ClinVar Miner

Submissions for variant NM_000744.7(CHRNA4):c.1652C>T (p.Thr551Ile)

gnomAD frequency: 0.00001  dbSNP: rs79438238
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV001228365 SCV001400761 uncertain significance Autosomal dominant nocturnal frontal lobe epilepsy 2023-10-13 criteria provided, single submitter clinical testing This sequence change replaces threonine, which is neutral and polar, with isoleucine, which is neutral and non-polar, at codon 551 of the CHRNA4 protein (p.Thr551Ile). This variant is present in population databases (rs79438238, gnomAD 0.005%). This missense change has been observed in individual(s) with clinical features of CHRNA4-related conditions (Invitae). ClinVar contains an entry for this variant (Variation ID: 955681). 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 CHRNA4 protein function. 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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