rs1800938

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS1

The NM_000179.3(MSH6):c.660A>C(p.Glu220Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00008 in 1,612,634 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E220G) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000077 ( 0 hom. )

Consequence

MSH6
NM_000179.3 missense

Scores

Clinical Significance

Likely benign reviewed by expert panel U:4B:14

Conservation

PhyloP100: 0.464

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 Benign. Variant got -16 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.061014086).

BP6

Variant 2-47798643-A-C is Benign according to our data. Variant chr2-47798643-A-C is described in ClinVar as [Likely_benign]. Clinvar id is 89551.Status of the report is reviewed_by_expert_panel, 3 stars. Variant chr2-47798643-A-C is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population mid. gnomad4_exome allele frequency = 0.0000774 (113/1460292) while in subpopulation MID AF= 0.00122 (7/5746). AF 95% confidence interval is 0.000571. There are 0 homozygotes in gnomad4_exome. There are 61 alleles in male gnomad4_exome subpopulation. Median coverage is 34. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MSH6	NM_000179.3 link	c.660A>C	p.Glu220Asp	missense_variant	Exon 4 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.660A>C	p.Glu220Asp	missense_variant	Exon 4 of 10	1	NM_000179.3	ENSP00000234420.5		P52701-1

Frequencies

GnomAD3 genomes

AF:

0.000105

AC:

AN:

152224

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000162

Gnomad OTH

AF:

0.000955

GnomAD3 exomes

AF:

0.000120

AC:

AN:

249020

Hom.:

AF XY:

0.000156

AC XY:

AN XY:

134702

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000579

Gnomad ASJ exome

AF:

0.0000995

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000196

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000177

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.0000774

AC:

113

AN:

1460292

Hom.:

Cov.:

AF XY:

0.0000840

AC XY:

AN XY:

726458

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000112

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000692

Gnomad4 OTH exome

AF:

0.000232

GnomAD4 genome

AF:

0.000105

AC:

AN:

152342

Hom.:

Cov.:

AF XY:

0.0000940

AC XY:

AN XY:

74496

show subpopulations

Gnomad4 AFR

AF:

0.0000240

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000414

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000162

Gnomad4 OTH

AF:

0.000945

Alfa

AF:

0.000203

Hom.:

Bravo

AF:

0.000117

ExAC

AF:

0.000148

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000178

ClinVar

Significance: Likely benign

Submissions summary: Uncertain:4Benign:14

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:3

Nov 01, 2016

Eurofins Ntd Llc (ga)

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 03, 2021

Institute for Clinical Genetics, University Hospital TU Dresden, University Hospital TU Dresden

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 16, 2020

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is associated with the following publications: (PMID: 22495361, 16203774, 23621914, 15340264, 21153778, 10537275) -

May 01, 2021

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary cancer-predisposing syndrome

Uncertain:1Benign:3

May 07, 2024

Institute for Biomarker Research, Medical Diagnostic Laboratories, L.L.C.

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 29, 2021

Sema4, Sema4

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: curation

- -

Jul 25, 2016

Color Diagnostics, LLC DBA Color Health

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 21, 2018

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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:1Benign:2

Mar 04, 2025

Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mayo Clinic Laboratories, Mayo Clinic

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: research

- -

Jan 30, 2023

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: MSH6 c.660A>C (p.Glu220Asp) results in a conservative amino acid change in 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 0.00014 in 249420 control chromosomes, predominantly at a frequency of 0.0002 within the South Asian subpopulation in the gnomAD database. This frequency is about 1.4-fold higher than the estimated maximal expected allele frequency of a pathogenic MSH6 variant. c.660A>C has been reported in the literature in individuals affected with cancer without evidence of cosegregation (Okkels_2012, Woods_2005, Li_2020, Muskens_2020). These reports do not provide unequivocal conclusions about association of the variant with Hereditary Nonpolyposis Colorectal Cancer. At least one publication reports experimental evidence evaluating an impact on MMR activity (Drost_2020). These results showed no damaging effect of this variant. Ten (other) submitters, including an expert panel, have provided clinical-significance assessments for this variant to ClinVar after 2014, and all classified it as benign/likely benign. Based on the evidence outlined above, the variant was classified as likely benign. -

Lynch syndrome 5

Benign:2

May 28, 2019

Mendelics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jul 07, 2023

KCCC/NGS Laboratory, Kuwait Cancer Control Center

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

MSH6-related disorder

Uncertain:1

Aug 03, 2023

PreventionGenetics, part of Exact Sciences

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The MSH6 c.660A>C variant is predicted to result in the amino acid substitution p.Glu220Asp. This variant has been reported in both affected individuals and controls in the literature, and was interpreted as a polymorphism (Kolodner et al. 1999. PubMed ID: 10537275; Kim et al. 2004. PubMed ID: 15340264; Woods et al. 2005. PubMed ID: d) or an “unclassified” variant (Okkels et al. 2012. PubMed ID: 22495361; Terui et al. 2013. PubMed ID: 23621914). This variant is reported in 0.020% of alleles in individuals of South Asian descent in gnomAD (http://gnomad.broadinstitute.org/variant/2-48025782-A-C) and is interpreted as likely benign in ClinVar (https://www.ncbi.nlm.nih.gov/clinvar/variation/89551/). Although we suspect that this variant may be benign, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Endometrial carcinoma;C1833477:Lynch syndrome 5;C5436807:Mismatch repair cancer syndrome 3

Benign:1

Mar 23, 2022

Fulgent Genetics, Fulgent Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Breast and/or ovarian cancer

Benign:1

Jun 29, 2023

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

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Lynch syndrome

Benign:1

Sep 05, 2013

International Society for Gastrointestinal Hereditary Tumours (InSiGHT)

Significance: Likely benign

Review Status: reviewed by expert panel

Collection Method: research

MAF 1% in a specific population -

Hereditary nonpolyposis colorectal neoplasms

Benign:1

Jan 15, 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

0.087

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.36

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.25

.;T;T;T

Eigen

Benign

-0.45

Eigen_PC

Benign

-0.34

FATHMM_MKL

Benign

0.67

LIST_S2

Benign

0.77

T;T;T;T

M_CAP

Benign

0.055

MetaRNN

Benign

0.061

T;T;T;T

MetaSVM

Benign

-0.65

MutationAssessor

Benign

1.6

.;L;.;.

PrimateAI

Benign

0.39

PROVEAN

Benign

-0.19

N;N;.;N

REVEL

Benign

0.19

Sift

Benign

0.20

T;T;.;T

Sift4G

Benign

0.54

T;T;T;T

Polyphen

0.0020

.;B;.;.

Vest4

0.21

MutPred

0.064

.;Gain of sheet (P = 0.1208);.;.;

MVP

0.83

ClinPred

0.031

GERP RS

3.4

RBP_binding_hub_radar

1.1

RBP_regulation_power_radar

3.9

Varity_R

0.034

gMVP

0.073

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