Description
The CHEK2 p.Glu351Asp variant was not identified in the literature nor was it identified in the MutDB or Zhejiang University databases. The variant was identified in dbSNP (ID: rs587782268) as "With Uncertain significance allele", ClinVar (classified as uncertain significance by Ambry Genetics, Invitae, GeneDx, and Color Genomics), Cosmic (2x in large intestine or endometrium tissue), and in LOVD 3.0 (1x likely benign). The variant was identified in control databases in 22 of 246082 chromosomes at a frequency of 0.0001 (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: European in 4 of 111582 chromosomes (freq: 0.00004), and South Asian in 18 of 30780 chromosomes (freq: 0.0006), but not in the African, Other, Latino, Ashkenazi Jewish, East Asian, and Finnish populations. The p.Glu351 residue is conserved in mammals and computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) provide inconsistent predictions regarding the impact to the protein; this information is not very predictive of pathogenicity. The variant occurs outside of the splicing consensus sequence and 1 of 5 in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) predict a difference in splicing. In summary, based on the above information, the clinical significance of this variant cannot be determined with certainty at this time. This variant is classified as a variant of uncertain significance.
| # | Sample | Method | Observation |
|---|
| Origin | Affected | Number tested | Tissue | Purpose | Method | Individuals | Allele frequency | Families | Co-occurrences |
|---|
| 1 | unknown | yes | not provided | not provided | not provided | | 1 | not provided | not provided | not provided |
