Glycogenin
Enzyme involved in converting glucose to glycogen / From Wikipedia, the free encyclopedia
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Glycogenin is an enzyme involved in converting glucose to glycogen. It acts as a primer, by polymerizing the first few glucose molecules, after which other enzymes take over. It is a homodimer of 37-kDa subunits and is classified as a glycosyltransferase.
Quick Facts Identifiers, EC no. ...
glycogenin glucosyltransferase | |||||||||
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Identifiers | |||||||||
EC no. | 2.4.1.186 | ||||||||
CAS no. | 117590-73-5 | ||||||||
Databases | |||||||||
IntEnz | IntEnz view | ||||||||
BRENDA | BRENDA entry | ||||||||
ExPASy | NiceZyme view | ||||||||
KEGG | KEGG entry | ||||||||
MetaCyc | metabolic pathway | ||||||||
PRIAM | profile | ||||||||
PDB structures | RCSB PDB PDBe PDBsum | ||||||||
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It catalyzes the chemical reactions:
- UDP-alpha-D-glucose + glycogenin ā UDP + alpha-D-glucosylglycogenin
- UDP-alpha-D-glucose + a glucosyl-glycogenin ā (1,4-alpha-D-glucosyl)n-glucosyl glucogenin + UDP + H+
Thus, the two substrates of this enzyme are UDP-alpha-D-glucose and glycogenin, whereas its two products are UDP and alpha-D-glucosylglycogenin.[2][3]