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  • Preferred specimen:
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  • Alternate specimens:
    DNA or saliva/assisted saliva
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DYSF

Alias

FER1L1; LGMD2B; MMD1

Associated disorders

The DYSF gene is associated with autosomal recessive Miyoshi muscular dystrophy type 1 (MMD1) (MedGen UID: 338128), limb-girdle muscular dystrophy type 2B (LGMD2B) (MedGen UID: 338149), and distal myopathy with anterior tibial onset (DMAT) (MedGen UID: 335706), collectively known as the dysferlinopathies (MedGen UID: 419874).

Pathogenic variants in the DYSF gene cause an estimated 2% of LGMD overall and 5% of autosomal recessive LGMD. DYSF is also a major cause of Miyoshi myopathy.

The DYSF gene encodes a transmembrane protein that is expressed in skeletal muscle, where it functions in membrane repair.

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
DYSF NM_003494.3; NM_001130978.1