Search by BoMiProt ID - Bomi263

Primary Information

BoMiProt ID Bomi263
Protein Name Dystroglycan
Organism Bos taurus
Uniprot IDO18738
Milk FractionWhey
Ref Sequence ID NP_776587.1
Aminoacid Length 895
Molecular Weight 97321
FASTA Sequence Download
Gene Name DAG1
Gene ID 281439
Protein Existence Status Reviewed: Experimental evidence at protein level

Secondary Information

Protein Function key signaling modulators of cellular architecture, and function during embryonic and post-natal development; play a role in basement membrane formation; role in epithelial morphogenesis in kidney, lung, and salivary gland. Dystroglycan functions as part of a synaptic partner recognition complex that is required early for CCK+ interneuron development in the forebrain.
Biochemical Properties integral component of the dystrophin glycoprotein complex; α- and ß-dystroglycan are obligate partners; In skeletal muscle, a-dystroglycan binds to the extracellular matrix component laminin α2-chain, whereas the intracellular domain of b-dystroglycan binds to the cytoskeletal protein dystrophin; a-dystroglycan binds laminin-1, agrin, and perlecan
Significance in milk in mammary epithelial cell type DG is essential for receptor-facilitated laminin anchoring and assembly
PTMs heterodimeric glycoprotein- undergoes N-linked and extensive O-linked glycosylation; contains a large mucin-like domain with a number of Ser or Thr residues, which are potential sites for O-glycosylation; Dystroglycan also contains four potential N-linked glycosylation sites, three in -dystroglycan and one in Glycosylated: -dystroglycan ; The O-linked glycoconjugates contain a fairly unique sugar linkage where mannose is directly coupled to serine or threonine in the dystroglycan peptide
Site(s) of PTM(s)

N-glycosylation, O-glycosylation,
Predicted Disorder Regions 164-172,323-362,381-462,484-490,726-746,827-841
DisProt Annotation
TM Helix Prediction 1TMH;(753-775)
Significance of PTMs required for ligand binding and the reaction of monoclonal antibodies
Bibliography 1. Ervasti, J. M. and Campbell, K. P. (1993) ‘A role for the dystrophin-glycoprotein complex as a transmembrane linker between laminin and actin’, The Journal of Cell Biology, 122(4), pp. 809–823. doi: 10.1083/jcb.122.4.809.
2. Durbeej, M. and Campbell, K. P. (1999) ‘Biochemical characterization of the epithelial dystroglycan complex.’, The Journal of biological chemistry, 274(37), pp. 26609–16. doi: 10.1074/jbc.274.37.26609.
3. Weir, M. L. et al. (2006) ‘Dystroglycan loss disrupts polarity and beta-casein induction in mammary epithelial cells by perturbing laminin anchoring.’, Journal of cell science, 119(Pt 19), pp. 4047–58. doi: 10.1242/jcs.03103.
4. Ibraghimov-Beskrovnaya, O. et al. (1992) ‘Primary structure of dystrophin-associated glycoproteins linking dystrophin to the extracellular matrix’, Nature, 355(6362), pp. 696–702. doi: 10.1038/355696a0.
5. Smalheiser, N. R. et al. (1998) ‘Structural analysis of sequences O-linked to mannose reveals a novel Lewis X structure in cranin (dystroglycan) purified from sheep brain.’, The Journal of biological chemistry, 273(37), pp. 23698–703. doi: 10.1074/jbc.273.37.23698.
6. Chiba, A. et al. (1997) ‘Structures of Sialylated O -Linked Oligosaccharides of Bovine Peripheral Nerve α-Dystroglycan’, Journal of Biological Chemistry, 272(4), pp. 2156–2162. doi: 10.1074/jbc.272.4.2156. 7.Miller DS, Wright KM. Neuronal Dystroglycan regulates postnatal development of CCK/cannabinoid receptor-1 interneurons. Neural Dev. 2021 Aug 6;16(1):4. doi: 10.1186/s13064-021-00153-1. PMID: 34362433; PMCID: PMC8349015.