ClinVar Miner

Submissions for variant NM_015141.4(GPD1L):c.691C>T (p.Arg231Cys)

gnomAD frequency: 0.00002  dbSNP: rs143486835
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Total submissions: 4
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000170925 SCV000223483 uncertain significance not provided 2024-12-17 criteria provided, single submitter clinical testing In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge
Labcorp Genetics (formerly Invitae), Labcorp RCV000553182 SCV000637062 likely benign Brugada syndrome 2024-07-19 criteria provided, single submitter clinical testing
Ambry Genetics RCV000619197 SCV000738160 uncertain significance Cardiovascular phenotype 2019-12-23 criteria provided, single submitter clinical testing The p.R231C variant (also known as c.691C>T), located in coding exon 6 of the GPD1L gene, results from a C to T substitution at nucleotide position 691. The arginine at codon 231 is replaced by cysteine, an amino acid with highly dissimilar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.
Women's Health and Genetics/Laboratory Corporation of America, LabCorp RCV001844065 SCV002103895 likely benign not specified 2022-02-07 criteria provided, single submitter clinical testing Variant summary: GPD1L c.691C>T (p.Arg231Cys) results in a non-conservative amino acid change located in the Glycerol-3-phosphate dehydrogenase, NAD-dependent, C-terminal domain (IPR006109) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.00011 in 250868 control chromosomes (gnomAD). The observed variant frequency is approximately 21 fold of the estimated maximal expected allele frequency for a pathogenic variant in GPD1L causing Brugada Syndrome phenotype (5e-06), strongly suggesting that the variant is benign. To our knowledge, no occurrence of c.691C>T in individuals affected with Brugada Syndrome and no experimental evidence demonstrating its impact on protein function have been reported. Two clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 and classified the variant as likely benign (n=1), and one laboratory classified the variant as uncertain significance (n=1). Based on the evidence outlined above, the variant was classified as likely benign.

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