ClinVar Miner

Submissions for variant NM_000321.3(RB1):c.2570G>T (p.Arg857Leu)

dbSNP: rs144668210
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Ambry Genetics RCV001015985 SCV001176886 uncertain significance Hereditary cancer-predisposing syndrome 2018-08-17 criteria provided, single submitter clinical testing The p.R857L variant (also known as c.2570G>T), located in coding exon 25 of the RB1 gene, results from a G to T substitution at nucleotide position 2570. The arginine at codon 857 is replaced by leucine, an amino acid with dissimilar properties. This amino acid position is well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.
Invitae RCV003626660 SCV004521604 uncertain significance Retinoblastoma 2023-02-15 criteria provided, single submitter clinical testing This sequence change replaces arginine, which is basic and polar, with leucine, which is neutral and non-polar, at codon 857 of the RB1 protein (p.Arg857Leu). This variant is present in population databases (rs144668210, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with RB1-related conditions. ClinVar contains an entry for this variant (Variation ID: 821504). 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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on RB1 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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