glycogen phosphorylase EC#: 2.4.1.1; ChemWhat Code: 1377223
| Product Name | glycogen phosphorylase |
| Example Structure |  |
| Synonyms | 1,4-alpha-glucan phosphorylase, alpha-1,4 glucan phosphorylase, alpha-1,4-glycan phosphorylase, alpha-glucan phosphorylase, alpha-glucan phosphorylase H, alpha-glucan/maltodextrin phosphorylase, alphaGP, amylopectin phosphorylase, amylophosphorylase, CcStP, cyosolic phosphorylase, GlgP, glucan phosphorylase, glucosan phosphorylase, glycogen phosphorylase, glycogen phosphorylase a, glycogen phosphorylase b, glycogen phosphorylase-a, GP, GP b, GPA, GPase, GPase a, GPb, GPBB, GPH, granulose phosphorylase, MalP, maltodextrin phosphorylase, More, muscle glycogen phosphorylase, muscle phosphorylase, muscle phosphorylase a and b, myophosphorylase, PF1535, Phb, PHO, Pho 2, Pho1, phosphorylase a, phosphorylase b, phosphorylase, alpha-glucan, plastidial phosphorylase, polyphosphorylase, potato phosphorylase, RMGPa, rmGPb, SP, starch phosphorylase, starch phosphorylase H, stGP, StP, tGPGG, type L alpha-glucan phosphorylase |
| EC Number | 2.4.1.1 |
| CAS Registry Number | 9035-74-9 |
| Comments | This entry covers several enzymes from different sources that act in vivo on different forms of (1¡ú4)-¦Á-D-glucans. Some of these enzymes catalyse the first step in the degradation of large branched glycan polymers – the phosphorolytic cleavage of ¦Á-1,4-glucosidic bonds from the non-reducing ends of linear poly(1¡ú4)-¦Á-D-glucosyl chains within the polymers. The enzyme stops when it reaches the fourth residue away from an ¦Á-1,6 branching point, leaving a highly branched core known as a limit dextrin. The 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. |
| Cofactor | |
| History | |
| Reactions | ((1->4)-alpha-D-glucosyl)(n) + phosphate = ((1->4)-alpha-D-glucosyl)(n-1) + alpha-D-glucose 1-phosphate. |
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