Submissions for variant NM_014874.3(MFN2):c.1818C>T (p.Gly606=) (rs373843969)

Total submissions: 3

Submitter	RCV	SCV	Clinical significance	Condition	Last evaluated	Review status	Method	Comment
Illumina Clinical Services Laboratory,Illumina	RCV000653932	SCV000347997	likely benign	Charcot-Marie-Tooth disease, type 2	2018-01-12	criteria provided, single submitter	clinical testing	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease.
Illumina Clinical Services Laboratory,Illumina	RCV000384747	SCV000347998	likely benign	Hereditary motor and sensory neuropathy with optic atrophy	2018-01-12	criteria provided, single submitter	clinical testing	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease.
Invitae	RCV000653932	SCV000775822	uncertain significance	Charcot-Marie-Tooth disease, type 2	2020-10-27	criteria provided, single submitter	clinical testing	This sequence change affects codon 606 of the MFN2 mRNA. It is a 'silent' change, meaning that it does not change the encoded amino acid sequence of the MFN2 protein. This variant is present in population databases (rs373843969, ExAC 0.04%). This variant has not been reported in the literature in individuals with MFN2-related disease. ClinVar contains an entry for this variant (Variation ID: 292376). 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.