Associated disorders

The IKBKAP gene is associated with autosomal recessive familial dysautonomia, also known as hereditary sensory and autonomic neuropathy type 3 (HSAN3) (MedGen UID: 41678).

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Pathogenic variants in IKBKAP are the only known cause of familial dysautonomia. In Ashkenazi Jews, two specific pathogenic variants, detectable by sequence analysis, account for greater than 99% of cases.

The IKBKAP gene encodes the inhibitor of kappa light polypeptide gene enhancer in B-cells protein, also known as IKAP. This protein is a member of the elongator complex, which plays a role in transcriptional elongation as well as neuronal development.

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
IKBKAP NM_003640.3