Description
This sequence change replaces proline, which is neutral and non-polar, with arginine, which is basic and polar, at codon 940 of the ABCA4 protein (p.Pro940Arg). This variant is present in population databases (rs144995371, gnomAD 0.06%). This missense change has been observed in individual(s) with macular degeneration and/or Stargardt disease (PMID: 10634626, 18024811, 30060493; Invitae). ClinVar contains an entry for this variant (Variation ID: 286835). 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 ABCA4 protein function. Experimental studies have shown that this missense change affects ABCA4 function (PMID: 11919200, 23144455). 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.
# | Sample | Method | Observation |
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Origin | Affected | Number tested | Tissue | Purpose | Method | Individuals | Allele frequency | Families | Co-occurrences |
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1 | germline | unknown | not provided | not provided | not provided | | not provided | not provided | not provided | not provided |