ClinVar Miner

Submissions for variant NM_001037.5(SCN1B):c.-1C>T

dbSNP: rs1057518527
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000414531 SCV000492258 uncertain significance not specified 2016-12-05 criteria provided, single submitter clinical testing A variant of uncertain significance has been identified in the SCN1B gene. The c.-1 C>T variant has not been published as a pathogenic variant, nor has it been reported as a benign variant to our knowledge. Although the c.-1 C>T variant was not observed in approximately 1,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, the data was noted to have reduced depth of sequencing reads and therefore may be unreliable. It occurs at a position that is conserved in mammals. This substitution alters a position in the Kozak sequence, which is located in the 5' untranslated region (UTR) of the gene and plays a role in the initiation of protein translation. However, in the absence of RNA/functional studies, the actual effect of this sequence change in this individual is unknown. Additionally, variants in the 5' UTR of the SCN1B gene have not been reported in the Human Gene Mutation Database (Stenson et al., 2014). Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant.
Ambry Genetics RCV002418238 SCV002724211 uncertain significance Cardiovascular phenotype 2020-03-17 criteria provided, single submitter clinical testing The c.-1C>T variant is located in the 5' untranslated region (5’ UTR) of the SCN1B gene. This variant results from a C to T substitution 1 base upstream from the first translated codon. This nucleotide position is highly conserved in available vertebrate species. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

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