rs143329068
Variant summary
Our verdict is Likely benign. The variant received -2 ACMG points: 3P and 5B. PM1PP2BP6BS2
The NM_001370259.2(MEN1):c.511C>T(p.Arg171Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000533 in 1,613,960 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. R171Q) has been classified as Benign.
Frequency
Consequence
NM_001370259.2 missense
Scores
Clinical Significance
Conservation
Publications
- multiple endocrine neoplasia type 1Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P, ClinGen, Orphanet, Ambry Genetics
- familial isolated hyperparathyroidismInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- pituitary gigantismInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- hereditary pheochromocytoma-paragangliomaInheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
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ACMG classification
Our verdict: Likely_benign. The variant received -2 ACMG points.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt | 
|---|---|---|---|---|---|---|---|---|
| MEN1 | NM_001370259.2 | c.511C>T | p.Arg171Trp | missense_variant | Exon 3 of 10 | ENST00000450708.7 | NP_001357188.2 | 
Ensembl
Frequencies
GnomAD3 genomes  0.0000854  AC: 13AN: 152140Hom.:  0  Cov.: 32 show subpopulations 
GnomAD2 exomes  AF:  0.0000638  AC: 16AN: 250926 AF XY:  0.0000589   show subpopulations 
GnomAD4 exome  AF:  0.0000499  AC: 73AN: 1461820Hom.:  0  Cov.: 33 AF XY:  0.0000413  AC XY: 30AN XY: 727204 show subpopulations 
Age Distribution
GnomAD4 genome  0.0000854  AC: 13AN: 152140Hom.:  0  Cov.: 32 AF XY:  0.0000807  AC XY: 6AN XY: 74314 show subpopulations 
Age Distribution
ClinVar
Submissions by phenotype
Multiple endocrine neoplasia, type 1    Uncertain:3Benign:3 
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. -
The MEN1 c.511C>T (p.Arg171Trp) missense change has a maximum subpopulation frequency of 0.028% in gnomAD v2.1.1 (https://gnomad.broadinstitute.org/). This variant was observed in a Danish individual with primary hyperparathyroidism (PMID: 16563611). The in silico tool REVEL predicts a deleterious effect on protein function, however functional studies indicate that this variant does not significantly reduce menin expression compared to the wild-type (PMID: 21819486). In summary, the evidence currently available is insufficient to determine the clinical significance of this variant. It has therefore been classified as of uncertain significance. -
This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -
This missense variant replaces arginine with tryptophan at codon 171 of the MEN1 protein. Computational prediction is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). A functional study has reported that this variant does not impact MEN1 protein stability (PMID: 21819486). This variant has been reported in an individual affected with primary hyperparathyroidism (PMID: 16563611). This variant has been identified in 20/282320 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Although there is a suspicion that this variant may not be associated with disease, additional studies are necessary to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
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not specified    Uncertain:2 
Variant identified in a genome or exome case(s) and assessed due to predicted null impact of the variant or pathogenic assertions in the literature or databases. Disclaimer: This variant has not undergone full assessment. The following are preliminary notes: Reported in 1 proband, multiple reports classify as non-pathogenic; ClinVar: 1 LB -
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not provided    Uncertain:1 
Published functional studies demonstrated that this variant did not significantly impact MEN1 protein expression (PMID: 21819486); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Observed in an individual with primary hyperparathyroidism (PMID: 16563611); Also known as c.526C>T, c.621C>T, or p.(R176W); This variant is associated with the following publications: (PMID: 25637381, 19068082, 17879353, 16563611, 35268848, 9989505, 21819486) -
MEN1-related disorder    Uncertain:1 
The MEN1 c.526C>T variant is predicted to result in the amino acid substitution p.Arg176Trp. This variant has been identified in an individual with hyperparathyroidism (reported as p.Arg171Trp in Table 2, Jäger et al. 2006. PubMed ID: 16563611). This variant is reported in 0.028% of alleles in individuals of African descent in gnomAD and has conflicting interpretations regarding its pathogenicity in ClinVar, ranging from benign to uncertain (https://www.ncbi.nlm.nih.gov/clinvar/variation/161294/). An in vitro study suggests this variant is only slightly less stable compared to the normal protein (Figure 3, Shimazu et al. 2011. PubMed ID: 21819486). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -
Ovarian cancer    Benign:1 
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Hereditary cancer-predisposing syndrome    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. -
Hyperparathyroidism    Benign:1 
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Computational scores
Source: 
Splicing
 Find out detailed SpliceAI scores and Pangolin per-transcript scores at