NM_000179.3:c.642C>G

Variant names:

• chr2-47798625-C-G
• rs1800937
• NM_000179.3:c.642C>G
• MSH6 p.Tyr214*

GermlineCancer (beta)

Variant summary

Our verdict is Pathogenic.

+11 Pathogenic

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

The variant received 11 classification points (ACGS-UK Somatic Oncogenicity v2025). O1_ModerateO2_Very_StrongO3_Supporting

The NM_000179.3(MSH6):c.642C>G (p.Tyr214*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant is predicted to lead to nonsense-mediated mRNA decay (NMD). The gene MSH6 is a tumor suppressor gene (CancerMine: 1 TSG, 8 oncogene, 1 driver citations). The gene MSH6 is a known oncogene (CancerMine: 1 TSG, 8 oncogene, 1 driver citations). The gene MSH6 is a cancer driver gene (CancerMine: 1 TSG, 8 oncogene, 1 driver citations). The variant allele was found at a cumulative frequency of 0.00000754 (AC=11) in the gnomAD database across 1,458,516 control chromosomes (no homozygotes observed). The grpmax filtering allele frequency (95% CI) is 0.00000531. In-silico predictor (AlphaMissense) classifies this variant as likely benign. Splicing prediction tools (SpliceAI) predict no significant impact on normal splicing. Variant has been reported in ClinVar as Pathogenic/Likely Pathogenic (★★★). This exact variant is curated in the UniProt human variants database as Uncertain Significance; it is also listed as a COSMIC curated somatic variant.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000075 (0 hom.)
• Consequence: MSH6 NM_000179.3 stop_gained
• Clinical Significance: Pathogenic reviewed by expert panel P:10
• Conservation: PhyloP100: -2.00
• Publications: 4 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]

MSH6 Gene-Disease associations (from GenCC):

• Lynch syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, G2P, Orphanet
• Lynch syndrome 5

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine
• mismatch repair cancer syndrome 1

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• mismatch repair cancer syndrome 3

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae)
• ovarian cancer

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• malignant pancreatic neoplasm

  Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
• Muir-Torre syndrome

  Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
• rhabdomyosarcoma

  Inheritance: AR Classification: MODERATE Submitted by: Genomics England PanelApp
• breast cancer

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• prostate cancer

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• hereditary breast carcinoma

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

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: G2P, Labcorp Genetics (formerly Invitae), PanelApp Australia, Ambry Genetics

Classification according to ACGS-UK Somatic Oncogenicity v2025

Specifications for MSH6 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Classification was made for transcript:

Our verdict: Pathogenic. The variant received 11 points.

Apply	Criterion Code & Title / Strength	Strength	Rationale / Clinical Context
	O1Established oncogenic variant		TSG gene: ClinVar germline P/LP ★★+ — Moderate (O1); O1 contributing sources (2.0 pts): ClinVar germline P/LP in TSG (★★★)
	O2Null variant in tumour suppressor gene		Frameshift/stop-gained, NMD predicted, LoF oncogenic mechanism — O2 very strong (+8); Use caution in the presence of multiple transcripts; Gene confirmed as TSG in CancerMine (TSG: 1 citations, oncogene: 8 citations, driver: 1 citations).; Frameshift/stop-gained. NMD predicted: true. LoF mechanism: true. Downstream pathogenic count: 2092.
	O3Absent or very rare in population		Very rare in gnomAD (popmax AF <0.01%) — O3 supporting; GnomAD effective popmax AF = 0.000005 — very rare (O3 supporting [+1])

Variant Effect in Transcripts

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

RefSeq Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	MSH6 NM_000179.3	MANE Select	c.642C>G p.Tyr214*	stop_gained	Exon 4 of 10	Prot: NP_000170.1 UniProt:
	MSH6 NM_001406795.1		c.738C>G p.Tyr246*	stop_gained	Exon 5 of 11	Prot: NP_001393724.1
	MSH6 NM_001406813.1		c.648C>G p.Tyr216*	stop_gained	Exon 4 of 10	Prot: NP_001393742.1

MSH6 NM_000179.3

MANE Select

HGVSc / HGVSpc.642C>Gp.Tyr214*

Exon rankExon 4 of 10

stop_gained

Prot: NP_000170.1UniProt: P52701-1

MSH6 NM_001406795.1

HGVSc / HGVSpc.738C>Gp.Tyr246*

Exon rankExon 5 of 11

stop_gained

Prot: NP_001393724.1

MSH6 NM_001406813.1

HGVSc / HGVSpc.648C>Gp.Tyr216*

Exon rankExon 4 of 10

stop_gained

Prot: NP_001393742.1

Ensembl Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	MSH6 ENST00000234420.11	TSL:1MANE Select	c.642C>G p.Tyr214*	stop_gained	Exon 4 of 10	Prot: ENSP00000234420.5 UniProt:
	MSH6 ENST00000445503.5	TSL:1	n.472C>G	non_coding_transcript_exon	Exon 3 of 9	Prot: ENSP00000405294.1 UniProt:
	MSH6 ENST00000936511.1		c.642C>G p.Tyr214*	stop_gained	Exon 4 of 10	Prot: ENSP00000606570.1 UniProt:

MSH6 ENST00000234420.11

TSL:1MANE Select

HGVSc / HGVSpc.642C>Gp.Tyr214*

Exon rankExon 4 of 10

stop_gained

Prot: ENSP00000234420.5UniProt: P52701-1

MSH6 ENST00000445503.5

TSL:1

HGVSc / HGVSpn.472C>G

Exon rankExon 3 of 9

non_coding_transcript_exon

Prot: ENSP00000405294.1UniProt: F8WAX8

MSH6 ENST00000936511.1

HGVSc / HGVSpc.642C>Gp.Tyr214*

Exon rankExon 4 of 10

stop_gained

Prot: ENSP00000606570.1UniProt: A0ACI8TYH3

Frequencies

Allele frequencies (AF), counts (AC/AN), homozygotes and coverage

Common (AF > 0.05 / Hom > 5)

Rare (AF ≤ 0.0001 / Hom ≤ 1)

Source / population	AF	AC	Hom	AN	Coverage
Global population databases 3 sources Large-scale international reference populations
GnomAD3 genomes	AF:	AC:	Hom:	AN:	Cov:32
GnomAD4 exome	AF: 0.00000754	AC:11	Hom:0	AN:1458516	Cov:34
GnomAD4 genome	AF:	AC:	Hom:	AN:	Cov:32
Local & regional cohorts 1 source Population-specific and national genomic databases
UK10K	AF: 0.000132	AC:1	Hom:	AN:7562	Cov:

Showing 4 sources

Case/control cohorts

Cohort	Cases			Controls
	AF	AC	AN	AF	AC	AN
SCHEMA(Schizophrenia)	0.00000937	1	106692	0.00	0	194418

Showing 1 cohortAllele count / allele number. AF is computed from the counts for ASC (not provided by the source).

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: reviewed by expert panel

Pathogenic	VUS	Benign	Condition
3	-	-	not provided (3)
2	-	-	Lynch syndrome (2)
1	-	-	Endometrial carcinoma;C1833477:Lynch syndrome 5;C5436807:Mismatch repair cancer syndrome 3 (1)
1	-	-	Hereditary cancer-predisposing syndrome (1)
1	-	-	Hereditary nonpolyposis colorectal neoplasms (1)
1	-	-	Inherited MMR deficiency (Lynch syndrome) (1)
1	-	-	Lynch syndrome 5 (1)

Computational Scores

Algorithm	Calibrated pred.	Score	Prediction
AlphaGenome AVI	Pathogenic	26
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.015	T
BayesDel_noAF	Benign	-0.26
CADD	Benign	20
DANN	Benign	0.90
Eigen	Benign	-0.61
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.20	N
GPN-Star LLR	N/A	-3.8
GPN-Star score	N/A	3.8
Mutation Taster	N/A	0/200	disease causing (ClinVar)
PhyloP100	Benign	-2.0

Showing 13 of 13 scores

Splicing Scores

Algorithm	Calibrated pred.	Score	Prediction
Pangolin (max)	Benign	0.13
Pangolin loss	Benign	0.13	Position offset: -14
SpliceAI score (max)	Benign	0.11	Details are displayed if max score is > 0.2

Showing 3 of 3 scores

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

MaveDB functional evidence

MaveDB is a public repository of laboratory assays that test the effect of thousands of variants at once — treat this as supporting research data and interpret it with great caution; it is not a clinical classification.

No MaveDB functional evidence found for this variant.

Other links and lift over

dbSNP: rs1800937;

hg19: chr2-48025764;

COSMIC: COSV104579296;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline

Submit to ClinVar