• 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 in the transcript listed below. In addition, analysis covers the select non-coding variants specifically defined in the table below. Any variants that fall outside these regions are not analyzed. Any specific limitations in the analysis of these genes are also listed in the table below.

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