ClinVar Miner

Submissions for variant NM_000321.3(RB1):c.1499G>T (p.Arg500Ile)

dbSNP: rs1593456939
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV000804792 SCV000944720 uncertain significance Retinoblastoma 2018-08-15 criteria provided, single submitter clinical testing Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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. Experimental studies have shown that this missense change impairs RB1 mRNA splicing and results in exon 17 skipping (PMID: 18449911). This variant has been observed in individuals affected with retinoblastoma (PMID: 18449911, Invitae). This variant is not present in population databases (ExAC no frequency). This sequence change replaces arginine with isoleucine at codon 500 of the RB1 protein (p.Arg500Ile). The arginine residue is highly conserved and there is a moderate physicochemical difference between arginine and isoleucine.

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