Associated disorders

The SACS gene is associated with autosomal recessive spastic ataxia of Charlevoix-Saguenay (ARSACS) (MedGen UID: 338620).

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Pathogenic variants in SACS are a rare form of hereditary spastic paraplegia but account for an estimated 13% of the complex HSP syndrome spastic ataxia of Charlevoix-Saguenay (ARSACS).

The SACS gene encodes the sacsin protein, which is expressed in neurons and may play a role in the degradation of misfolded or aggregated proteins by regulating the Hsp70 chaperone machinery.

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
SACS NM_014363.5