Epsilon-sarcoglycan (SGCE)

Epsilon-sarcoglycan is a **transmembrane protein** encoded by the SGCE gene. It is a member of the sarcoglycan family and an integral component of the **dystrophin-glycoprotein complex (DGC)**, which links the cytoskeleton to the extracellular matrix to stabilize the sarcolemma (muscle cell membrane)[2][1]. SGCE is predominantly expressed in **muscle and brain**, with high levels in neurons and muscle cells[3]. There are multiple alternatively spliced isoforms, with some variants being brain-specific[4]. Mutations in the SGCE gene, which is inherited in an autosomal dominant but *imprinted* manner (only the paternal allele is active), cause **myoclonic dystonia (DYT11)**, a neurogenetic disorder characterized by involuntary muscle contractions and jerks[2][3]. SGCE's precise role in brain synapses is not fully known, but it is suspected to participate in neuron-neuron communication[3]. No drugs directly target this protein at present, but its mutation status serves as a useful biomarker in genetic diagnosis of dystonia[2][3].

Other names

Epsilon-sarcoglycanSGCEESGUNQ433/PRO840Epsilon-SGDYT11dystonia 11, myoclonicepsilon-SGepsilon-sarcoglycan

Not applicable; SGCE is not a receptor or enzyme amenable to classical inhibitory or activating drugs. Disease-modifying approaches would theoretically focus on molecular rescue, gene therapy, or symptomatic control (for myoclonic dystonia).