ClinVar Miner

Submissions for variant NM_000742.4(CHRNA2):c.1434C>A (p.Asp478Glu) (rs56344740)

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Total submissions: 8
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000124278 SCV000167705 benign not specified 2013-05-13 criteria provided, single submitter clinical testing This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease.
Invitae RCV001080927 SCV000285613 benign Autosomal dominant nocturnal frontal lobe epilepsy 2019-12-31 criteria provided, single submitter clinical testing
Illumina Clinical Services Laboratory,Illumina RCV000768183 SCV000473182 benign Epilepsy, nocturnal frontal lobe, type 4 2018-01-13 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 benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease.
Center for Pediatric Genomic Medicine,Children's Mercy Hospital and Clinics RCV000419685 SCV000511714 likely benign not provided 2016-09-01 criteria provided, single submitter clinical testing Converted during submission to Likely benign.
EGL Genetic Diagnostics,Eurofins Clinical Diagnostics RCV000124278 SCV000706592 likely benign not specified 2017-03-13 criteria provided, single submitter clinical testing
Ambry Genetics RCV000717520 SCV000848373 likely benign Seizures 2018-09-09 criteria provided, single submitter clinical testing In silico models in agreement (benign);Subpopulation frequency in support of benign classification
Center for Genomics, Ann and Robert H. Lurie Children's Hospital of Chicago RCV000768183 SCV000898604 uncertain significance Epilepsy, nocturnal frontal lobe, type 4 2017-12-06 criteria provided, single submitter clinical testing CHRNA2 NM_000742.3 exon 6 p.Asp478Glu (c.1434C>A): This variant has not been reported in the literature but is present in 0.5% (685/126322) of European alleles, including 1 homozygote, in the Genome Aggregation Database ( This variant is present in ClinVar, with several labs classifying this variant as likely benign or benign (Variation ID:136753). Evolutionary conservation and computational predictive tools suggest that this variant may not impact the protein. Functional studies predict that this variant will impact the protein (Dash 2014 PMID:24950454). However, these studies may not accurately represent human biological function. In summary, data on this variant is insufficient for disease classification. Therefore, the clinical significance of this variant is uncertain.
Athena Diagnostics Inc RCV000419685 SCV001143532 benign not provided 2018-11-12 criteria provided, single submitter clinical testing

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