with glioblastoma multiforme (Sturla_2011/TCGA database) and one lymphoid neoplasm sample (COSMIC/PMID: 22675565). However, none of the published studies provide strong evidence for or against pathogenicity. This variant has been identified by LMM laboratory in 5 individuals with clinical features of Noonan syndrome. However, it was also identified in 3 parents of unrelated probands who were reportedly unaffected (LMM unpublished data), strongly supporting for benign outcome. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Multiple ClinVar submitters and one expert panel (ClinGen RASopathy Variant Curation Expert Panel) (evaluation after 2014) cite the variant as benign (n=4) and likely benign (n=10). Based on the evidence outlined above, the variant was classified as benign. -
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p.Thr553Met in exon 14 of PTPN11: This variant has been reported in the literatu re in a fetus with increased nuchal translucency, which is a prenatal feature of Noonan syndrome. However, follow-up clinical information was not provided for t his fetus (Lee 2008). This variant has been identified by our laboratory in 5 in dividuals with clinical features of Noonan syndrome. However, it was also identi fied in 3 parents of unrelated probands in our laboratory who were reportedly un affected (LMM unpublished data). In addition, this variant has been identified i n 49/66556 European chromosomes by the Exome Aggregation Consortium (ExAC, http: //exac.broadinstitute.org; dbSNP rs148176616). Threonine (Thr) at position 553 i s not conserved in mammals or evolutionarily distant species, supporting that a change at this position may be tolerated. Additional computational prediction t ools do not provide strong support for or against an impact to the protein. In s ummary, the p.Thr553Met variant is classified as likely benign based on its pres ence in multiple unaffected individuals and lack of conservation. -
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Noonan syndrome Uncertain:2
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RASopathy Benign:2
The filtering allele frequency of the c.1658C>T (p.Thr553Met) variant in the PTPN11 gene (NM_002834.5(PTPN11):c.1658C>T (p.Thr553Met)) is 0.048% for European (Non-Finnish) chromosomes by the Exome Aggregation Consortium (49/66556 with 95% CI), which is a high enough frequency to be classified as benign based on thresholds defined by the ClinGen RASopathy Expert panel for autosomal dominant RASopathy variants (BA1). Computational prediction tools and conservation analysis suggest that the p.Thr553Met variant does not impact the protein (BP4). In summary, this variant meets criteria to be classified as benign. RASopathy-specific ACMG/AMP criteria applied: BA1, BP4 (Version 2.1; 09/17/2024). -
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Metachondromatosis Benign:1
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Primary dilated cardiomyopathy;C0878544:Cardiomyopathy Benign:1
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PTPN11-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). -
Cardiovascular phenotype Benign:1
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. -
Juvenile myelomonocytic leukemia;C0410530:Metachondromatosis;C4551484:LEOPARD syndrome 1;C4551602:Noonan syndrome 1 Benign:1
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Noonan syndrome and Noonan-related syndrome Benign:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at