ClinVar Miner

Submissions for variant NM_000057.4(BLM):c.64A>G (p.Asn22Asp)

dbSNP: rs1370338581
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV000819153 SCV000959797 uncertain significance Bloom syndrome 2022-10-19 criteria provided, single submitter clinical testing This sequence change replaces asparagine, which is neutral and polar, with aspartic acid, which is acidic and polar, at codon 22 of the BLM protein (p.Asn22Asp). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with BLM-related conditions. ClinVar contains an entry for this variant (Variation ID: 661679). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. 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.
Ambry Genetics RCV001025340 SCV001187513 uncertain significance Hereditary cancer-predisposing syndrome 2023-06-17 criteria provided, single submitter clinical testing The p.N22D variant (also known as c.64A>G), located in coding exon 1 of the BLM gene, results from an A to G substitution at nucleotide position 64. The asparagine at codon 22 is replaced by aspartic acid, an amino acid with highly similar properties. This amino acid position is poorly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.
Natera, Inc. RCV000819153 SCV002089882 uncertain significance Bloom syndrome 2020-08-20 no assertion criteria provided clinical testing

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