• 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 CHRNA1 gene is associated with autosomal recessive and dominant forms of congenital myasthenic syndrome (CMS) (MedGen UIDs: 373259, 199759) and autosomal recessive fetal akinesia deformation sequence (FADS) (MedGen UID: 381473).

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Invitae tests that include this gene:

Pathogenic variants in CHRNA1 are estimated to cause less than 1% of congenital myasthenic syndrome.

CHRNA1 encodes the alpha subunit of the muscle acetylcholine receptor. The acetylcholine receptor in postnatal muscle is composed of five subunits (2 alpha, 1 beta, 1 epsilon, and 1 delta) whereas in prenatal muscle the epsilon subunit is replaced by a gamma subunit. The acetylcholine receptor is located at the neuromuscular junction where it binds acetylcholine released by the terminal nerve cell.

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
CHRNA1 NM_000079.3