ClinVar Miner

Submissions for variant NM_144997.7(FLCN):c.623T>G (p.Phe208Cys)

gnomAD frequency: 0.00001  dbSNP: rs1441105848
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV001219820 SCV001391778 uncertain significance Birt-Hogg-Dube syndrome 2022-09-25 criteria provided, single submitter clinical testing This sequence change replaces phenylalanine, which is neutral and non-polar, with cysteine, which is neutral and slightly polar, at codon 208 of the FLCN protein (p.Phe208Cys). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with FLCN-related conditions. ClinVar contains an entry for this variant (Variation ID: 948543). 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 not expected to disrupt FLCN protein function. RNA analysis performed to evaluate the impact of this missense change on mRNA splicing indicates it does not significantly alter splicing (Invitae). 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.
St. Jude Molecular Pathology, St. Jude Children's Research Hospital RCV001219820 SCV004171464 uncertain significance Birt-Hogg-Dube syndrome 2023-10-16 criteria provided, single submitter clinical testing The FLCN c.623T>G (p.Phe208Cys) missense change is absent in gnomAD v2.1.1 (https://gnomad.broadinstitute.org). The in silico tool REVEL predicts a deleterious effect on protein function, but to our knowledge this prediction has not been confirmed by functional studies. To our knowledge, this variant has not been reported in individuals with Birt-Hogg-Dubé syndrome. In summary, the evidence currently available is insufficient to determine the clinical significance of this variant. It has therefore been classified as of uncertain significance.

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