SGCB

Beta-sarcoglycan is a protein that in humans is encoded by the SGCB gene.

SGCB
Identifiers
Aliases	SGCB, A3b, LGMD2E, SGC, sarcoglycan beta, LGMDR4
External IDs	OMIM: 600900; MGI: 1346523; HomoloGene: 195; GeneCards: SGCB; OMA:SGCB - orthologs
Gene location (Human) Chr. Chromosome 4 (human) Band 4q12 Start 52,020,706 bp End 52,038,299 bp
Gene location (Mouse) Chr. Chromosome 5 (mouse) Band 5|5 C3.3 Start 73,790,092 bp End 73,805,133 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in tendon of biceps brachii Skeletal muscle tissue of rectus abdominis Skeletal muscle tissue of biceps brachii right ventricle ganglionic eminence internal globus pallidus trigeminal ganglion ventricular zone sperm tibia Top expressed in triceps brachii muscle temporal muscle sternocleidomastoid muscle right ventricle digastric muscle ankle muscle of thigh myocardium of ventricle intercostal muscle quadriceps femoris muscle More reference expression data BioGPS More reference expression data
Orthologs Species Human Mouse Entrez 6443 24051 Ensembl ENSG00000163069 ENSMUSG00000029156 UniProt Q16585 Q5U0N0 P82349 RefSeq (mRNA) NM_000232 NM_011890 RefSeq (protein) NP_000223 NP_000223.1 NP_036020 Location (UCSC) Chr 4: 52.02 – 52.04 Mb Chr 5: 73.79 – 73.81 Mb PubMed search
Wikidata
View/Edit Human View/Edit Mouse

The dystrophin-glycoprotein complex (DGC) is a multisubunit protein complex that spans the sarcolemma and provides structural linkage between the subsarcolemmal cytoskeleton and the extracellular matrix of muscle cells. There are 3 main subcomplexes of the DGC: the cytoplasmic proteins dystrophin (DMD; MIM 300377) and syntrophin (SNTA1; MIM 601017), the alpha- and beta-dystroglycans (see MIM 128239), and the sarcoglycans (see, e.g., SGCA; MIM 600119) (Crosbie et al., 2000).[supplied by OMIM].

Clinical significance

Mutations in the SGCB gene are known to cause Limb-girdle muscular dystrophy, autosomal recessive 4 (LGMDR4). This condition causes pelvic and shoulder muscle wasting, usually from childhood.

Further reading

• Yoshida M, Ozawa E (1991). "Glycoprotein complex anchoring dystrophin to sarcolemma". J. Biochem. 108 (5): 748–52. doi:10.1093/oxfordjournals.jbchem.a123276. PMID 2081733.
• Lim LE, Duclos F, Broux O, et al. (1995). "Beta-sarcoglycan: characterization and role in limb-girdle muscular dystrophy linked to 4q12". Nat. Genet. 11 (3): 257–65. doi:10.1038/ng1195-257. PMID 7581448. S2CID 729999.
• Bönnemann CG, Modi R, Noguchi S, et al. (1995). "Beta-sarcoglycan (A3b) mutations cause autosomal recessive muscular dystrophy with loss of the sarcoglycan complex". Nat. Genet. 11 (3): 266–73. doi:10.1038/ng1195-266. PMID 7581449. S2CID 13130455.
• Duggan DJ, Gorospe JR, Fanin M, et al. (1997). "Mutations in the sarcoglycan genes in patients with myopathy". N. Engl. J. Med. 336 (9): 618–24. doi:10.1056/NEJM199702273360904. PMID 9032047.
• Fougerousse F, Durand M, Suel L, et al. (1998). "Expression of genes (CAPN3, SGCA, SGCB, and TTN) involved in progressive muscular dystrophies during early human development". Genomics. 48 (2): 145–56. doi:10.1006/geno.1997.5160. PMID 9521867.
• Duclos F, Broux O, Bourg N, et al. (1998). "Beta-sarcoglycan: genomic analysis and identification of a novel missense mutation in the LGMD2E Amish isolate". Neuromuscul. Disord. 8 (1): 30–8. doi:10.1016/S0960-8966(97)00135-1. PMID 9565988. S2CID 6206714.
• Bönnemann CG, Wong J, Ben Hamida C, et al. (1998). "LGMD 2E in Tunisia is caused by a homozygous missense mutation in beta-sarcoglycan exon 3". Neuromuscul. Disord. 8 (3–4): 193–7. doi:10.1016/S0960-8966(98)00014-5. PMID 9631401. S2CID 22059919.
• Chan YM, Bönnemann CG, Lidov HG, Kunkel LM (1999). "Molecular organization of sarcoglycan complex in mouse myotubes in culture". J. Cell Biol. 143 (7): 2033–44. doi:10.1083/jcb.143.7.2033. PMC 2175228. PMID 9864373.
• dos Santos MR, Jorge P, Ribeiro EM, et al. (2000). "Noval mutation (Y184C) in exon 4 of the beta-sarcoglycan gene identified in a Portuguese patient. Mutations in brief no. 177. Online". Hum. Mutat. 12 (3): 214–5. PMID 10660328.
• Barresi R, Di Blasi C, Negri T, et al. (2000). "Disruption of heart sarcoglycan complex and severe cardiomyopathy caused by beta sarcoglycan mutations". J. Med. Genet. 37 (2): 102–7. doi:10.1136/jmg.37.2.102. PMC 1734518. PMID 10662809.
• Durbeej M, Cohn RD, Hrstka RF, et al. (2000). "Disruption of the beta-sarcoglycan gene reveals pathogenetic complexity of limb-girdle muscular dystrophy type 2E" (PDF). Mol. Cell. 5 (1): 141–51. doi:10.1016/S1097-2765(00)80410-4. PMID 10678176.
• Yoshida M, Hama H, Ishikawa-Sakurai M, et al. (2000). "Biochemical evidence for association of dystrobrevin with the sarcoglycan-sarcospan complex as a basis for understanding sarcoglycanopathy". Hum. Mol. Genet. 9 (7): 1033–40. doi:10.1093/hmg/9.7.1033. PMID 10767327.
• Fanin M, Hoffman EP, Angelini C, Pegoraro E (2000). "Private beta- and gamma-sarcoglycan gene mutations: evidence of a founder effect in Northern Italy". Hum. Mutat. 16 (1): 13–7. doi:10.1002/1098-1004(200007)16:1<13::AID-HUMU3>3.0.CO;2-V. PMID 10874299. S2CID 44664935.
• Radojevic V, Lin S, Burgunder JM (2000). "Differential expression of dystrophin, utrophin, and dystrophin-associated proteins in human muscle culture". Cell Tissue Res. 300 (3): 447–57. doi:10.1007/s004410000213. PMID 10928275. S2CID 12001595.
• Crosbie RH, Lim LE, Moore SA, et al. (2000). "Molecular and genetic characterization of sarcospan: insights into sarcoglycan-sarcospan interactions". Hum. Mol. Genet. 9 (13): 2019–27. doi:10.1093/hmg/9.13.2019. PMID 10942431.
• Barresi R, Moore SA, Stolle CA, et al. (2001). "Expression of gamma -sarcoglycan in smooth muscle and its interaction with the smooth muscle sarcoglycan-sarcospan complex". J. Biol. Chem. 275 (49): 38554–60. doi:10.1074/jbc.M007799200. PMID 10993904.
• Wakayama Y, Inoue M, Kojima H, et al. (2002). "Localization of sarcoglycan, neuronal nitric oxide synthase, beta-dystroglycan, and dystrophin molecules in normal skeletal myofiber: triple immunogold labeling electron microscopy". Microsc. Res. Tech. 55 (3): 154–63. doi:10.1002/jemt.1166. PMID 11747090. S2CID 22683866.
• Fanin M, Angelini C (2002). "Defective assembly of sarcoglycan complex in patients with beta-sarcoglycan gene mutations. Study of aneural and innervated cultured myotubes". Neuropathol. Appl. Neurobiol. 28 (3): 190–9. doi:10.1046/j.1365-2990.2002.00389.x. PMID 12060343. S2CID 32274307.
• Wheeler MT, Zarnegar S, McNally EM (2003). "Zeta-sarcoglycan, a novel component of the sarcoglycan complex, is reduced in muscular dystrophy". Hum. Mol. Genet. 11 (18): 2147–54. doi:10.1093/hmg/11.18.2147. PMID 12189167.

External links

• LOVD mutation database: SGCB