ClinVar Miner

Submissions for variant NM_003000.3(SDHB):c.287-1G>C (rs397516833)

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Total submissions: 7
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Laboratory for Molecular Medicine, Partners HealthCare Personalized Medicine RCV000037719 SCV000061381 likely pathogenic Hereditary Paraganglioma-Pheochromocytoma Syndromes 2012-12-06 criteria provided, single submitter clinical testing The 287-1G>C variant in SDHB has been reported in one individual with paragangli oma and segregated with disease in one affected relative in that family (Timmers 2007). This variant has also been identified in a benign paraganglioma sample ( Klein 2008). This variant occurs in the invariant region (+/- 1,2) of the splic e consensus sequence and is predicted to cause altered splicing leading to an ab normal or absent protein. In summary, the 287-1G>C variant is likely pathogenic, though additional studies are required to fully establish its clinical signific ance.
Ambry Genetics RCV000128907 SCV000172774 pathogenic Hereditary cancer-predisposing syndrome 2019-02-23 criteria provided, single submitter clinical testing The c.287-1G>C intronic pathogenic mutation results from a G to C substitution one nucleotide upstream from coding exon 4 of the SDHB gene. This alteration has been reported in an individual with PGL-PCC and a positive family history (Timmers HJ et al. J. Clin. Endocrinol. Metab. 2007 Mar;92:779-86). This alteration was also reported in three other patients with PGL-PCC (Klein RD et al. Diagn. Mol. Pathol. 2008 Jun;17:94-100; Jafri M et al. Clin. Endocrinol. (Oxf) 2013 Jun;78:898-906; Sue M et al. Eur. J. Endocrinol. 2015 Feb;172:89-95). A similar alteration (c.278-2A>G) has been reported in several families with PGL-PCC (Burnichon N et al. J. Clin. Endocrinol. Metab. 2009 Aug;94:2817-27; Neumann HP et al. JAMA 2004 Aug;292:943-51). In addition to the clinical data presented in the literature, 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 pathogenic.
EGL Genetic Diagnostics, Eurofins Clinical Diagnostics RCV000478921 SCV000343112 pathogenic not provided 2016-06-21 criteria provided, single submitter clinical testing
GeneDx RCV000478921 SCV000565544 pathogenic not provided 2017-11-16 criteria provided, single submitter clinical testing This variant is denoted SDHB c.287-1G>C or IVS3-1G>C and consists of a G>C nucleotide substitution at the -1 position of intron 3 of the SDHB gene. This variant destroys a canonical splice acceptor site and is predicted to cause abnormal gene splicing, leading to either an abnormal message that is subject to nonsense-mediated mRNA decay or to an abnormal protein product. This variant has been reported in multiple cases with malignant paraganglioma, at least one of which showed absence of SDHB staining by immunohistochemistry (Timmers 2007, He 2009, Fishbein 2013, Jafri 2013, Sue 2015, Del Forno 2016, Gupta 2016, Jochmanova 2017). Based on currently available evidence, we consider SDHB c.287-1G>C to be a pathogenic variant.
Counsyl RCV000332692 SCV000677729 pathogenic Paragangliomas 4 2017-05-02 criteria provided, single submitter clinical testing
Invitae RCV000633965 SCV000755238 pathogenic Gastrointestinal stromal tumor; Paragangliomas 4; Pheochromocytoma 2020-08-20 criteria provided, single submitter clinical testing This sequence change affects an acceptor splice site in intron 3 of the SDHB gene. It is expected to disrupt RNA splicing and likely results in an absent or disrupted protein product. This variant is not present in population databases (ExAC no frequency). This variant has been reported in individuals affected with pheochromocytoma and paraganglioma (PMID: 17200167, 27549546, 23072324, 18382370, 23512077). This variant is also known as IVS3-1 G>C in the literature. ClinVar contains an entry for this variant (Variation ID: 44642). Donor and acceptor splice site variants typically lead to a loss of protein function (PMID: 16199547), and loss-of-function variants in SDHB are known to be pathogenic (PMID: 19454582, 19802898). For these reasons, this variant has been classified as Pathogenic.
Section on Medical Neuroendocrinolgy,National Institutes of Health RCV000037719 SCV000599494 pathogenic Hereditary Paraganglioma-Pheochromocytoma Syndromes no assertion criteria provided research

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