ClinVar Miner

Submissions for variant NM_183050.4(BCKDHB):c.33_34del (p.Leu12fs)

gnomAD frequency: 0.00003  dbSNP: rs398124572
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Total submissions: 5
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Eurofins Ntd Llc (ga) RCV000790710 SCV000224711 pathogenic not provided 2013-11-25 criteria provided, single submitter clinical testing
Illumina Laboratory Services, Illumina RCV000173587 SCV000916166 uncertain significance Maple syrup urine disease 2018-11-20 criteria provided, single submitter clinical testing The BCKDHB c.33_34delAC (p.Leu12GlnfsTer8) variant results in a frameshift and is predicted to result in premature termination of the protein. A literature search was performed for the gene, cDNA change, and amino acid change. No publications were found based on this search. The p.Leu12GlnfsTer8 variant is reported at a frequency of 0.000019 in the European (non-Finnish) population of the Genome Aggregation Database though this is based on one allele in a region of good sequence coverage so the variant is presumed to be rare. Based on the variant frequency, disease prevalence, disease penetrance, and inheritance mode, this variant could not be ruled out of causing disease. Due to the potential impact of frameshift variants and the lack of clarifying evidence, this variant is classified as a variant of unknown significance but suspicious for pathogenicity for maple syrup urine disease. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population.
Invitae RCV000173587 SCV001228478 pathogenic Maple syrup urine disease 2023-11-22 criteria provided, single submitter clinical testing This sequence change creates a premature translational stop signal (p.Leu12Glnfs*8) in the BCKDHB gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in BCKDHB are known to be pathogenic (PMID: 16786533, 22593002). This variant is present in population databases (rs398124572, gnomAD 0.002%). This variant has not been reported in the literature in individuals affected with BCKDHB-related conditions. ClinVar contains an entry for this variant (Variation ID: 96578). For these reasons, this variant has been classified as Pathogenic.
Genome-Nilou Lab RCV000173587 SCV002033018 likely pathogenic Maple syrup urine disease 2021-11-07 criteria provided, single submitter clinical testing
Baylor Genetics RCV000173587 SCV004215986 pathogenic Maple syrup urine disease 2023-04-29 criteria provided, single submitter clinical testing

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