• 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



ALS16; DSMA2; OPRS1; SIG-1R; SR-BP; SR-BP1; SRBP; hSigmaR1; sigma1R

Associated disorders

The SIGMAR1 gene is associated with autosomal recessive distal spinal muscular atrophy 2 (DSMA2) (MedGen UID: 344189). Additionally, the SIGMAR1 gene has preliminary evidence supporting a correlation with autosomal recessive amyotrophic lateral sclerosis 16 (ALS16) (MedGen UID: 482217).

Order single gene


Order this gene as a single gene test.

Order a test

Invitae tests that include this gene:

The SIGMAR1 gene encodes the sigma non-opioid receptor 1 protein, which is important for neuron maintenance and survival. Although the precise function of this protein is still under investigation, experimental studies have linked it to the unfolded protein response and protein degradation pathways.

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
SIGMAR1 NM_005866.3