• 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

Associated disorders

The HSPB8 gene is associated with autosomal dominant Charcot-Marie-Tooth disease type 2L (CMT2L) (MedGen UID: 324826) and distal hereditary motor neuropathy 2A (HMN2A) (MedGen UID: 322471).

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Invitae tests that include this gene:

HSPB8 is a rare cause of CMT and distal hereditary motor neuropathy, and the percentage of cases of these conditions attributed to pathogenic variants identified in HSPB8 is unknown.

The gene HSPB8 encodes a protein called heat shock 22-KD protein 8. Although this protein is found in cells throughout the body, it is particularly abundant in nerve cells, where it facilitates the removal of misfolded proteins and promotes cell survival.

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
HSPB8 NM_014365.2