Total submissions: 4
Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
---|---|---|---|---|---|---|---|---|
Laboratory for Molecular Medicine, |
RCV000035145 | SCV000058786 | likely pathogenic | Marfan syndrome | 2008-06-04 | criteria provided, single submitter | clinical testing | |
Gene |
RCV000427032 | SCV000516936 | pathogenic | not provided | 2022-05-19 | criteria provided, single submitter | clinical testing | Affects a cysteine residue within a calcium-binding EGF-like domain of the FBN1 gene, which may affect disulfide bonding and is predicted to alter the structure and function of the protein; cysteine substitutions in the calcium-binding EGF-like domains represent the majority of pathogenic missense changes associated with FBN1-related disorders (Collod-Beroud et al., 2003); Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 10464652, 19839986, 31447099, 12938084, 10486319, 16222657, 17657824, 31098894, 24199744, 29357934) |
Human Genome Sequencing Center Clinical Lab, |
RCV000035145 | SCV000839956 | pathogenic | Marfan syndrome | 2018-04-03 | criteria provided, single submitter | clinical testing | This c.2495G>A (p.Cys832Tyr) variant in the FBN1 gene has been reported in multiple unrelated individuals with Marfan syndrome (PMID: 10464652, 16222657, 17657824) and is extremely rare in the general population. Other reports have also observed different changes at the same amino acid in patients with Marfan syndrome (PMID: 19839986, 24793577). There is also strong functional data supporting pathogenesis (PMID: 10486319, 10464652). This c.2495G>A (p.Cys832Tyr) variant in the FBN1 gene is classified as pathogenic. |
Invitae | RCV001215995 | SCV001387766 | pathogenic | Marfan syndrome; Familial thoracic aortic aneurysm and aortic dissection | 2023-06-29 | criteria provided, single submitter | clinical testing | For these reasons, this variant has been classified as Pathogenic. This variant disrupts the p.Cys832 amino acid residue in FBN1. Other variant(s) that disrupt this residue have been observed in individuals with FBN1-related conditions (PMID: 19839986, 27906200), which suggests that this may be a clinically significant amino acid residue. This variant affects a cysteine residue in the EGF-like, TGFBP or hybrid motif domains of FBN1. Cysteine residues are believed to be involved in intramolecular disulfide bridges and have been shown to be important for FBN1 protein structure (PMID: 16905551, 19349279). In addition, missense substitutions affecting cysteine residues within these domains are significantly overrepresented among patients with Marfan syndrome (PMID: 16571647, 17701892). 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 expected to disrupt FBN1 protein function. ClinVar contains an entry for this variant (Variation ID: 42311). This missense change has been observed in individuals with Marfan syndrome (PMID: 10464652, 16222657, 17657824, 24199744, 29357934). It has also been observed to segregate with disease in related individuals. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces cysteine, which is neutral and slightly polar, with tyrosine, which is neutral and polar, at codon 832 of the FBN1 protein (p.Cys832Tyr). |