ClinVar Miner

Submissions for variant NM_000277.3(PAH):c.223G>A (p.Asp75Asn)

gnomAD frequency: 0.00001  dbSNP: rs767453024
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV000805522 SCV000945480 likely pathogenic Phenylketonuria 2023-12-12 criteria provided, single submitter clinical testing This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 75 of the PAH protein (p.Asp75Asn). This variant is present in population databases (rs767453024, gnomAD 0.004%). This missense change has been observed in individual(s) with PAH-related disease (Invitae). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 650381). 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 PAH protein function with a negative predictive value of 80%. This variant disrupts the p.Asp75 amino acid residue in PAH. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 28982351, 29499199). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic.

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