ClinVar Miner

Submissions for variant NM_198576.4(AGRN):c.4822G>A (p.Glu1608Lys)

gnomAD frequency: 0.00001  dbSNP: rs770435802
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV001205563 SCV001376825 uncertain significance Congenital myasthenic syndrome 8 2021-08-20 criteria provided, single submitter clinical testing This sequence change replaces glutamic acid with lysine at codon 1608 of the AGRN protein (p.Glu1608Lys). The glutamic acid residue is moderately conserved and there is a small physicochemical difference between glutamic acid and lysine. This variant is present in population databases (rs770435802, ExAC 0.006%). This variant has not been reported in the literature in individuals affected with AGRN-related conditions. 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 lysine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect 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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