2-47799858-C-T

Variant names:

• chr2-47799858-C-T
• rs63749886
• NM_000179.3:c.1875C>T

Variant summary

Our verdict is Benign. The variant received -17 ACMG points: 0P and 17B. BP4_Strong BP6_Very_Strong BP7 BS1

The NM_000179.3(MSH6):​c.1875C>T​(p.Ser625Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000911 in 1,614,038 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 Likely benign (★★★). Synonymous variant affecting the same amino acid position (i.e. S625S) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000092 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000091 (0 hom.)
• Consequence: MSH6 NM_000179.3 synonymous
• Clinical Significance: Likely benign reviewed by expert panel U:1 B:16
• Conservation: PhyloP100: -0.106
• Publications: 6 publications found

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]

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 Gene-Disease associations (from GenCC):

• intellectual developmental disorder with dysmorphic facies and behavioral abnormalities

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P

ACMG classification

Our verdict: Benign. The variant received -17 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.47).
• BP6: Variant 2-47799858-C-T is Benign according to our data. Variant chr2-47799858-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 89231.Status of the report is reviewed_by_expert_panel, 3 stars.
• BP7: Synonymous conserved (PhyloP=-0.106 with no splicing effect.
• BS1: Variant frequency is greater than expected in population mid. GnomAdExome4 allele frequency = 0.000091 (133/1461856) while in subpopulation MID AF = 0.00104 (6/5768). AF 95% confidence interval is 0.000453. There are 0 homozygotes in GnomAdExome4. There are 63 alleles in the male GnomAdExome4 subpopulation. Median coverage is 34. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MSH6	NM_000179.3	c.1875C>T	p.Ser625Ser	synonymous_variant	Exon 4 of 10	ENST00000234420.11	NP_000170.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MSH6	ENST00000234420.11	c.1875C>T	p.Ser625Ser	synonymous_variant	Exon 4 of 10	1	NM_000179.3	ENSP00000234420.5

Frequencies

GnomAD3 genomes AF: 0.0000920 AC: 14 AN: 152182 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000262

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.000283

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000735

Gnomad OTH AF: 0.000478

GnomAD2 exomes AF: 0.000140 AC: 35 AN: 250376 AF XY: 0.000111

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000174

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.000601

Gnomad NFE exome AF: 0.000115

Gnomad OTH exome AF: 0.000492

GnomAD4 exome AF: 0.0000910 AC: 133 AN: 1461856 Hom.: 0 Cov.: 34 AF XY: 0.0000866 AC XY: 63 AN XY: 727234

African (AFR) AF: 0.0000299 AC: 1 AN: 33480

American (AMR) AF: 0.000313 AC: 14 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.000843 AC: 45 AN: 53396

Middle Eastern (MID) AF: 0.00104 AC: 6 AN: 5768

European-Non Finnish (NFE) AF: 0.0000450 AC: 50 AN: 1112004

Other (OTH) AF: 0.000281 AC: 17 AN: 60396

GnomAD4 genome AF: 0.0000920 AC: 14 AN: 152182 Hom.: 0 Cov.: 32 AF XY: 0.0000807 AC XY: 6 AN XY: 74344

African (AFR) AF: 0.0000241 AC: 1 AN: 41434

American (AMR) AF: 0.000262 AC: 4 AN: 15276

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5196

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.000283 AC: 3 AN: 10616

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000735 AC: 5 AN: 68042

Other (OTH) AF: 0.000478 AC: 1 AN: 2092

Alfa AF: 0.000135 Hom.: 0

Bravo AF: 0.000155

EpiCase AF: 0.000109

EpiControl AF: 0.000119

ClinVar

Significance: Likely benign

Submissions summary: Uncertain:1 Benign:16

Revision: reviewed by expert panel

Submissions by phenotype

Hereditary cancer-predisposing syndrome Benign:4

May 31, 2021

Sema4, Sema4

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: curation

- -

Jan 15, 2025

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

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The synonymous variant NM_000179.3(MSH6):c.1875C>T (p.Ser625=) has been reported to ClinVar as Likely benign with a status of (3 stars) reviewed by expert panel (Variation ID 89231 as of 2025-01-02). The p.Ser625= variant is not predicted to disrupt an existing splice site. The p.Ser625= variant results in a substitution of a base that is not predicted conserved by GERP++ and PhyloP. For these reasons, this variant has been classified as Likely Benign -

Oct 29, 2015

Color Diagnostics, LLC DBA Color Health

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 22, 2015

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. -

Lynch syndrome 5 Benign:3

Feb 23, 2018

Counsyl

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

May 28, 2019

Mendelics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 29, 2023

Myriad Genetics, Inc.

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered benign. This variant is a silent/synonymous amino acid change and it is not expected to impact splicing. -

not provided Benign:3

Oct 27, 2020

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 01, 2022

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 03, 2015

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Lynch syndrome Uncertain:1 Benign:1

Oct 18, 2018

International Society for Gastrointestinal Hereditary Tumours (InSiGHT)

Significance: Likely benign

Review Status: reviewed by expert panel

Collection Method: curation

Multifactorial likelihood analysis posterior probability 0.001-0.049 (0.029) -

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified Benign: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

- -

Nov 06, 2020

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

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Carcinoma of colon Benign:1

-

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

The p.Ser625Ser variant was identified by Vahteristo, 2005 in a breast or colorectal carcinoma patient with family history of cancer. The variant was also identified in dbSNP (ID: rs63749886) “With uncertain significance”, “Mismatch Repair Genes Variant Database”, “Zhejiang Colon Cancer Database”, the ClinVar database 1x with “uncertain significance”, InSiGHT Colon Cancer Gene Variant Database 1X as an “unknown variant” and UMD 1 X as a “neutral” variant,. This variant was also identified in the the Exome Aggregation Consortium (ExAC) database (released Oct 20th, 2014) in 19 of 120346 (European (Finnish and non-Finnish) and Latino) alleles (frequency: 0.00016), although this low number of observations and low frequency is not substantive enough to determine the prevalence of the variant in the general population and its relationship to disease. The p.Ser625Ser variant is not expected to have clinical significance because it does not result in a change of amino acid and is not located in a known consensus splice site. In addition, in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) do not predict a difference in splicing. In addition, this variant was found in our laboratory to co-occur in with a known pathogenic variant c.3957dupA, increasing the likelihood that this variant does not have clinical significance. In summary, based on the above information, this variant meets our laboratories criteria to be classified as benign. -

Breast and/or ovarian cancer Benign:1

Mar 03, 2023

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

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary nonpolyposis colorectal neoplasms Benign:1

Feb 04, 2025

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
BayesDel_noAF	Benign	-0.47
CADD	Benign	7.8
DANN	Benign	0.78
PhyloP100		-0.11
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8
Mutation Taster		=97/3	polymorphism

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

Other links and lift over

dbSNP: rs63749886; hg19: chr2-48026997;