ClinVar Miner

Submissions for variant NM_004168.4(SDHA):c.770G>C (p.Gly257Ala)

dbSNP: rs749566947
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
“Giorgio Prodi” Cancer Research Center, University of Bologna RCV001799815 SCV002026142 pathogenic Gastrointestinal stromal tumor 2021-10-01 criteria provided, single submitter research
Labcorp Genetics (formerly Invitae), Labcorp RCV001885198 SCV002281383 uncertain significance Mitochondrial complex II deficiency, nuclear type 1; Paragangliomas 5 2022-07-25 criteria provided, single submitter clinical testing 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. Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 1325699). This variant has not been reported in the literature in individuals affected with SDHA-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glycine, which is neutral and non-polar, with alanine, which is neutral and non-polar, at codon 257 of the SDHA protein (p.Gly257Ala). This variant also falls at the last nucleotide of exon 6, which is part of the consensus splice site for this exon.

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