ClinVar Miner

Submissions for variant NM_000057.4(BLM):c.479_480del (p.Asp159_Phe160insTer)

dbSNP: rs1555418352
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Total submissions: 4
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Counsyl RCV000673428 SCV000798629 likely pathogenic Bloom syndrome 2018-03-21 criteria provided, single submitter clinical testing
Invitae RCV000673428 SCV001387857 pathogenic Bloom syndrome 2024-01-25 criteria provided, single submitter clinical testing This sequence change creates a premature translational stop signal (p.Phe160*) in the BLM gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in BLM are known to be pathogenic (PMID: 17407155). 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: 557304). For these reasons, this variant has been classified as Pathogenic.
Revvity Omics, Revvity RCV000673428 SCV002023436 likely pathogenic Bloom syndrome 2022-06-08 criteria provided, single submitter clinical testing
Ambry Genetics RCV003303099 SCV003999940 pathogenic Hereditary cancer-predisposing syndrome 2023-06-02 criteria provided, single submitter clinical testing The c.479_480delTT pathogenic mutation, located in coding exon 2 of the BLM gene, results from a deletion of two nucleotides at nucleotide positions 479 to 480, causing a translational frameshift with a predicted alternate stop codon (p.F160*). This variant is considered to be rare based on population cohorts in the Genome Aggregation Database (gnomAD). This alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. As such, this alteration is interpreted as a disease-causing mutation.

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