rs1553353226
Positions:
Variant summary
Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM1PM2PM4PP3
The NM_000251.3(MSH2):c.1034_1045del(p.Trp345_Pro349delinsSer) variant causes a inframe deletion change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 32)
Consequence
MSH2
NM_000251.3 inframe_deletion
NM_000251.3 inframe_deletion
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 9.81
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 Likely_pathogenic. Variant got 7 ACMG points.
PM1
?
In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 6 benign, 16 uncertain in NM_000251.3
PM2
?
Very rare variant in population databases, with high coverage;
PM4
?
Nonframeshift variant in NON repetitive region in NM_000251.3.
PP3
?
No computational evidence supports a deleterious effect, but strongly conserved according to phyloP
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MSH2 | NM_000251.3 | c.1034_1045del | p.Trp345_Pro349delinsSer | inframe_deletion | 6/16 | ENST00000233146.7 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MSH2 | ENST00000233146.7 | c.1034_1045del | p.Trp345_Pro349delinsSer | inframe_deletion | 6/16 | 1 | NM_000251.3 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
We have no GnomAD4 exomes data on this position. Probably position not covered by the project.
GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Hereditary nonpolyposis colorectal neoplasms Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Sep 03, 2017 | In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. A different missense substitution within the stretch of codons deleted by this variant (p.Pro349Arg) has been determined to be pathogenic (Invitae). This suggests that the p.Pro349 residue is critical for MSH2 protein function and that other missense substitutions or deletions at this position may also be pathogenic. Experimental studies and prediction algorithms are not available for this variant, and the functional significance of the deleted amino acids is currently unknown. This variant has not been reported in the literature in individuals with MSH2-related disease. This variant is not present in population databases (ExAC no frequency). This variant, c.1034_1045delGGATTAAGCAGC, results in the deletion of 5 amino acids and the insertion of 1 amino acid in the MSH2 protein (p.Trp345_Pro349delinsSer), but otherwise preserves the integrity of the reading frame. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at