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Beta-sarcoglycan (SGCB)

Target: SGCB
Molecular classification: Transmembrane protein, Glycoprotein, Sarcoglycan beta/delta/gamma/zeta family

Overview

Beta-sarcoglycan is a transmembrane protein that is part of the sarcoglycan complex within the dystrophin-glycoprotein complex (DGC). It is crucial for maintaining the structural integrity of muscle fibers by linking the cytoskeleton to the extracellular matrix. Mutations in the SGCB gene cause limb-girdle muscular dystrophy type 2E (LGMD2E), characterized by progressive muscle weakness and wasting. Beta-sarcoglycan is primarily expressed in striated and smooth muscles.

Other names: 43 kDa dystrophin-associated glycoprotein43DAGA3bbeta-SGLGMD2ESGC

Biological functions

Mechanical stabilization of muscle fibersLinks cytoskeleton to extracellular matrixStabilizes interactions within dystrophin-glycoprotein complex (DGC)Protects muscle fibers from injury during contractionCell-matrix adhesionSignal transduction

Disease associations

Limb-girdle muscular dystrophy autosomal recessive type 4 (LGMDR4)LGMD2ESarcoglycanopathy

Safety considerations

Potential for immune response against gene therapy vectorsChallenges in delivering gene therapy specifically to muscle tissueOff-target effects of gene editing technologies

Biomarkers

Beta-sarcoglycan levels in muscle biopsies (diagnostic biomarker)Genetic mutations in SGCB gene (diagnostic biomarker)

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