chr2-47806770-A-C

Variant names:

• chr2-47806770-A-C
• rs755141440
• NM_000179.3:c.4002-9A>C

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 2P and 12B. PM2 BP4_Strong BP6_Very_Strong

The NM_000179.3(MSH6):​c.4002-9A>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000136 in 1,473,568 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 (★★).

• Frequency:
  • Genomes: 𝑓 0.0000076 (0 hom., cov: 30)
  • Exomes 𝑓: 7.4e-7 (0 hom.)
• Consequence: MSH6 NM_000179.3 intron
• Scores: Splicing: ADA: 0.00001722
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -0.655
• Publications: 0 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 -10 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BP6: Variant 2-47806770-A-C is Benign according to our data. Variant chr2-47806770-A-C is described in ClinVar as Likely_benign. ClinVar VariationId is 1155462.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000179.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MSH6	NM_000179.3	MANE Select	c.4002-9A>C		intron	N/A	NP_000170.1
	MSH6	NM_001406795.1		c.4098-9A>C		intron	N/A	NP_001393724.1
	MSH6	NM_001406813.1		c.4008-9A>C		intron	N/A	NP_001393742.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MSH6	ENST00000234420.11	TSL:1 MANE Select	c.4002-9A>C		intron	N/A	ENSP00000234420.5
	MSH6	ENST00000445503.5	TSL:1	n.*3349-9A>C		intron	N/A	ENSP00000405294.1
	FBXO11	ENST00000465204.5	TSL:2	n.3140T>G		non_coding_transcript_exon	Exon 5 of 5

Frequencies

GnomAD3 genomes AF: 0.00000763 AC: 1 AN: 131112 Hom.: 0 Cov.: 30

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000164

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 7.45e-7 AC: 1 AN: 1342456 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 669878

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 28154

American (AMR) AF: 0.00 AC: 0 AN: 35988

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24588

East Asian (EAS) AF: 0.00 AC: 0 AN: 38022

South Asian (SAS) AF: 0.00 AC: 0 AN: 77490

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 46242

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5332

European-Non Finnish (NFE) AF: 9.70e-7 AC: 1 AN: 1030680

Other (OTH) AF: 0.00 AC: 0 AN: 55960

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome AF: 0.00000763 AC: 1 AN: 131112 Hom.: 0 Cov.: 30 AF XY: 0.0000157 AC XY: 1 AN XY: 63658

African (AFR) AF: 0.00 AC: 0 AN: 33266

American (AMR) AF: 0.00 AC: 0 AN: 13408

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3204

East Asian (EAS) AF: 0.00 AC: 0 AN: 4814

South Asian (SAS) AF: 0.00 AC: 0 AN: 4318

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 8212

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000164 AC: 1 AN: 60954

Other (OTH) AF: 0.00 AC: 0 AN: 1802

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	1	Hereditary nonpolyposis colorectal neoplasms (1)
-	-	1	Lynch syndrome 5 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	4.7
DANN	Benign	0.60
PhyloP100		-0.66
Mutation Taster		=100/0	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000017
dbscSNV1_RF	Benign	0.024
SpliceAI score (max)		0.070		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: rs755141440; hg19: chr2-48033909;