7-116771936-C-T
Variant summary
Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2
The NM_000245.4(MET):c.2975C>T(p.Thr992Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0108 in 1,613,864 control chromosomes in the GnomAD database, including 125 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_000245.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -13 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
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MET | NM_000245.4 | c.2975C>T | p.Thr992Ile | missense_variant | Exon 14 of 21 | ENST00000397752.8 | NP_000236.2 | |
MET | NM_001127500.3 | c.3029C>T | p.Thr1010Ile | missense_variant | Exon 14 of 21 | NP_001120972.1 | ||
MET | NM_001324402.2 | c.1685C>T | p.Thr562Ile | missense_variant | Exon 13 of 20 | NP_001311331.1 | ||
MET | XM_011516223.2 | c.3032C>T | p.Thr1011Ile | missense_variant | Exon 15 of 22 | XP_011514525.1 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.00881 AC: 1341AN: 152150Hom.: 8 Cov.: 32
GnomAD3 exomes AF: 0.00789 AC: 1962AN: 248630Hom.: 11 AF XY: 0.00812 AC XY: 1095AN XY: 134836
GnomAD4 exome AF: 0.0110 AC: 16025AN: 1461596Hom.: 117 Cov.: 32 AF XY: 0.0109 AC XY: 7920AN XY: 727098
GnomAD4 genome AF: 0.00881 AC: 1341AN: 152268Hom.: 8 Cov.: 32 AF XY: 0.00878 AC XY: 654AN XY: 74446
ClinVar
Submissions by phenotype
not provided Benign:8
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Variant summary: The c.3029C>T (p.Thr1010Ile) in MET gene is a missense change that involves a conserved nucleotide and 3/4 in silico tools predict deleterious outcome. The variant falls into c-MET JM domain that regulates cytoskeletal functions: adhesion, motility, and migration and Mutation in this domain were shown to enhance lung cancer tumorigenicity in vitro. The variant is present in the control population dataset of ExAC and published general population data at an overall frequency 0.008 (962/1217700 chrs tested) including 6 homozygotes. It has particularly higher frequency in African subpopulation with an allele frequency of 2% (134/6576 chromosomes). These frequencies exceed the estimated maximum allele frequency for a pathogenic allele in this gene (0.0000015). The variant has been reported in healthy individuals and metastatic breast cancer, lung cancer and colorectal cancer patients (Liu_2015, Agrawal_2015). However, it has not been associated with increased risk for developing breast cancer in large genome wide association studies and previous laboratory studies have reported conflicting functional effects for the T1010I variant in NIH3T3 fibroblast and murine myeloid BA/F3 cell line models as discussed by Liu et al (Agrawal_2015). The variant is reported as Benign/VUS/Functional Polymorphism by a multiple reputable databases/clinical laboratories and published reports. Taken together, the variant was classified as Benign. -
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MET: BS1, BS2 -
not specified Benign:7Other:1
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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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Papillary renal cell carcinoma type 1 Benign:4
The MET c.3029C>T (p.Thr1010Ile) missense change is present at a maximum non-founder subpopulation frequency of 1.2% in gnomAD v2.1.1 (https://gnomad.broadinstitute.org/variant/7-116411990-C-T?dataset=gnomad_r2_1). This population frequency is higher than expected for a pathogenic variant in MET causing predisposition to hereditary papillary renal cell carcinoma (BS1). This variant has also been reported as homozygous 13 times in the gnomAD v2.1.1 database which suggests that this is a benign polymorphism (BS2). In silico tools are not in agreement about the effect on the gene or protein function, and functional studies have reported conflicting effects in cell line models (PMIDs: 14559814, 25605252). This variant has been identified in individuals with colorectal cancer (PMID: 21970370), metastatic breast cancer (PMID: 25605252), and those without a personal or family history of hereditary papillary renal cell carcinoma (internal data). In summary, this variant meets criteria to be classified as benign based on the ACMG/AMP criteria: BS1, BS2. -
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This variant is considered likely benign. This variant has been observed at a population frequency that is significantly greater than expected given the associated disease prevalence and penetrance. -
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 and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
Hereditary cancer-predisposing syndrome Uncertain:1Benign:2
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This alteration is classified as 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. -
Classic Hodgkin lymphoma Uncertain:1
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Congenital diaphragmatic hernia Uncertain:1
It is unclear whether these changes, alone or in aggregate, are contributing to the development of CDH in this family. -
MET-related disorder Benign:1
This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -
Renal cell carcinoma Benign:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at