Glycogenin 1 (GYG1) catalyzes its autoglycosylation reaction with UDP-glucose to form oligo (1,4)-alpha-D-glucosyl GYG1 (Moslemi et al. 2010). The oligosaccharide is annotated here as containing four glucose residues. Glycogenin occurs as a homodimer complexed with two molecules of glycogen synthase 1 (GYS1), here in an unphosphorylated (a) form (Roach et al. 2012).
Nilsson, J, Oldfors, A, Lindberg, C, Moslemi, AR, Andersson, B, Tajsharghi, H
Hurley, TD, Roach, PJ, Tagliabracci, VS, DePaoli-Roach, AA
glycogenin glucosyltransferase activity of GYG1:GYS1-a tetramer [cytosol]
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