Glycogen phosphorylase (EC 2.4.1.1)
- EC 2.-.-.- Transferases
- EC 2.4.-.- Glycosyltransferases
- EC 2.4.1.- Hexosyltransferases
- Modify:2025-01-26
This entry covers several enzymes from different sources that act in vivo on different forms of (1->4)-alpha-D-glucans
Some of these enzymes catalyze the first step in the degradation of large branched glycan polymers - the phosphorolytic cleavage of alpha-1,4-glucosidic bonds from the non-reducing ends of linear poly(1->4)-alpha-D-glucosyl chains within the polymers
The enzyme stops when it reaches the fourth residue away from an alpha-1,6 branching point, leaving a highly branched core known as a limit dextrin
The description (accepted name) of the enzyme should be modified for each specific instance by substituting 'glycogen' with the name of the natural substrate, e.g. maltodextrin phosphorylase, starch phosphorylase, etc
- Amylophosphorylase
- Muscle phosphorylase a and b
- Polyphosphorylase
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- PubChem
- Medical Subject Headings (MeSH)LICENSEWorks produced by the U.S. government are not subject to copyright protection in the United States. Any such works found on National Library of Medicine (NLM) Web sites may be freely used or reproduced without permission in the U.S.https://www.nlm.nih.gov/copyright.htmlGlycogen Phosphorylasehttps://meshb.nlm.nih.gov/record/ui?ui=D024981
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