rs63749841

Positions:

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 1P and 4B. PP3BP6_Strong

The NM_000251.3(MSH2):c.2437A>G(p.Met813Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000867 in 1,614,004 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 Uncertain significance (★★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000089 ( 0 hom. )

Consequence

MSH2
NM_000251.3 missense

Scores

Clinical Significance

Uncertain significance reviewed by expert panel U:10B:3

Conservation

PhyloP100: 8.85

Variant links:

Genes affected

MSH2 (HGNC:7325): (mutS homolog 2) This locus is frequently mutated in hereditary nonpolyposis colon cancer (HNPCC). When cloned, it was discovered to be a human homolog of the E. coli mismatch repair gene mutS, consistent with the characteristic alterations in microsatellite sequences (RER+ phenotype) found in HNPCC. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2012]

MSH2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.784

BP6

Variant 2-47478498-A-G is Benign according to our data. Variant chr2-47478498-A-G is described in ClinVar as [Uncertain_significance]. Clinvar id is 90972.Status of the report is reviewed_by_expert_panel, 3 stars. We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Benign=1, Uncertain_significance=9}. Variant chr2-47478498-A-G is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MSH2	NM_000251.3 linkuse as main transcript	c.2437A>G	p.Met813Val	missense_variant	14/16	ENST00000233146.7	NP_000242.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MSH2	ENST00000233146.7 linkuse as main transcript	c.2437A>G	p.Met813Val	missense_variant	14/16	1	NM_000251.3	ENSP00000233146	P1	P43246-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152204

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000119

AC:

AN:

251338

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135844

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000889

AC:

AN:

1461800

Hom.:

Cov.:

AF XY:

0.00000825

AC XY:

AN XY:

727192

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000899

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152204

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74362

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000192

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000118

Hom.:

Bravo

AF:

0.0000113

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:10Benign:3

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Lynch syndrome 1

Uncertain:4Benign:1

Uncertain significance, reviewed by expert panel	curation	International Society for Gastrointestinal Hereditary Tumours (InSiGHT)	Jun 13, 2018	Variant reclassification due to new tumour Likelihood Ratios: Multifactorial likelihood analysis posterior probabilty is in class 3. -
Uncertain significance, criteria provided, single submitter	clinical testing	Myriad Genetics, Inc.	Mar 22, 2023	This variant is classified as a variant of uncertain significance as there is insufficient evidence to determine its impact on protein function and/or cancer risk. -
Uncertain significance, criteria provided, single submitter	clinical testing	Mendelics	Jun 02, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Sep 06, 2022	- -
Likely benign, criteria provided, single submitter	clinical testing	Counsyl	Dec 12, 2015	- -

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jun 19, 2018	This variant is denoted MSH2 c.2437A>G at the cDNA level, p.Met813Val (M813V) at the protein level, and results in the change of a Methionine to a Valine (ATG>GTG). This variant has been identified in at least one individual with colon cancer whose tumor was shown to be microsatellite stable and exhibit expression of all four mismatch repair proteins on immunohistochemistry (Gille 2002, Wielders 2014). Functional assays conducted in mouse embryonic stem cells demonstrated that this variant displayed protein expression and mismatch repair activity comparable to wild type (Wielders 2014). MSH2 Met813Val was not observed at a significant allele frequency in large population cohorts (Lek 2016). MSH2 Met813Val is located in the ATPase domain (Lutzen 2008). In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function. Based on currently available information, it is unclear whether MSH2 Met813Val is pathogenic or benign. We consider it to be a variant of uncertain significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	May 17, 2023	In the published literature, this variant has been reported in individuals with Lynch syndrome (PMIDs: 31386297 (2019), 24501230 (2014), 12373605 (2002)) and healthy, unaffected individuals (PMID: 25637381 (2018)). Experimental studies report the variant does not impact MSH2 function (PMIDs: 33357406 (2021), 24501230 (2014)). The frequency of this variant in the general population, 0.000026 (3/113690 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is damaging. Based on the available information, we are unable to determine the clinical significance of this variant. -

Hereditary cancer-predisposing syndrome

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Nov 22, 2022	This missense variant replaces methionine with valine at codon 813 of the MSH2 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). This variant does not impact MSH2 function in a 6-thioguanine sensitivity assay in haploid human cells (internally defined LOF score threshold <= -1.32, PMID: 33357406). In another functional study, this variant caused no significant difference in microsatellite levels or DNA damage response compared to wild type (PMID: 24501230). This variant has been reported in individuals affected by colorectal cancer but with clinical features not indicative of Lynch syndrome (the tumors exhibited microsatellite stability and the presence of MSH2 protein (PMID: 12373605, 24501230)) and in individuals affected with cancer who did not meet Bethesda Lynch syndrome criteria (PMID: 31386297). This variant has been identified in 3/251338 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Nov 16, 2018	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. -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Jul 31, 2023

Variant summary: MSH2 c.2437A>G (p.Met813Val) results in a conservative amino acid change located in the DNA mismatch repair protein MutS, C-terminal domain (IPR000432) of the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 1.2e-05 in 251338 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.2437A>G has been reported in the literature in suspected or affected Lynch Syndrome individuals/families (example: Gille_2002, Wielders_2014, Kiyozumi_2019). These reports do not provide unequivocal conclusions about association of the variant with Lynch Syndrome. Co-occurrences with other pathogenic variant(s) have been reported (BRCA1 c.1961delA, p.Lys654fsX47; ATM c.2921+1G>T), providing supporting evidence for a benign role. Experimental evidence evaluating an impact on protein function demonstrated no reduction in protein level and no functional MMR defects for p.M813V and determined it to have similar function to the wild type. Furthermore, tumor analysis showed microsatellite stability and the presence of all four MMR proteins (Gille_2002, Wielders_2014). An additional study shows a neutral effect of the protein (Jia_2021). These data provide further supporting evidence for a benign role of the variant. The following publications have been ascertained in the context of this evaluation (PMID: 25637381, 18383312, 12373605, 33357406, 31386297, 24501230). Nine submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. Multiple submitters reported the variant with conflicting assessments; seven submitters classified it as a variant of uncertain significance, two classified it as liekly benign, and one classified it as benign. Based on the evidence outlined above, the variant was classified as VUS-possibly benign. -

Lynch syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Jan 18, 2023

The c.2437A>G (p.Met813Val) variant in MSH2 has been reported in 2 individuals with clinical features of Lynch syndrome (Gille 2002 PMID: 12373605, Wielders 2014 PMID: 24501230). It has also been identified in 0.003% (3/113690) of European (non-Finnish) chromosomes by gnomAD (http://gnomad.broadinstitute.org). This variant has also been reported in ClinVar (Variation ID 90972). Computational prediction tools and conservation analyses do not provide strong support for or against an impact to the protein. In vitro and in vivo functional studies provide some evidence that this variant does not impact protein function (Wielders 2014 PMID: 24501230), and a tumor derived from a patient with this variant was shown to be microsatellite stable (Gille 2002 PMID: 12373605). In summary, while the clinical significance of this variant is uncertain, these data suggest that it is more likely to be benign. ACMG/AMP Criteria applied: BS3, BS1_Supporting. -

Colorectal cancer, non-polyposis

Uncertain:1

Uncertain significance, no assertion criteria provided

research

CSER _CC_NCGL, University of Washington

Jun 01, 2014

- -

Hereditary nonpolyposis colorectal neoplasms

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 25, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.59

BayesDel_addAF

Pathogenic

0.39

BayesDel_noAF

Pathogenic

0.38

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.65

D;.;.;.

Eigen

Uncertain

0.43

Eigen_PC

Uncertain

0.51

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.97

D;D;D;D

M_CAP

Uncertain

0.15

MetaRNN

Pathogenic

0.78

D;D;D;D

MetaSVM

Uncertain

0.30

MutationAssessor

Pathogenic

3.0

M;.;.;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.68

PROVEAN

Benign

-1.9

N;N;.;N

REVEL

Pathogenic

0.81

Sift

Uncertain

0.0030

D;D;.;D

Sift4G

Uncertain

0.013

D;D;.;D

Polyphen

0.24

B;.;.;B

Vest4

0.87

MVP

0.98

MPC

0.0070

ClinPred

0.73

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.80

gMVP

0.83

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over