NM_000179.3:c.2951A>C

Variant names:

• chr2-47800934-A-C
• rs587779927
• NM_000179.3:c.2951A>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 4P and 2B. PM1 PM2 BP4_Moderate

The NM_000179.3(MSH6):​c.2951A>C​(p.Asn984Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000127 in 1,577,240 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N984H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 7.0e-7 (0 hom.)
• Consequence: MSH6 NM_000179.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5 B:1
• Conservation: PhyloP100: 3.23
• Publications: 1 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: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 6 benign, 54 uncertain in NM_000179.3
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.11062482).

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MSH6	NM_000179.3	MANE Select	c.2951A>C	p.Asn984Thr	missense	Exon 4 of 10	NP_000170.1	P52701-1
	MSH6	NM_001406795.1		c.3047A>C	p.Asn1016Thr	missense	Exon 5 of 11	NP_001393724.1
	MSH6	NM_001406813.1		c.2957A>C	p.Asn986Thr	missense	Exon 4 of 10	NP_001393742.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MSH6	ENST00000234420.11	TSL:1 MANE Select	c.2951A>C	p.Asn984Thr	missense	Exon 4 of 10	ENSP00000234420.5	P52701-1
	MSH6	ENST00000445503.5	TSL:1	n.*2298A>C		non_coding_transcript_exon	Exon 3 of 9	ENSP00000405294.1	F8WAX8
	MSH6	ENST00000445503.5	TSL:1	n.*2298A>C		3_prime_UTR	Exon 3 of 9	ENSP00000405294.1	F8WAX8

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152170 Hom.: 0 Cov.: 32

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 7.02e-7 AC: 1 AN: 1425070 Hom.: 0 Cov.: 34 AF XY: 0.00 AC XY: 0 AN XY: 705460

African (AFR) AF: 0.00 AC: 0 AN: 31776

American (AMR) AF: 0.00 AC: 0 AN: 37970

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24032

East Asian (EAS) AF: 0.00 AC: 0 AN: 39332

South Asian (SAS) AF: 0.00 AC: 0 AN: 80338

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52264

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5560

European-Non Finnish (NFE) AF: 9.13e-7 AC: 1 AN: 1095162

Other (OTH) AF: 0.00 AC: 0 AN: 58636

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152170 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74326

African (AFR) AF: 0.00 AC: 0 AN: 41446

American (AMR) AF: 0.00 AC: 0 AN: 15270

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5200

South Asian (SAS) AF: 0.00 AC: 0 AN: 4822

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10616

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

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68032

Other (OTH) AF: 0.00 AC: 0 AN: 2086

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	2	-	Hereditary cancer-predisposing syndrome (2)
-	2	-	Lynch syndrome 5 (2)
-	-	1	Hereditary nonpolyposis colorectal neoplasms (1)
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.070
BayesDel_addAF	Benign	-0.026	T
BayesDel_noAF	Benign	-0.27
CADD	Benign	19
DANN	Benign	0.94
DEOGEN2	Benign	0.32	T
Eigen	Benign	-0.50
Eigen_PC	Benign	-0.30
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.79	T
M_CAP	Benign	0.057	D
MetaRNN	Benign	0.11	T
MetaSVM	Benign	-0.70	T
MutationAssessor	Benign	-0.46	N
PhyloP100		3.2
PrimateAI	Benign	0.43	T
PROVEAN	Benign	-0.22	N
REVEL	Benign	0.27
Sift	Benign	0.29	T
Sift4G	Benign	0.26	T
Polyphen		0.0010	B
Vest4		0.20
MutPred		0.37		Gain of phosphorylation at T986 (P = 0.1396)
MVP		0.84
ClinPred		0.72	D
GERP RS		2.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.14
gMVP		0.32
Mutation Taster		=55/45	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: rs587779927; hg19: chr2-48028073;