• Turnaround time:
    10–21 calendar days (14 days on average)
  • Preferred specimen:
    3mL whole blood in a purple-top tube
  • Alternate specimens:
    DNA or saliva/assisted saliva
  • Sample requirements
  • Request a sample kit



EJM1; dJ304B14.2

Associated disorders

The EFHC1 gene is associated with autosomal dominant juvenile myoclonic epilepsy (JME) (MedGen UID: 342587) and juvenile absence epilepsy (JAE) (MedGen UID: 4989).

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Invitae tests that include this gene:

Pathogenic variants in the EFHC1 gene are associated with 2-3% of clinical cases of idiopathic generalized epilepsy.

The EFHC1 gene encodes a protein of largely unknown function. It is expressed in the brain and has been shown to bind calcium, suggesting that it may participate in calcium homeostasis. It is also thought to play a role in cell death (apoptosis), and organization of the microtubule network for cell division and cell migration (PMID: 22787620)

Assay and technical information

Invitae is a College of American Pathologists (CAP)-accredited and Clinical Laboratory Improvement Amendments (CLIA)-certified clinical diagnostic laboratory performing full-gene sequencing and deletion/duplication analysis using next-generation sequencing technology (NGS).

Our sequence analysis covers clinically important regions of each gene, including coding exons, +/- 10 base pairs of adjacent intronic sequence, and select noncoding variants. Our assay provides a Q30 quality-adjusted mean coverage depth of 350x (50x minimum, or supplemented with additional analysis). Variants classified as pathogenic or likely pathogenic are confirmed with orthogonal methods, except individual variants that have high quality scores and previously validated in at least ten unrelated samples.

Our analysis detects most intragenic deletions and duplications at single exon resolution. However, in rare situations, single-exon copy number events may not be analyzed due to inherent sequence properties or isolated reduction in data quality. If you are requesting the detection of a specific single-exon copy number variation, please contact Client Services before placing your order.

Gene Transcript reference Sequencing analysis Deletion/Duplication analysis
EFHC1 NM_018100.3