The sarcoglycan transmembrane proteins are members of the dystrophin complex. Sarcoglycans cluster together to form a complex, which is localized in the cell membrane of skeletal, cardiac and smooth muscle fibers. Four sarcoglycan subunit proteins, designated α-, β-, γ- and δ-sarcoglycan, form a complex on the skeletal muscle cell surface membrane. A genetic defect in any one of these proteins causes the loss or marked decrease of the whole sarcoglycan complex, which is observed in the autosomal recessive muscular dystrophy, sarcoglycanopathy. In smooth muscle, β- and δ-sarcoglycans are associated with ε-sarcoglycan, a glycoprotein homologous to α-sarcoglycan. Additionally, a complete deficiency in δ-sarcoglycan is the cause of the Syrian hamster BIO.14 cardiomyopathy.
Background References
1. Van den Bergen JC et al. Clinical characterisation of Becker muscular dystrophy patients predicts favourable outcome in exon-skipping therapy. J Neurol Neurosurg Psychiatry N/A:N/A (2013).
2. Cingolani, E. et al. 2014. Engineered Electrical Conduction Tract Restores Conduction in Complete Heart Block J Am Coll Cardiol.. 64: 2575-2585.
Sequence Similarity
Belongs to the sarcoglycan beta/delta/gamma/zeta family.
Immunohistochemical analysis of paraffin-embedded human striated muscle tissue with Rabbit anti-gamma Sarcoglycan antibody (ET1704-24) at 1/200 dilution.
The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET1704-24) at 1/200 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
Western blot analysis of gamma Sarcoglycan on different lysates with Rabbit anti-gamma Sarcoglycan antibody (ET1704-24) at 1/1,000 dilution.
Lane 1: MCF-7 (Human breast cancer cell) cell lysate
Lysates/proteins at 20 µg/Lane. Exposure time: 25 seconds; ECL: K1802
Blocking: 5% NFDM/TBST, 1 hour at room temperature Primary antibody: ET1704-24, 1/1,000 in primary antibody dilution buffer (K1803), overnight at 4 ℃ Secondary antibody: Goat anti-Rabbit IgG-HRP (HA1001), 1/50,000 in 5% NFDM/TBST, 1 hour at room temperature
Predicted band size: 32 kDa Observed band size: 32 kDa
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