• 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 KLHL40 gene is associated with autosomal recessive nemaline myopathy 8 (NEM8) (MedGen UID: 815539).

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Invitae tests that include this gene:

Percentage of nemaline myopathy caused by KLHL40 is unknown. However, 28 of 143 families with severe nemaline myopathy were found to have KLHL40 pathogenic variants. Therefore, KLHL40 may account for a significant portion of severe, neonatal-onset nemaline myopathy.

KLHL40 encodes a member of the BTB domain-containing Kelch family of proteins. KLHL40 is expressed in skeletal muscle, and is more abundant in fetal tissue than postnatal tissue. KLHL40 is thought to be involved with muscle development and maintenance via ubiquitin-dependent protein turnover.

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
KLHL40 NM_152393.3