ClinVar Miner

Submissions for variant NM_003001.5(SDHC):c.77+1G>A

dbSNP: rs1558164647
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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 RCV001026732 SCV001189169 likely pathogenic Hereditary cancer-predisposing syndrome 2018-08-29 criteria provided, single submitter clinical testing The c.77+1G>A intronic variant results from a G to A substitution one nucleotide after coding exon 2 of the SDHC gene. This nucleotide position is highly conserved in available vertebrate species. Using the BDGP and ESEfinder splice site prediction tools, this alteration is predicted to abolish the native splice donor site; however, direct evidence is unavailable. Alterations that disrupt the canonical splice site are expected to cause aberrant splicing, resulting in an abnormal protein or a transcript that is subject to nonsense-mediated mRNA decay. As such, this alteration is classified as likely pathogenic.
Invitae RCV001221046 SCV001393068 likely pathogenic Gastrointestinal stromal tumor; Paragangliomas 3 2022-07-29 criteria provided, single submitter clinical testing In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. ClinVar contains an entry for this variant (Variation ID: 827209). This variant has not been reported in the literature in individuals affected with SDHC-related conditions. This variant is present in population databases (no rsID available, gnomAD 0.003%). This sequence change affects a donor splice site in intron 2 of the SDHC gene. It is expected to disrupt RNA splicing. Variants that disrupt the donor or acceptor splice site typically lead to a loss of protein function (PMID: 16199547), and loss-of-function variants in SDHC are known to be pathogenic (PMID: 17667967, 19454582, 23282968, 24758179).

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