ClinVar Miner

Submissions for variant NM_000368.4(TSC1):c.1997A>G (p.Lys666Arg) (rs1419720341)

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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV000546131 SCV000641541 uncertain significance Tuberous sclerosis 1 2018-07-08 criteria provided, single submitter clinical testing This sequence change replaces lysine with arginine at codon 666 of the TSC1 protein (p.Lys666Arg). The lysine residue is weakly conserved and there is a small physicochemical difference between lysine and arginine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with TSC1-related disease. ClinVar contains an entry for this variant (Variation ID: 466056). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The arginine amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. 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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