• 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



ATFB11; CX40

Associated disorders

The GJA5 gene currently has no well-established disease association; however, there is preliminary evidence supporting a correlation with autosomal dominant atrial standstill (MedGen UID: 333120), atrial fibrillation (MedGen UID: 481323), and tetrology of Fallot (PMID: 22713807).

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Invitae tests that include this gene:

Pathogenic GJA5 variants are associated with an unknown percentage of clinical cases of atrial standstill, atrial fibrillation, and tetrology of Fallot.

The GJA5 gene encodes the cardiac gap junction protein alpha 5, which is expressed in atrial myocytes and is involved in electrical activation of the atria.

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
GJA5 NM_005266.6