2-47429830-C-T

Variant names:

Variant summary

Our verdict is The variant received 18 classification points (ACMG Germline Pathogenicity v2019). PVS1PM2PP5_Very_Strong

The NM_000251.3(MSH2):c.1165C>T (p.Arg389*) 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 variant is present but has an allele frequency of zero in the gnomAD population database. In-silico predictor (BayesDel (addAF)) classifies this variant as likely damaging/oncogenic. 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: 0.0000041 ( 0 hom. )

Consequence

MSH2
NM_000251.3 stop_gained

Scores

Clinical Significance

Pathogenic reviewed by expert panel P:28O:1

Conservation

PhyloP100: 4.34

Publications

30 publications found

Variant links:

Genes affected

MSH2 (HGNC:7325): (mutS homolog 2) This locus is frequently mutated in hereditary nonpolyposis colon cancer (HNPCC). When cloned, it was discovered to be a human homolog of the E. coli mismatch repair gene mutS, consistent with the characteristic alterations in microsatellite sequences (RER+ phenotype) found in HNPCC. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2012]

MSH2 Gene-Disease associations (from GenCC):

Lynch syndrome
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, G2P, Orphanet
Lynch syndrome 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Ambry Genetics
mismatch repair cancer syndrome 1
Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
mismatch repair cancer syndrome 2
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
Muir-Torre syndrome
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
ovarian cancer
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
malignant pancreatic neoplasm
Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
prostate cancer
Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
rhabdomyosarcoma
Inheritance: AR Classification: MODERATE Submitted by: Genomics England PanelApp
breast cancer
Inheritance: AD Classification: NO_KNOWN Submitted by: Ambry Genetics
hereditary breast carcinoma
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

MSH2 links:

Genome browser will be placed here

new If you want to explore the variant's impact on the transcript NM_000251.3, check out the Mutation Effect Viewer. This is especially useful for frameshift variants or if you want to visualize the effect of exon loss / intron retention.

Classification according to ACMG Germline Pathogenicity v2019

Specifications for MSH2 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 18 points.

PVS1

Frameshift/stop-gained, NMD predicted, LoF disease mechanism — very strong (PVS1); Stop-gained (exon 7 of 16) at amino acid 389 of 934, predicted to trigger nonsense-mediated mRNA decay. Loss of function is a known disease mechanism for this gene.

PM2

Very rare in gnomAD for AD/XL gene (popmax AF < threshold/10) — PM2; GnomAD popmax AF = 0 — very rare for AD+AR gene (base 0.0001, raised to 0.0005 by highest known P/LP ClinVar AF 0.00268) — PM2 moderate.

PP5

ClinVar ≥3 stars pathogenic — very strong (PP5); ClinVar submissions overwhelmingly pathogenic (≥10 total, ≥80% P/LP, <10% B/LB) — strong (PP5, count-based); ClinVar germline classification: Pathogenic/Likely Pathogenic, 3 star(s). ClinVar submissions strongly and reliably favor pathogenicity (28/28 total P/LP).

Variant Effect in Transcripts

Automated classification analysis was done for transcript: NM_000251.3. You can select a different transcript below to see updated classification assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MSH2	NM_000251.3	MANE Select	c.1165C>T	p.Arg389*	stop_gained	Exon 7 of 16	NP_000242.1	P43246-1
MSH2	NM_001406658.1		c.-192C>T		5_prime_UTR_premature_start_codon_gain	Exon 7 of 16	NP_001393587.1
MSH2	NM_001406659.1		c.-192C>T		5_prime_UTR_premature_start_codon_gain	Exon 8 of 17	NP_001393588.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MSH2	ENST00000233146.7	TSL:1 MANE Select	c.1165C>T	p.Arg389*	stop_gained	Exon 7 of 16	ENSP00000233146.2	P43246-1
MSH2	ENST00000406134.5	TSL:1	c.1165C>T	p.Arg389*	stop_gained	Exon 7 of 16	ENSP00000384199.1	E9PHA6
MSH2	ENST00000918107.1		c.1216C>T	p.Arg406*	stop_gained	Exon 8 of 17	ENSP00000588166.1	A0ACI8SWY1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000410

AC:

AN:

1461840

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727232

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39688

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000450

AC:

AN:

1111982

Other (OTH)

AF:

0.0000166

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.508

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000101

Hom.:

Bravo

AF:

0.00000378

ClinVar

ClinVar submissions

Significance:Pathogenic

Revision:reviewed by expert panel

View on ClinVar

Pathogenic

VUS

Benign

Condition

Lynch syndrome 1 (9)

not provided (6)

Lynch syndrome (4)

Hereditary cancer-predisposing syndrome (3)

Carcinoma of colon (1)

Gastric cancer (1)

Hereditary nonpolyposis colorectal neoplasms (1)

Inherited MMR deficiency (Lynch syndrome) (1)

Mismatch repair cancer syndrome 1 (1)

Mismatch repair cancer syndrome 2 (1)

MSH2-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.63

BayesDel_noAF

Pathogenic

0.63

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

Eigen

Pathogenic

0.77

Eigen_PC

Uncertain

0.65

FATHMM_MKL

Pathogenic

0.97

PhyloP100

4.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Mutation Taster

=0/200

disease causing (ClinVar)

(source)

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

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

Classification according to ACMG Germline Pathogenicity v2019

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over