NM_000179.3:c.3772C>G

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_StrongBS1_Supporting

The NM_000179.3(MSH6):c.3772C>G(p.Gln1258Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000155 in 1,614,088 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

MSH6
NM_000179.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:8B:1

Conservation

PhyloP100: 3.07

Variant links:

Genes affected

MSH6 (HGNC:7329): (mutS homolog 6) This gene encodes a member of the DNA mismatch repair MutS family. In E. coli, the MutS protein helps in the recognition of mismatched nucleotides prior to their repair. A highly conserved region of approximately 150 aa, called the Walker-A adenine nucleotide binding motif, exists in MutS homologs. The encoded protein heterodimerizes with MSH2 to form a mismatch recognition complex that functions as a bidirectional molecular switch that exchanges ADP and ATP as DNA mismatches are bound and dissociated. Mutations in this gene may be associated with hereditary nonpolyposis colon cancer, colorectal cancer, and endometrial cancer. Transcripts variants encoding different isoforms have been described. [provided by RefSeq, Jul 2013]

MSH6 links:

FBXO11 (HGNC:13590): (F-box protein 11) This gene encodes a member of the F-box protein family which is characterized by an approximately 40 amino acid motif, the F-box. The F-box proteins constitute one of the four subunits of ubiquitin protein ligase complex called SCFs (SKP1-cullin-F-box), which function in phosphorylation-dependent ubiquitination. The F-box proteins are divided into 3 classes: Fbws containing WD-40 domains, Fbls containing leucine-rich repeats, and Fbxs containing either different protein-protein interaction modules or no recognizable motifs. The protein encoded by this gene belongs to the Fbxs class. It can function as an arginine methyltransferase that symmetrically dimethylates arginine residues, and it acts as an adaptor protein to mediate the neddylation of p53, which leads to the suppression of p53 function. This gene is known to be down-regulated in melanocytes from patients with vitiligo, a skin disorder that results in depigmentation. Polymorphisms in this gene are associated with chronic otitis media with effusion and recurrent otitis media (COME/ROM), a hearing loss disorder, and the knockout of the homologous mouse gene results in the deaf mouse mutant Jeff (Jf), a single gene model of otitis media. Alternatively spliced transcript variants encoding distinct isoforms have been identified for this gene. [provided by RefSeq, Jun 2010]

FBXO11 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0608041).

BS1

Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.0000328 (5/152256) while in subpopulation EAS AF= 0.000963 (5/5190). AF 95% confidence interval is 0.000379. There are 0 homozygotes in gnomad4. There are 2 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MSH6	NM_000179.3 link	c.3772C>G	p.Gln1258Glu	missense_variant	Exon 8 of 10	ENST00000234420.11	NP_000170.1	P52701-1Q3SWU9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MSH6	ENST00000234420.11 link	c.3772C>G	p.Gln1258Glu	missense_variant	Exon 8 of 10	1	NM_000179.3	ENSP00000234420.5		P52701-1

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152138

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:

0.000961

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:

0.0000398

AC:

AN:

251214

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135772

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000489

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000137

AC:

AN:

1461832

Hom.:

Cov.:

AF XY:

0.0000165

AC XY:

AN XY:

727210

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000479

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000328

AC:

AN:

152256

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74450

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000963

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000434

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000576

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:8Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:2

Mar 04, 2025

Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jul 26, 2019

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

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: MSH6 c.3772C>G (p.Gln1258Glu) results in a conservative amino acid change located in the C-terminal domain of the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 4e-05 in 251214 control chromosomes, predominantly at a frequency of 0.00049 within the East Asian subpopulation in the gnomAD database. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.3772C>G has been reported in the literature in individuals affected with Lynch Syndrome (Rossi_2017, Soares_2018, Schneider_2018) and familial breast cancer (Wang_2019). These data do not allow any conclusion about variant significance. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Five clinical diagnostic laboratories have submitted clinical-significance assessments for this variant (after 2014) and classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. -

not provided

Uncertain:2

Sep 22, 2023

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; Observed in individuals with breast cancer or suspected Lynch syndrome (Ross 2017, Schneider 2018, Kiyozumi 2019, Wang 2019, Shin 2020); This variant is associated with the following publications: (PMID: 28932927, 28874130, 29575718, 30982232, 32019277, 31386297, 17531815, 21120944) -

Oct 30, 2024

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The MSH6 c.3772C (p.Gln1258Glu) variant has been reported in the published literature in individuals with breast (PMIDs: 30982232 (2019), 32019277 (2020)), colorectal (PMIDs: 28874130 (2017), 28932927 (2018), 29575718 (2018)), pancreatic (PMID: 32980694 (2020)), and bile duct cancer (PMID: 31666926 (2019)). The frequency of this variant in the general population, 0.00049 (9/18392 chromosomes in East Asian subpopulation (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is higher than would generally be expected for pathogenic variants in this gene. 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 benign. Based on the available information, we are unable to determine the clinical significance of this variant. -

Hereditary cancer-predisposing syndrome

Uncertain:2

Jan 23, 2023

Color Diagnostics, LLC DBA Color Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This missense variant replaces glutamine with glutamic acid at codon 1258 of the MSH6 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been observed in individuals affected with Lynch syndrome (PMID: 28874130, 28932927, 29575718, 31386297), pancreatic cancer (PMID: 32980694), and breast or ovarian cancer (PMID: 30982232, 32019277). One individual affected with Lynch syndrome was reported to have an unspecified pathogenic co-variant and lacked phenotypes expected for biallelic constitutional mismatch repair deficiency (PMID: 29575718), while another showed microsatellite stability and presence of mismatch repair proteins by immunohistochemistry (PMID: 31386297). This variant has been identified in 10/251214 chromosomes in the general population by the Genome Aggregation Database (gnomAD) and has been reported in healthy individuals (PMID: 32980694). 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. -

May 21, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Q1258E variant (also known as c.3772C>G), located in coding exon 8 of the MSH6 gene, results from a C to G substitution at nucleotide position 3772. The glutamine at codon 1258 is replaced by glutamic acid, an amino acid with highly similar properties. This alteration was detected in a Korean individual whose colorectal tumor was microsatellite stable (MSS) and demonstrated normal mismatch repair protein expression on immunohistochemistry (Kiyozumi Y et al. Cancer Med, 2019 Sep;8:5534-5543); however, this alteration was also detected in one family from Brazil with suspected Lynch syndrome (Rossi BM et al. BMC Cancer, 2017 Sep;17:623). This alteration was reported in a Brazilian individual with no features of CMRD who also had MLH1 p.Lys618Glu (Schneider NB et al. Cancer Med, 2018 05;7:2078-2088). This alteration was identified in a cohort of patients diagnosed with biliary tract carcinoma undergoing multigene panel testing for hereditary cancer risk (Terashima T et al. Oncotarget, 2019 Oct;10:5949-5957), as well as in 1/496 Korean patients with clinical features of hereditary breast and ovarian cancer syndrome (HBOC) (Shin HC et al. Cancer Res Treat, 2020 Jul;52:697-713). This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Lynch syndrome

Uncertain:1

Aug 28, 2023

All of Us Research Program, National Institutes of Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Endometrial carcinoma

Uncertain:1

Jan 27, 2024

Baylor Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary nonpolyposis colorectal neoplasms

Benign:1

Nov 04, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.069

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.27

CADD

Benign

DANN

Benign

0.81

DEOGEN2

Benign

0.30

.;.;T;.

Eigen

Benign

0.0032

Eigen_PC

Benign

0.15

FATHMM_MKL

Uncertain

0.87

LIST_S2

Uncertain

0.90

.;D;D;D

M_CAP

Benign

0.0023

MetaRNN

Benign

0.061

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.87

.;.;N;.

PrimateAI

Benign

0.41

PROVEAN

Benign

-0.13

.;N;N;N

REVEL

Benign

0.18

Sift

Benign

0.91

.;T;T;T

Sift4G

Benign

1.0

T;T;T;T

Polyphen

0.0010

.;.;B;.

Vest4

0.45

MVP

0.89

ClinPred

0.026

GERP RS

4.6

Varity_R

0.17

gMVP

0.52

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