chr2-47408449-C-G

Position:

chr2-47408449-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 1P and 0B. PP3

The NM_001406656.1(MSH2):c.-736C>G variant causes a 5 prime UTR premature start codon gain change. The variant allele was found at a frequency of 0.0000205 in 1,611,528 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000021 ( 0 hom. )

Consequence

MSH2
NM_001406656.1 5_prime_UTR_premature_start_codon_gain

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:7B:1

Conservation

PhyloP100: 5.11

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:

MSH2 (HGNC:):

MSH2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.791

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MSH2	NM_000251.3 linkuse as main transcript	c.260C>G	p.Ser87Cys	missense_variant	2/16	ENST00000233146.7	NP_000242.1	P43246-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MSH2	ENST00000233146.7 linkuse as main transcript	c.260C>G	p.Ser87Cys	missense_variant	2/16	1	NM_000251.3	ENSP00000233146.2		P43246-1

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

151214

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:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000399

AC:

AN:

250910

Hom.:

AF XY:

0.00000737

AC XY:

AN XY:

135604

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:

0.00000881

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000212

AC:

AN:

1460314

Hom.:

Cov.:

AF XY:

0.0000262

AC XY:

AN XY:

726470

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.0000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000132

AC:

AN:

151214

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

73748

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000113

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:7Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Lynch syndrome 1

Uncertain:2Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Mar 25, 2024	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Counsyl	Aug 30, 2017	- -
Likely benign, criteria provided, single submitter	clinical testing	Myriad Genetics, Inc.	Nov 14, 2023	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

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Apr 06, 2023	This missense variant replaces serine with cysteine at codon 87 of the MSH2 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). 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). This variant has been reported in individuals affected with breast, pancreatic or primary peritoneal cancers (PMID: 29659587, 29945567, 32547938). This variant has been identified in 2/282148 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Jul 26, 2023	The p.S87C variant (also known as c.260C>G), located in coding exon 2 of the MSH2 gene, results from a C to G substitution at nucleotide position 260. The serine at codon 87 is replaced by cysteine, an amino acid with dissimilar properties. This alteration was identified in a cohort of pancreatic cancer patients undergoing multigene panel testing (Young EL et al. BMC Cancer, 2018 Jun;18:697) and in a woman with primary peritoneal cancer who tested negative for the BRCA1 mutation previously identified in her family (Mitchell R et al. PLoS One, 2018 Apr;13:e0195497). This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Lynch syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

All of Us Research Program, National Institutes of Health

May 04, 2023

This missense variant replaces serine with cysteine at codon 87 of the MSH2 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). 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). This variant has been reported in individuals affected with breast, pancreatic or primary peritoneal cancers (PMID: 29659587, 29945567, 32547938). This variant has been identified in 2/282148 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. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Mar 06, 2018

This variant is denoted MSH2 c.260C>G at the cDNA level, p.Ser87Cys (S87C) at the protein level, and results in the change of a Serine to a Cysteine (TCT>TGT). This variant has not, to our knowledge, been published in the literature as pathogenic or benign. MSH2 Ser87Cys was not observed at a significant allele frequency in large population cohorts (Lek 2016). MSH2 Ser87Cys is located in the mismatch binding domain (Lutzen 2008, Kansikas 2011). In-silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect. Based on currently available information, it is unclear whether MSH2 Ser87Cys is a pathogenic or benign variant. We consider it to be a variant of uncertain significance. -

Hereditary nonpolyposis colorectal neoplasms

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 25, 2024

This sequence change replaces serine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 87 of the MSH2 protein (p.Ser87Cys). This variant is present in population databases (rs587781447, gnomAD 0.002%). This missense change has been observed in individual(s) with breast cancer (PMID: 32547938). ClinVar contains an entry for this variant (Variation ID: 141032). Advanced modeling performed at Invitae incorporating data from internal and/or published experimental studies (PMID: 33357406) indicates that this missense variant is not expected to disrupt MSH2 function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Pathogenic

0.26

BayesDel_noAF

Uncertain

0.13

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Pathogenic

0.87

D;D;.;.;.

Eigen

Uncertain

0.60

Eigen_PC

Uncertain

0.52

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.96

D;D;D;D;D

M_CAP

Uncertain

0.14

MetaRNN

Pathogenic

0.79

D;D;D;D;D

MetaSVM

Pathogenic

0.81

MutationAssessor

Uncertain

2.9

M;.;.;.;.

PrimateAI

Uncertain

0.73

PROVEAN

Uncertain

-3.0

D;D;D;.;D

REVEL

Pathogenic

0.66

Sift

Uncertain

0.0030

D;D;D;.;D

Sift4G

Uncertain

0.0080

D;D;D;.;D

Polyphen

1.0

D;.;.;.;D

Vest4

0.67

MVP

0.84

MPC

0.0078

ClinPred

0.72

GERP RS

5.3

Varity_R

0.86

gMVP

0.46

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