Carbohydrate phosphorylase. The members of this family catalyze the formation of glucose 1-phosphate from one of the following polyglucoses; glycogen, starch, glucan or maltodextrin.

Glucan phosphorylase [Carbohydrate transport and metabolism].

4-alpha-glucanotransferase; Provisional

4-alpha-glucanotransferase. These enzymes EC:2.4.1.25 transfer a segment of a (1,4)-alpha-D-glucan to a new 4-position in an acceptor, which may be glucose or (1,4)-alpha-D-glucan.

glycogen phosphorylase and similar proteins. This is a family of oligosaccharide phosphorylases. It includes yeast and mammalian glycogen phosphorylases, plant starch/glucan phosphorylase, as well as the maltodextrin phosphorylases of bacteria. The members of this family catalyze the breakdown of oligosaccharides into glucose-1-phosphate units. They are important allosteric enzymes in carbohydrate metabolism. The allosteric control mechanisms of yeast and mammalian members of this family are different from that of bacterial members. The members of this family belong to the GT-B structural superfamily of glycoslytransferases, which have characteristic N- and C-terminal domains each containing a typical Rossmann fold. The two domains have high structural homology despite minimal sequence homology. The large cleft that separates the two domains includes the catalytic center and permits a high degree of flexibility.

Crystalstructure of putative glycogen phosphorylase from Streptococcus mutans [Streptococcus mutans UA159]

ChainA, Alpha-1,4 glucan phosphorylase [Klebsiella pneumoniae subsp. pneumoniae HS11286],7TM7_B Chain B, Alpha-1,4 glucan phosphorylase [Klebsiella pneumoniae subsp. pneumoniae HS11286]

ChainA, Glycogen phosphorylase, muscle form [Homo sapiens]

Phosphorylaserecognition and phosphorolysis of its oligosaccharide substrate: answers to a long outstanding question [Escherichia coli],1E4O_B Phosphorylase recognition and phosphorolysis of its oligosaccharide substrate: answers to a long outstanding question [Escherichia coli],1QM5_A Phosphorylase recognition and phosphorylysis of its oligosaccharide substrate: answers to a long outstanding question [Escherichia coli],1QM5_B Phosphorylase recognition and phosphorylysis of its oligosaccharide substrate: answers to a long outstanding question [Escherichia coli]

Starchphosphorylase: structural studies explain oxyanion-dependent kinetic stability and regulatory control. [Corynebacterium callunae],2C4M_B Starch phosphorylase: structural studies explain oxyanion-dependent kinetic stability and regulatory control. [Corynebacterium callunae],2C4M_C Starch phosphorylase: structural studies explain oxyanion-dependent kinetic stability and regulatory control. [Corynebacterium callunae],2C4M_D Starch phosphorylase: structural studies explain oxyanion-dependent kinetic stability and regulatory control. [Corynebacterium callunae]

Maltodextrin phosphorylase OS=Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4) OX=170187 GN=malP PE=3 SV=2

Glycogen phosphorylase OS=Bacillus subtilis (strain 168) OX=224308 GN=glgP PE=2 SV=1

4-alpha-glucanotransferase OS=Clostridium butyricum OX=1492 GN=malQ PE=1 SV=1

4-alpha-glucanotransferase OS=Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4) OX=170187 GN=malQ PE=3 SV=1

4-alpha-glucanotransferase OS=Streptococcus pneumoniae (strain ATCC BAA-255 / R6) OX=171101 GN=malQ PE=3 SV=1