1M53

CRYSTAL STRUCTURE OF ISOMALTULOSE SYNTHASE (PALI) FROM KLEBSIELLA SP. LX3

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Structure Motif: Primary M-CSA Annotation

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 sp. LX3 ) [TaxId: 167956 ],	SCOPe (2.08)
A	d1m53a2	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	Amylase, catalytic domain	Isomaltulose synthase PalI	(Klebsiella sp. LX3 ) [TaxId: 167956 ],	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	Malt_amylase_C_2	e1m53A1	A: beta sandwiches	X: Glycosyl hydrolase domain-like	H: Glycosyl hydrolase domain (From Topology)	T: Glycosyl hydrolase domain	F: Malt_amylase_C_2	ECOD (1.6)
A	Alpha-amylase	e1m53A2	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: Alpha-amylase	ECOD (1.6)

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)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00128	Alpha amylase, catalytic domain (Alpha-amylase)	Alpha amylase, catalytic domain	Alpha amylase is classified as family 13 of the glycosyl hydrolases. The structure is an 8 stranded alpha/beta barrel containing the active site, interrupted by a ~70 a.a. calcium-binding domain protruding between beta strand 3 and alpha helix 3, a ...	Alpha amylase is classified as family 13 of the glycosyl hydrolases. The structure is an 8 stranded alpha/beta barrel containing the active site, interrupted by a ~70 a.a. calcium-binding domain protruding between beta strand 3 and alpha helix 3, and a carboxyl-terminal Greek key beta-barrel domain.	Domain
A	PF16657	Maltogenic Amylase, C-terminal domain (Malt_amylase_C)	Maltogenic Amylase, C-terminal domain	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Isomaltulose Synthase	hydrolase activity, acting on glycosyl bonds amylase activity alpha-amylase activity hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity catalytic activity	carbohydrate metabolic process catabolic process oligosaccharide catabolic process oligosaccharide metabolic process carbohydrate catabolic process primary metabolic process metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR006047	Glycosyl hydrolase, family 13, catalytic domain	Domain
A	IPR045857	Oligo-1,6-glucosidase, domain 2	Homologous Superfamily
A	IPR032091	Maltogenic amylase-like, C-terminal	Domain
A	IPR017853	Glycoside hydrolase superfamily	Homologous Superfamily
A	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
A	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] \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 5.4.99.11 (PDB Primary Data) Search M-CSA Motif + EC 5.4.99.11

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.