2-47429786-A-G

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_ModerateBP6

The NM_000251.3(MSH2):c.1121A>G(p.Gln374Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000112 in 1,614,028 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

MSH2
NM_000251.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:6

Conservation

PhyloP100: 8.44

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.

BP4

Computational evidence support a benign effect (MetaRNN=0.21692014).

BP6

Variant 2-47429786-A-G is Benign according to our data. Variant chr2-47429786-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 231153.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Benign=2, Uncertain_significance=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MSH2	NM_000251.3 link	c.1121A>G	p.Gln374Arg	missense_variant	Exon 7 of 16	ENST00000233146.7	NP_000242.1	P43246-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MSH2	ENST00000233146.7 link	c.1121A>G	p.Gln374Arg	missense_variant	Exon 7 of 16	1	NM_000251.3	ENSP00000233146.2		P43246-1

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152190

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:

0.00116

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:

0.0000676

AC:

AN:

251398

Hom.:

AF XY:

0.0000662

AC XY:

AN XY:

135892

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000924

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000821

AC:

AN:

1461838

Hom.:

Cov.:

AF XY:

0.00000825

AC XY:

AN XY:

727220

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000302

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152190

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74340

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00116

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000604

ExAC

AF:

0.0000577

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:6

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Lynch syndrome 1

Uncertain:2Benign:1

Ding PR Lab, Sun Yat-sen University Cancer Center

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Nov 25, 2019

Division of Medical Genetics, University of Washington

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

To our knowledge, this sequence variant has not been previously reported in the literature. This variant has an overall allele frequency of 0.00007072 in the Broad Institute gnomAD Browser; however, this variant has only been observed in individuals with East Asian ancestry at an allele frequency of 0.001002 (https://gnomad.broadinstitute.org/). In silico tools evaluating evolutionary conservation and impact on protein structure and function are mixed with regards to the effect of this variant and there are no functional studies to verify or refute these predictions. Therefore, we interpret this variant as a variant of uncertain significance. (No codes) -

Dec 06, 2024

Myriad Genetics, Inc.

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign. This variant is strongly associated with less severe personal and family histories of cancer, typical for individuals without pathogenic variants in this gene [PMID: 27363726]. -

Hereditary cancer-predisposing syndrome

Benign:2

Nov 01, 2021

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. -

Mar 24, 2021

Color Diagnostics, LLC DBA Color Health

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Uncertain:1

Mar 03, 2020

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 28009993) -

Malignant tumor of breast

Uncertain:1

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

The MSH2 p.Gln374Arg variant was not identified in the literature nor was it identified in the following databases: COGR, Cosmic, MutDB, UMD-LSDB, Insight Colon Cancer Gene Variant Database, Zhejiang Colon Cancer Database, Mismatch Repair Genes Variant Database, or Insight Hereditary Tumors Database. The variant was identified in dbSNP (ID: rs749660228) â€šÃ„ÃºWith Uncertain significance alleleâ€šÃ„Ã¹, ClinVar (classified uncertain significance by Ambry Genetics, Color Genomics Inc. and GeneDx), Clinvitae (2x), and in control databases in 21 of 277204 chromosomes at a frequency of 0.00008 (Genome Aggregation Database Feb 27, 2017). It was observed in the East Asian population in 21 of 18868 chromosomes (freq: 0.001); it was not observed in the African, â€šÃ„ÃºOtherâ€šÃ„Ã¹, Latino, European Non-Finnish, Ashkenazi Jewish, European Finnish, and South Asian populations. The p.Gln374 residue is conserved in mammals but not in more distantly related organisms however four out of five computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) do not suggest a high likelihood the variant Arg impacts the protein; this information is not predictive enough to rule out pathogenicity. The variant occurs outside of the splicing consensus sequence and 1 of 5 in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) predict a greater than 10% difference in splicing; this is not very predictive of pathogenicity. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time. This variant is classified as a variant of uncertain significance. -

not specified

Benign:1

Apr 23, 2020

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

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: MSH2 c.1121A>G (p.Gln374Arg) results in a conservative amino acid change located in the DNA mismatch repair protein MutS, core domain of 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 6.8e-05 in 251398 control chromosomes, predominantly at a frequency of 0.00092 within the East Asian subpopulation in the gnomAD database. The observed variant frequency within East Asian control individuals in the gnomAD database is approximately 1.62 fold of the estimated maximal expected allele frequency for a pathogenic variant in MSH2 causing Lynch Syndrome phenotype (0.00057), strongly suggesting that the variant is a benign polymorphism found primarily in populations of East Asian origin. c.1121A>G has been reported in the literature in a cohort of colorectal cancer patients without strong evidence for causality (Toh_2018). This report does not provide unequivocal conclusions about association of the variant with Lynch Syndrome. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Four clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. Three classified as VUS while one classified as likley benign. Based on the evidence outlined above, the variant was classified as likely benign. -

Breast and/or ovarian cancer

Benign:1

May 25, 2023

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary nonpolyposis colorectal neoplasms

Benign:1

Jan 31, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Benign

-0.0074

BayesDel_noAF

Pathogenic

0.16

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.72

D;.;.;.

Eigen

Uncertain

0.19

Eigen_PC

Uncertain

0.36

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.76

T;T;D;D

M_CAP

Uncertain

0.14

MetaRNN

Benign

0.22

T;T;T;T

MetaSVM

Uncertain

0.18

MutationAssessor

Benign

2.0

M;.;.;.

PrimateAI

Uncertain

0.66

PROVEAN

Uncertain

-2.6

D;D;.;D

REVEL

Uncertain

0.54

Sift

Benign

0.13

T;T;.;T

Sift4G

Benign

0.20

T;T;.;T

Polyphen

0.0030

B;.;.;B

Vest4

0.77

MutPred

0.41

Gain of phosphorylation at T375 (P = 0.1266);.;Gain of phosphorylation at T375 (P = 0.1266);Gain of phosphorylation at T375 (P = 0.1266);

MVP

0.97

MPC

0.0066

ClinPred

0.28

GERP RS

5.6

Varity_R

0.79

gMVP

0.48

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

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