Alpha amylase catalytic domain found in sucrose phosphorylase (also called sucrose glucosyltransferase, disaccharide glucosyltransferase, and sucrose-phosphate alpha-D glucosyltransferase). Sucrose phosphorylase is a bacterial enzyme that catalyzes the phosphorolysis of sucrose to yield glucose-1-phosphate and fructose. These enzymes do not have the conserved calcium ion present in other alpha amylase family enzymes. The Alpha-amylase family comprises the largest family of glycoside hydrolases (GH), with the majority of enzymes acting on starch, glycogen, and related oligo- and polysaccharides. These proteins catalyze the transformation of alpha-1,4 and alpha-1,6 glucosidic linkages with retention of the anomeric center. The protein is described as having 3 domains: A, B, C. A is a (beta/alpha) 8-barrel; B is a loop between the beta 3 strand and alpha 3 helix of A; C is the C-terminal extension characterized by a Greek key. The majority of the enzymes have an active site cleft found between domains A and B where a triad of catalytic residues (Asp, Glu and Asp) performs catalysis. Other members of this family have lost the catalytic activity as in the case of the human 4F2hc, or only have 2 residues that serve as the catalytic nucleophile and the acid/base, such as Thermus A4 beta-galactosidase with 2 Glu residues (GH42) and human alpha-galactosidase with 2 Asp residues (GH31). The family members are quite extensive and include: alpha amylase, maltosyltransferase, cyclodextrin glycotransferase, maltogenic amylase, neopullulanase, isoamylase, 1,4-alpha-D-glucan maltotetrahydrolase, 4-alpha-glucotransferase, oligo-1,6-glucosidase, amylosucrase, sucrose phosphorylase, and amylomaltase.

Alpha amylase catalytic domain found in sucrose phosphorylase-like proteins (also called sucrose glucosyltransferase, disaccharide glucosyltransferase, and sucrose-phosphate alpha-D glucosyltransferase). Sucrose phosphorylase is a bacterial enzyme that catalyzes the phosphorolysis of sucrose to yield glucose-1-phosphate and fructose. These enzymes do not have the conserved calcium ion present in other alpha amylase family enzymes. The Alpha-amylase family comprises the largest family of glycoside hydrolases (GH), with the majority of enzymes acting on starch, glycogen, and related oligo- and polysaccharides. These proteins catalyze the transformation of alpha-1,4 and alpha-1,6 glucosidic linkages with retention of the anomeric center. The protein is described as having 3 domains: A, B, C. A is a (beta/alpha) 8-barrel; B is a loop between the beta 3 strand and alpha 3 helix of A; C is the C-terminal extension characterized by a Greek key. The majority of the enzymes have an active site cleft found between domains A and B where a triad of catalytic residues (Asp, Glu and Asp) performs catalysis. Other members of this family have lost the catalytic activity as in the case of the human 4F2hc or only have 2 residues that serve as the catalytic nucleophile and the acid/base, such as Thermus A4 beta-galactosidase with 2 Glu residues (GH42) and human alpha-galactosidase with 2 Asp residues (GH31). The family members are quite extensive and include: alpha amylase, maltosyltransferase, cyclodextrin glycotransferase, maltogenic amylase, neopullulanase, isoamylase, 1,4-alpha-D-glucan maltotetrahydrolase, 4-alpha-glucotransferase, oligo-1,6-glucosidase, amylosucrase, sucrose phosphorylase, and amylomaltase.

Alpha amylase catalytic domain found in sucrose phosphorylase (also called sucrose glucosyltransferase, disaccharide glucosyltransferase, and sucrose-phosphate alpha-D glucosyltransferase). Sucrose phosphorylase is a bacterial enzyme that catalyzes the phosphorolysis of sucrose to yield glucose-1-phosphate and fructose. These enzymes do not have the conserved calcium ion present in other alpha amylase family enzymes. The Alpha-amylase family comprises the largest family of glycoside hydrolases (GH), with the majority of enzymes acting on starch, glycogen, and related oligo- and polysaccharides. These proteins catalyze the transformation of alpha-1,4 and alpha-1,6 glucosidic linkages with retention of the anomeric center. The protein is described as having 3 domains: A, B, C. A is a (beta/alpha) 8-barrel; B is a loop between the beta 3 strand and alpha 3 helix of A; C is the C-terminal extension characterized by a Greek key. The majority of the enzymes have an active site cleft found between domains A and B where a triad of catalytic residues (Asp, Glu and Asp) performs catalysis. Other members of this family have lost the catalytic activity as in the case of the human 4F2hc, or only have 2 residues that serve as the catalytic nucleophile and the acid/base, such as Thermus A4 beta-galactosidase with 2 Glu residues (GH42) and human alpha-galactosidase with 2 Asp residues (GH31). The family members are quite extensive and include: alpha amylase, maltosyltransferase, cyclodextrin glycotransferase, maltogenic amylase, neopullulanase, isoamylase, 1,4-alpha-D-glucan maltotetrahydrolase, 4-alpha-glucotransferase, oligo-1,6-glucosidase, amylosucrase, sucrose phosphorylase, and amylomaltase.

sucrose phosphorylase. In the forward direction, this enzyme uses phosphate to cleave sucrose into D-fructose + alpha-D-glucose 1-phosphate. Characterized representatives from Streptococcus mutans and Bifidobacterium adolescentis represent well-separated branches of a molecular phylogenetic tree. In S. mutans, the region including this gene has been associated with neighboring transporter genes and multiple sugar metabolism.

sucrose phosphorylase; Provisional

Crystalstructure of sucrose 6F-phosphate phosphorylase from Thermoanaerobacter thermosaccharolyticum [Thermoanaerobacterium thermosaccharolyticum DSM 571],6S9V_B Crystal structure of sucrose 6F-phosphate phosphorylase from Thermoanaerobacter thermosaccharolyticum [Thermoanaerobacterium thermosaccharolyticum DSM 571]

AmylosucraseFrom Neisseria Polysaccharea [Neisseria polysaccharea],1JG9_A Crystal Structure of Amylosucrase from Neisseria polysaccharea in Complex with D-glucose [Neisseria polysaccharea],1MW1_A Amylosucrase soaked with 14mM sucrose. [Neisseria polysaccharea],1MW2_A Amylosucrase soaked with 100mM sucrose [Neisseria polysaccharea],1MW3_A Amylosucrase soaked with 1M sucrose [Neisseria polysaccharea]

Crystalstructure of amylosucrase from Neisseria polysaccharea in complex with turanose [Neisseria polysaccharea]

Trehalosesynthase from Thermobaculum terrenum [Thermobaculum terrenum ATCC BAA-798]

SucrosePhosphorylase from Bifidobacterium adolescentis [Bifidobacterium adolescentis],1R7A_B Sucrose Phosphorylase from Bifidobacterium adolescentis [Bifidobacterium adolescentis]

Glucosylglycerate phosphorylase OS=Meiothermus silvanus (strain ATCC 700542 / DSM 9946 / VI-R2) OX=526227 GN=Mesil_0665 PE=1 SV=1

Glucosylglycerate phosphorylase OS=Escherichia coli (strain K12) OX=83333 GN=ycjM PE=1 SV=2

Glucosylglycerate phosphorylase OS=Spirochaeta thermophila (strain ATCC 700085 / DSM 6578 / Z-1203) OX=869211 GN=Spith_0877 PE=1 SV=1

Sucrose phosphorylase OS=Streptococcus mutans serotype c (strain ATCC 700610 / UA159) OX=210007 GN=gtfA PE=1 SV=4

Glucosylglycerol phosphorylase OS=Marinobacter adhaerens (strain DSM 23420 / HP15) OX=225937 GN=gtfA PE=1 SV=1