CRYSTAL STRUCTURE OF ISOMALTULOSE SYNTHASE (PALI) FROM KLEBSIELLA SP. LX3
Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage
| Chains | Domain Info | Class | Fold | Superfamily | Family | Domain | Species | Provenance Source (Version) |
|---|---|---|---|---|---|---|---|---|
| A | d1m53a1 | All beta proteins | Glycosyl hydrolase domain | Glycosyl hydrolase domain | alpha-Amylases, C-terminal beta-sheet domain | Isomaltulose synthase PalI | (Klebsiella variicola ) [TaxId: 244366 ], | SCOPe (2.08) |
| A | d1m53a2 | Alpha and beta proteins (a/b) | TIM beta/alpha-barrel | (Trans)glycosidases | Amylase, catalytic domain | Isomaltulose synthase PalI | (Klebsiella variicola ) [TaxId: 244366 ], | SCOPe (2.08) |
Domain Annotation: SCOP2 Classification SCOP2 Database Homepage
| Chains | Type | Family Name | Domain Identifier | Family Identifier | Provenance Source (Version) |
|---|---|---|---|---|---|
| A | SCOP2 Family | alpha-Amylases, C-terminal beta-sheet domain | 8020301 | 4002636 | SCOP2 (2022-06-29) |
| A | SCOP2 Family | Amylase, catalytic domain | 8020305 | 4003138 | SCOP2 (2022-06-29) |
| A | SCOP2 Superfamily | Glycosyl hydrolase domain-like | 8032681 | 3001528 | SCOP2 (2022-06-29) |
| A | SCOP2 Superfamily | (Trans)glycosidases | 8032685 | 3000313 | SCOP2 (2022-06-29) |
Domain Annotation: ECOD Classification ECOD Database Homepage
| Chains | Family Name | Domain Identifier | Architecture | Possible Homology | Homology | Topology | Family | Provenance Source (Version) |
|---|---|---|---|---|---|---|---|---|
| A | e1m53A1 | A: Glycosyl hydrolase domain-like | X: Glycosyl hydrolase domain | H: Glycosyl hydrolase domain | T: SusG_C | F: | ECOD (20:10:01) | |
| A | e1m53A2 | A: TIM beta/alpha-barrel | X: TIM barrels | H: TIM barrels | T: Alpha-amylase | F: | ECOD (20:10:01) |
Domain Annotation: CATH CATH Database Homepage
| Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
|---|---|---|---|---|---|---|
| A | 3.20.20.80 | Alpha Beta | Alpha-Beta Barrel | TIM Barrel | Glycosidases | CATH (4.3.0) |
| A | 3.90.400.10 | Alpha Beta | Alpha-Beta Complex | Oligo-1,6-glucosidase | domain 2 | CATH (4.3.0) |
| A | 2.60.40.1180 | Mainly Beta | Sandwich | Immunoglobulin-like | Golgi alpha-mannosidase II | CATH (4.3.0) |
Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage
| Chains | Polymer | Molecular Function | Biological Process | Cellular Component |
|---|---|---|---|---|
| Isomaltulose Synthase | - |
InterPro: Protein Family Classification InterPro Database Homepage
| Chains | Accession | Name | Type |
|---|---|---|---|
| IPR056300 | Alpha-amylase SusG-like, C-terminal domain | Domain | |
| IPR045857 | Oligo-1,6-glucosidase, domain 2 | Homologous Superfamily | |
| IPR017853 | Glycoside hydrolase superfamily | Homologous Superfamily | |
| IPR006047 | Glycosyl hydrolase family 13, catalytic domain | Domain | |
| IPR013780 | Glycosyl hydrolase, all-beta | Homologous Superfamily |
Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage
| Chains | Enzyme Name | Description | Catalytic Residues |
|---|---|---|---|
| isomaltulose synthase M-CSA #582 | Isomaltulose synthase (PalI), also known as sucrose isomerase, catalyses the isomerisation of sucrose to produce isomaltulose (alpha-D-glucosylpyranosyl-1,6-D-fructofuranose) and trehalulose (alpha-D-glucosylpyranosyl-1,1-D-fructofuranose) as the main products with residual amounts of glucose and fructose isomaltulose and trehalulose, two functional isomers of sucrose, have been suggested as non-cariogenic alternatives to sucrose and are widely used in health products and the food industry. | Defined by 2 residues: ASP:A-213 [auth A-241]GLU:A-267 [auth A-295] | EC: 5.4.99.11 (PDB Primary Data) |
