ClinVar Miner

Submissions for variant NM_000138.5(FBN1):c.762del (p.Leu256fs)

dbSNP: rs1064793559
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Total submissions: 4
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000479276 SCV000566443 pathogenic not provided 2015-05-11 criteria provided, single submitter clinical testing Although the c.762delC variant in the FBN1 gene has not been reported to our knowledge, this deletion causes a shift in reading frame starting at codon Leucine 256, changing it to a Serine, and creating apremature stop codon at position 74 of the new reading frame, denoted p.Leu256SerfsX74. This deletion is expected to result in either an abnormal, truncated protein product or loss of protein from this allelethrough nonsense-mediated mRNA decay. Other frameshift variants in the FBN1 gene have beenreported in HGMD in association with Marfan syndrome (Stenson P et al., 2014). In summary, c.762delC in the FBN1 gene is interpreted as a pathogenic variant.
Labcorp Genetics (formerly Invitae), Labcorp RCV001389362 SCV001590688 pathogenic Marfan syndrome; Familial thoracic aortic aneurysm and aortic dissection 2024-06-17 criteria provided, single submitter clinical testing This sequence change creates a premature translational stop signal (p.Leu256Serfs*74) in the FBN1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in FBN1 are known to be pathogenic (PMID: 17657824, 19293843). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with Marfan syndrome (PMID: 33059708). ClinVar contains an entry for this variant (Variation ID: 418977). For these reasons, this variant has been classified as Pathogenic.
GenomeConnect, ClinGen RCV000509554 SCV000606887 not provided Marfan syndrome no assertion provided phenotyping only GenomeConnect assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. GenomeConnect staff make no attempt to reinterpret the clinical significance of the variant.
Center for Medical Genetics Ghent, University of Ghent RCV000509554 SCV000787346 likely pathogenic Marfan syndrome 2017-11-07 no assertion criteria provided clinical testing

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