2-47803699-A-T

Position:

• chr2-47803699-A-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_000179.3(MSH6):​c.3438+14A>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.388 in 1,612,944 control chromosomes in the GnomAD database, including 125,475 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★★).

• Frequency:
  • Genomes: 𝑓 0.33 (9378 hom., cov: 32)
  • Exomes 𝑓: 0.39 (116097 hom.)
• Consequence: MSH6 NM_000179.3 intron
• Clinical Significance: Benign reviewed by expert panel B:23
• Conservation: PhyloP100: -0.0370

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]

MSH6 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BP6: Variant 2-47803699-A-T is Benign according to our data. Variant chr2-47803699-A-T is described in ClinVar as [Benign]. Clinvar id is 42471.Status of the report is reviewed_by_expert_panel, 3 stars. Variant chr2-47803699-A-T is described in Lovd as [Benign]. Variant chr2-47803699-A-T is described in Lovd as [Likely_benign].
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.601 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MSH6	NM_000179.3	c.3438+14A>T		intron_variant		ENST00000234420.11	NP_000170.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MSH6	ENST00000234420.11	c.3438+14A>T		intron_variant		1	NM_000179.3	ENSP00000234420.5

Frequencies

GnomAD3 genomes AF: 0.334 AC: 50795 AN: 151926 Hom.: 9379 Cov.: 32

Gnomad AFR AF: 0.175

Gnomad AMI AF: 0.383

Gnomad AMR AF: 0.435

Gnomad ASJ AF: 0.359

Gnomad EAS AF: 0.618

Gnomad SAS AF: 0.494

Gnomad FIN AF: 0.330

Gnomad MID AF: 0.345

Gnomad NFE AF: 0.374

Gnomad OTH AF: 0.352

GnomAD3 exomes AF: 0.412 AC: 103194 AN: 250622 Hom.: 22601 AF XY: 0.413 AC XY: 56058 AN XY: 135688

Gnomad AFR exome AF: 0.168

Gnomad AMR exome AF: 0.508

Gnomad ASJ exome AF: 0.377

Gnomad EAS exome AF: 0.624

Gnomad SAS exome AF: 0.476

Gnomad FIN exome AF: 0.342

Gnomad NFE exome AF: 0.382

Gnomad OTH exome AF: 0.399

GnomAD4 exome AF: 0.394 AC: 575178 AN: 1460902 Hom.: 116097 Cov.: 37 AF XY: 0.396 AC XY: 287563 AN XY: 726788

Gnomad4 AFR exome AF: 0.158

Gnomad4 AMR exome AF: 0.497

Gnomad4 ASJ exome AF: 0.366

Gnomad4 EAS exome AF: 0.568

Gnomad4 SAS exome AF: 0.472

Gnomad4 FIN exome AF: 0.339

Gnomad4 NFE exome AF: 0.388

Gnomad4 OTH exome AF: 0.383

GnomAD4 genome AF: 0.334 AC: 50784 AN: 152042 Hom.: 9378 Cov.: 32 AF XY: 0.339 AC XY: 25189 AN XY: 74318

Gnomad4 AFR AF: 0.175

Gnomad4 AMR AF: 0.435

Gnomad4 ASJ AF: 0.359

Gnomad4 EAS AF: 0.619

Gnomad4 SAS AF: 0.492

Gnomad4 FIN AF: 0.330

Gnomad4 NFE AF: 0.374

Gnomad4 OTH AF: 0.348

Alfa AF: 0.338 Hom.: 1154

Bravo AF: 0.337

ClinVar

Significance: Benign

Submissions summary: Benign:23

Revision: reviewed by expert panel

Submissions by phenotype

not specified Benign:10

Benign, criteria provided, single submitter	clinical testing	GeneDx	Nov 19, 2014	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Benign, no assertion criteria provided	clinical testing	Department of Pathology and Laboratory Medicine, Sinai Health System	-	- -
Benign, criteria provided, single submitter	clinical testing	Unidad de Genómica Garrahan, Hospital de Pediatría Garrahan	Jan 24, 2024	This variant is classified as Benign based on local population frequency. This variant was detected in 77% of patients studied by a panel of primary immunodeficiencies. Number of patients: 73. Only high quality variants are reported. -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics Laboratory, Department of Pathology, Netherlands Cancer Institute	-	- -
Benign, no assertion criteria provided	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	-	- -
Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Jul 22, 2011	This variant is classified as benign based on its high frequency in the general population (rs2020911, MAF >3%). -
Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	May 27, 2015	- -
Benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -

Lynch syndrome 5 Benign:5

Benign, criteria provided, single submitter	clinical testing	KCCC/NGS Laboratory, Kuwait Cancer Control Center	Jul 07, 2023	- -
Benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Benign, criteria provided, single submitter	clinical testing	Counsyl	Dec 07, 2015	- -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
Benign, criteria provided, single submitter	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	Sep 21, 2015	- -

not provided Benign:2

Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Nov 30, 2023	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Hereditary cancer-predisposing syndrome Benign:2

Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Mar 31, 2015	- -
Benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Aug 26, 2014	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. -

Endometrial carcinoma;C1833477:Lynch syndrome 5;C5436807:Mismatch repair cancer syndrome 3 Benign:1

Benign, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Aug 11, 2021

- -

Breast and/or ovarian cancer Benign:1

Benign, criteria provided, single submitter

clinical testing

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

Apr 22, 2021

- -

Lynch syndrome Benign:1

Benign, reviewed by expert panel

research

International Society for Gastrointestinal Hereditary Tumours (InSiGHT)

Sep 05, 2013

MAF >1% -

Hereditary nonpolyposis colorectal neoplasms Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Feb 01, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	4.0
DANN	Benign	0.63

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

Other links and lift over

dbSNP: rs2020911; hg19: chr2-48030838; COSMIC: COSV52273834; COSMIC: COSV52273834;