ClinVar Miner

Submissions for variant NM_000384.3(APOB):c.1472T>C (p.Val491Ala)

gnomAD frequency: 0.00004  dbSNP: rs996700659
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV001838236 SCV000958441 uncertain significance Hypercholesterolemia, autosomal dominant, type B; Familial hypobetalipoproteinemia 1 2022-08-07 criteria provided, single submitter clinical testing This sequence change replaces valine, which is neutral and non-polar, with alanine, which is neutral and non-polar, at codon 491 of the APOB protein (p.Val491Ala). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with APOB-related conditions. ClinVar contains an entry for this variant (Variation ID: 660622). 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 alanine 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.
GeneDx RCV001772126 SCV001994154 uncertain significance not provided 2019-07-11 criteria provided, single submitter clinical testing Not observed in large population cohorts (Lek et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge
Ambry Genetics RCV002390671 SCV002697987 uncertain significance Cardiovascular phenotype 2021-12-29 criteria provided, single submitter clinical testing The p.V491A variant (also known as c.1472T>C), located in coding exon 12 of the APOB gene, results from a T to C substitution at nucleotide position 1472. The valine at codon 491 is replaced by alanine, an amino acid with similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

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