1X9H

Crystal structure of phosphoglucose/phosphomannose isomerase from Pyrobaculum aerophilum in complex with fructose 6-phosphate

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	d1x9ha_	Alpha and beta proteins (a/b)	SIS domain	SIS domain	double-SIS domain	Glucose-6-phosphate isomerase, conjectural	(Pyrobaculum aerophilum ) [TaxId: 13773 ],	SCOPe (2.08)
B	d1x9hb_	Alpha and beta proteins (a/b)	SIS domain	SIS domain	double-SIS domain	Glucose-6-phosphate isomerase, conjectural	(Pyrobaculum aerophilum ) [TaxId: 13773 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	SIS domain/Ribosomal protein S2-like	8052802	3001397	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	SIS domain/Ribosomal protein S2-like	8043798	3001397	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	SIS domain/Ribosomal protein S2-like	8052802	3001397	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	SIS domain/Ribosomal protein S2-like	8043798	3001397	SCOP2B (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	bact-PGI_C	e1x9hA1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Ribosomal protein S2/SIS domain (From Topology)	T: Ribosomal protein S2/SIS domain	F: bact-PGI_C	ECOD (1.6)
A	SIS	e1x9hA2	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Ribosomal protein S2/SIS domain (From Topology)	T: Ribosomal protein S2/SIS domain	F: SIS	ECOD (1.6)
B	bact-PGI_C	e1x9hB1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Ribosomal protein S2/SIS domain (From Topology)	T: Ribosomal protein S2/SIS domain	F: bact-PGI_C	ECOD (1.6)
B	SIS	e1x9hB2	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Ribosomal protein S2/SIS domain (From Topology)	T: Ribosomal protein S2/SIS domain	F: SIS	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.10490	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Glucose-6-phosphate isomerase like protein	CATH (4.3.0)
B	3.40.50.10490	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Glucose-6-phosphate isomerase like protein	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF10432	Bacterial phospho-glucose isomerase C-terminal SIS domain (bact-PGI_C)	Bacterial phospho-glucose isomerase C-terminal SIS domain	This is the C-terminal SIS domain of a bacterial phospho-glucose isomerase EC:5.3.1.9 protein which is similar to eukaryote homologues to the extent that the sequence includes the cluster of threonines and serines that forms the sugar phosphate-bindi ...	This is the C-terminal SIS domain of a bacterial phospho-glucose isomerase EC:5.3.1.9 protein which is similar to eukaryote homologues to the extent that the sequence includes the cluster of threonines and serines that forms the sugar phosphate-binding site in conventional PGI. This domain contributes a good proportion of the active catalytic site residues. This PGI uses the same catalytic mechanisms for both glucose ring-opening and isomerisation for the interconversion of glucose 6-phosphate to fructose 6-phosphate [1]. It is associated with family SIS, Pfam:PF01380.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	glucose-6-phosphate isomerase	isomerase activity intramolecular oxidoreductase activity, interconverting aldoses and ketoses intramolecular oxidoreductase activity mannose-6-phosphate isomerase activity catalytic activity glucose-6-phosphate isomerase activity binding carbohydrate derivative binding	carbohydrate metabolic process primary metabolic process metabolic process carbohydrate derivative metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR046348	SIS domain superfamily	Homologous Superfamily
A, B	IPR035484	Bifunctional phosphoglucose/phosphomannose isomerase, SIS domain 1	Domain
A, B	IPR019490	Bifunctional glucose-6-phosphate/mannose-6-phosphate isomerase, C-terminal	Domain
A, B	IPR001347	SIS domain	Domain

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
A, B	mannose-6-phosphate isomerase M-CSA #736	Several aerobic crenarcheaons, including Pyrobaculum aerophilum, contain an isomerase that converts both glucose-6-phosphate and mannose-6-phosphate (G6P and M6P, which are C2 epimers) into fructose-6-phosphate. Most organisms contain only highly specific phosphoglucose and phosphomannose isomerases (PGIs and PMIs), which only accept either glucose or mannose as a substrate. These dual specificity isomerases share very low sequence identity with 'conventional' PGIs or PMIs, but structure is conserved, especially at the active site, supporting a common mechanism. They belong to the larger PGI superfamily.	Defined by 4 residues: ARG:A-135GLU:A-203LYS:A-298HIS:B-219 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 5.3.1.9 (PDB Primary Data) Search M-CSA Motif + EC 5.3.1.9 EC: 5.3.1.8 (PDB Primary Data) Search M-CSA Motif + EC 5.3.1.8

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.