ClinVar Miner

Submissions for variant NM_000038.6(APC):c.2991T>G (p.Tyr997Ter) (rs864622629)

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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV000546964 SCV000647288 pathogenic Familial adenomatous polyposis 1 2017-07-03 criteria provided, single submitter clinical testing This sequence change results in a premature translational stop signal in the APC gene (p.Tyr997*). While this is not anticipated to result in nonsense mediated decay, it is expected to delete the last 1847 amino acids of the APC protein. This variant is not present in population databases (ExAC no frequency). This variant has been reported in a family and unrelated individuals affected with familial adenomatous polyposis (PMID: 11247896, 20685668). A different variant (c.2990dupA) giving rise to the same protein effect observed here (p.Tyr997*) has also been reported in an individual affected with familial adenomatous polyposis (PMID: 10083733). This variant removes the basic domain, the EB1 binding site, and the HDLG binding site, which mediate interactions with the cytoskeleton (PMID: 15311282, 17293347). Other truncations downstream of this variant, p.Tyr2645Lysfs*14 and p.Asp1942Glufs*27, have been determined to be pathogenic (PMID: 1316610, 8381579, 9824584, 22135120, 15108286, 11001924). While functional studies have not been performed to directly test the effect of this variant on APC protein function, these observations suggest that deletion of the C-terminal portion of the APC protein is causative of disease. For these reasons, this variant has been classified as Pathogenic.

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