rs587779193
Variant summary
Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PVS1_ModeratePM2PP3_StrongPP5_Very_Strong
The NM_000251.3(MSH2):c.942+1G>A variant causes a splice donor change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (★★).
Frequency
Genomes: not found (cov: 0)
Consequence
MSH2
NM_000251.3 splice_donor
NM_000251.3 splice_donor
Scores
5
1
1
Splicing: ADA: 1.000
2
Clinical Significance
Conservation
PhyloP100: 9.59
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]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 16 ACMG points.
PVS1
?
Splicing variant, NOT destroyed by nmd, known LOF gene, truncates exone, which is 0.05311943 fraction of the gene. No cryptic splice site detected. Exon removal is inframe change.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
PP5
?
Variant 2-47414419-G-A is Pathogenic according to our data. Variant chr2-47414419-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 823244.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr2-47414419-G-A is described in Lovd as [Likely_pathogenic]. Variant chr2-47414419-G-A is described in Lovd as [Pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MSH2 | NM_000251.3 | c.942+1G>A | splice_donor_variant | ENST00000233146.7 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MSH2 | ENST00000233146.7 | c.942+1G>A | splice_donor_variant | 1 | NM_000251.3 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 0
GnomAD3 genomes
?
Cov.:
0
GnomAD4 exome Cov.: 25
GnomAD4 exome
Cov.:
25
GnomAD4 genome ? Cov.: 0
GnomAD4 genome
?
Cov.:
0
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:3
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Lynch syndrome 1 Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Myriad Genetics, Inc. | Jul 28, 2023 | This variant is considered pathogenic. This variant occurs within a consensus splice junction and is predicted to result in abnormal mRNA splicing of either an out-of-frame exon or an in-frame exon necessary for protein stability and/or normal function. Functional studies indicate this variant impacts protein function [PMID: 8062247]. - |
Hereditary nonpolyposis colorectal neoplasms Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Mar 08, 2023 | ClinVar contains an entry for this variant (Variation ID: 823244). For these reasons, this variant has been classified as Pathogenic. This variant disrupts a region of the MSH2 protein in which other variant(s) (p.Leu310) have been determined to be pathogenic (Invitae). This suggests that this is a clinically significant region of the protein, and that variants that disrupt it are likely to be disease-causing. Studies have shown that disruption of this splice site results in skipping of exon 5, but is expected to preserve the integrity of the reading-frame (Invitae). Disruption of this splice site has been observed in individual(s) with clinical features of Lynch syndrome (PMID: 18566915, 21520333). This variant is not present in population databases (gnomAD no frequency). This sequence change affects a donor splice site in intron 5 of the MSH2 gene. RNA analysis indicates that disruption of this splice site induces altered splicing and likely results in a shortened protein product. - |
Hereditary cancer-predisposing syndrome Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Ambry Genetics | Apr 29, 2019 | The c.942+1G>A intronic pathogenic mutation results from a G to A substitution one nucleotide after coding exon 5 of the MSH2 gene. This nucleotide position is highly conserved in available vertebrate species. Using two different splice site prediction tools, this alteration is predicted by BDGP to abolish the native splice donor site, but is predicted to weaken (but not abolish) the efficiency of the native splice donor site by ESEfinder; however, direct evidence is unavailable. Alterations that disrupt the canonical splice site are expected to cause aberrant splicing, resulting in an abnormal protein or a transcript that is subject to nonsense-mediated mRNA decay. As such, this alteration is classified as a disease-causing mutation. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
Cadd
Pathogenic
Dann
Uncertain
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
MutationTaster
Benign
D;D;D
GERP RS
Splicing
Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Pathogenic
dbscSNV1_RF
Pathogenic
SpliceAI score (max)
Details are displayed if max score is > 0.2
DS_DL_spliceai
Position offset: -1
Find out detailed SpliceAI scores and Pangolin per-transcript scores at