Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM1BP6
The NM_000251.3(MSH2):c.1366A>G(p.Thr456Ala) variant causes a missense change. The variant allele was found at a frequency of 0.0000137 in 1,610,232 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. T456I) has been classified as Uncertain significance.
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]
Verdict is Uncertain_significance. Variant got 1 ACMG points.
PM1
In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 8 benign, 17 uncertain in NM_000251.3
BP6
Variant 2-47445637-A-G is Benign according to our data. Variant chr2-47445637-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 560787.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=2}.