ClinVar Miner

Submissions for variant NM_003000.3(SDHB):c.812C>T (p.Ala271Val)

dbSNP: rs2077945936
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV001314208 SCV001504733 uncertain significance Gastrointestinal stromal tumor; Paragangliomas 4; Pheochromocytoma 2020-03-19 criteria provided, single submitter clinical testing 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 valine 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. This variant has not been reported in the literature in individuals with SDHB-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces alanine with valine at codon 271 of the SDHB protein (p.Ala271Val). The alanine residue is moderately conserved and there is a small physicochemical difference between alanine and valine. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site, but this prediction has not been confirmed by published transcriptional studies. 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 RCV001776188 SCV002012665 uncertain significance not provided 2021-02-25 criteria provided, single submitter clinical testing Not observed in large population cohorts (Lek 2016); Has not been previously published as pathogenic or benign to our knowledge; In silico analysis suggests this variant may impact gene splicing. In the absence of RNA/functional studies, the actual effect of this sequence change is unknown.; In silico analysis supports that this missense variant does not alter protein structure/function

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