2-47789757-G-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.261-1170G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.29 in 151,938 control chromosomes in the GnomAD database, including 6,954 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★★).

• Frequency: Genomes: 𝑓 0.29 (6954 hom., cov: 32)
• Consequence: MSH6 NM_000179.3 intron
• Clinical Significance: Benign reviewed by expert panel B:1
• Conservation: PhyloP100: -0.926

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]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.03).
• BP6: Variant 2-47789757-G-T is Benign according to our data. Variant chr2-47789757-G-T is described in ClinVar as [Benign]. Clinvar id is 89300.Status of the report is reviewed_by_expert_panel, 3 stars. Variant chr2-47789757-G-T is described in Lovd as [Benign].
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.359 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MSH6	NM_000179.3	c.261-1170G>T		intron_variant		ENST00000234420.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MSH6	ENST00000234420.11	c.261-1170G>T		intron_variant		1	NM_000179.3	P4

Frequencies

GnomAD3 genomes AF: 0.290 AC: 43982 AN: 151822 Hom.: 6946 Cov.: 32

Gnomad AFR AF: 0.242

Gnomad AMI AF: 0.256

Gnomad AMR AF: 0.226

Gnomad ASJ AF: 0.267

Gnomad EAS AF: 0.00231

Gnomad SAS AF: 0.127

Gnomad FIN AF: 0.322

Gnomad MID AF: 0.239

Gnomad NFE AF: 0.363

Gnomad OTH AF: 0.307

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.290 AC: 44007 AN: 151938 Hom.: 6954 Cov.: 32 AF XY: 0.282 AC XY: 20917 AN XY: 74224

Gnomad4 AFR AF: 0.243

Gnomad4 AMR AF: 0.225

Gnomad4 ASJ AF: 0.267

Gnomad4 EAS AF: 0.00231

Gnomad4 SAS AF: 0.128

Gnomad4 FIN AF: 0.322

Gnomad4 NFE AF: 0.363

Gnomad4 OTH AF: 0.302

Alfa AF: 0.177 Hom.: 360

Bravo AF: 0.282

Asia WGS AF: 0.0870 AC: 306 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: reviewed by expert panel

Submissions by phenotype

Lynch syndrome Benign:1

Benign, reviewed by expert panel

research

International Society for Gastrointestinal Hereditary Tumours (InSiGHT)

Sep 05, 2013

MAF >1% -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
Cadd	Benign	0.55
Dann	Benign	0.40

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: rs3136272; hg19: chr2-48016896;