ClinVar Miner

Submissions for variant NM_000057.4(BLM):c.3700G>A (p.Gly1234Ser)

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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Ambry Genetics RCV002348929 SCV002621901 uncertain significance Hereditary cancer-predisposing syndrome 2022-04-05 criteria provided, single submitter clinical testing The p.G1234S variant (also known as c.3700G>A), located in coding exon 18 of the BLM gene, results from a G to A substitution at nucleotide position 3700. The glycine at codon 1234 is replaced by serine, an amino acid with similar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.
Labcorp Genetics (formerly Invitae), Labcorp RCV003614110 SCV004539493 uncertain significance Bloom syndrome 2023-06-09 criteria provided, single submitter clinical testing Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt BLM protein function. ClinVar contains an entry for this variant (Variation ID: 1734102). This variant has not been reported in the literature in individuals affected with BLM-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glycine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 1234 of the BLM protein (p.Gly1234Ser). 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.

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