ClinVar Miner

Submissions for variant NM_000138.5(FBN1):c.6659G>C (p.Arg2220Pro)

dbSNP: rs780651466
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV002039211 SCV002111590 uncertain significance Marfan syndrome; Familial thoracic aortic aneurysm and aortic dissection 2021-02-15 criteria provided, single submitter clinical testing 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. This sequence change replaces arginine with proline at codon 2220 of the FBN1 protein (p.Arg2220Pro). The arginine residue is highly conserved and there is a moderate physicochemical difference between arginine and proline. This variant is not present in population databases (ExAC no frequency). This variant has been observed in individual(s) with FBN1-related conditions (Invitae). This variant disrupts the p.Arg2220 amino acid residue in FBN1. Other variant(s) that disrupt this residue have been observed in individuals with FBN1-related conditions (PMID: 30056620), which suggests that this may be a clinically significant amino acid residue. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

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