Submissions for variant NM_000057.4(BLM):c.1544dup (p.Asn515fs) (rs367543043)

Minimum review status:		Collection method:
Minimum conflict level:
		ClinVar version:

Total submissions: 2

Download table as spreadsheet

Submitter	RCV	SCV	Clinical significance	Condition	Last evaluated	Review status	Method	Comment
Invitae	RCV000034890	SCV000623244	pathogenic	Bloom syndrome	2018-06-05	criteria provided, single submitter	clinical testing	This sequence change creates a premature translational stop signal (p.Asn515Lysfs*2) in the BLM gene. It is expected to result in an absent or disrupted protein product. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the ExAC database. This variant has been reported in the literature in individuals affected with Bloom syndrome (PMID: 7585968, 17407155). ClinVar contains an entry for this variant (Variation ID: 42064). Loss-of-function variants in BLM are known to be pathogenic (PMID: 17407155). For these reasons, this variant has been classified as Pathogenic.
Integrated Genetics/Laboratory Corporation of America	RCV000034890	SCV000918658	pathogenic	Bloom syndrome	2018-11-12	criteria provided, single submitter	clinical testing	Variant summary: BLM c.1544dupA (p.Asn515LysfsX2) results in a premature termination codon, predicted to cause a truncation of the encoded protein or absence of the protein due to nonsense mediated decay, which are commonly known mechanisms for disease. Truncations downstream of this position have been classified as pathogenic by our laboratory (eg. c.1642C>T, p.Gln548X; c.2207_2212delinsTAGATTC, p.Tyr736fsX5). The variant was absent in 245606 control chromosomes (gnomAD). c.1544dupA has been reported in the literature in multiple individuals affected with Bloom Syndrome and indicated to be a Japanese founder mutation (Ellis_1995, German_2007). These data indicate that the variant is very likely to be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. A ClinVar submission from a clinical diagnostic laboratory (evaluation after 2014) cites the variant as pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic.

The information on this website is not intended for direct diagnostic use or medical decision-making without review by a genetics professional. Individuals should not change their health behavior solely on the basis of information contained on this website. Neither the University of Utah nor the National Institutes of Health independently verfies the submitted information. If you have questions about the information contained on this website, please see a health care professional.