Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 171.83 kDa 
• Atom Count: 13699 
• Residue Count: 1507 
• Unique protein chains: 1

1H54

Maltose phosphorylase from Lactobacillus brevis

• DOI: 10.2210/pdb1H54/pdb

• Classification: HYDROLASE
• Organism(s): Lactobacillus brevis
• Mutation(s): No 


• Deposited: 2001-05-18 Released: 2001-09-05 
• Deposition Author(s): Van Tilbeurgh, H., Egloff, M.-P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Free: 0.225 
• R-Value Work: 0.186 
• R-Value Observed: 0.186 

Literature

Crystal Structure of Maltose Phosphorylase from Lactobacillus Brevis: Unexpected Evolutionary Relationship with Glucoamylases.

Egloff, M.-P., Uppenberg, J., Haalck, L., Van Tilbeurgh, H.

(2001) Structure 9: 689

• PubMed: 11587643 
• DOI: 10.1016/s0969-2126(01)00626-8
• Primary Citation of Related Structures:  
  1H54


• PubMed Abstract: 
  

Maltose phosphorylase (MP) is a dimeric enzyme that catalyzes the conversion of maltose and inorganic phosphate into beta-D-glucose-1-phosphate and glucose without requiring any cofactors, such as pyridoxal phosphate. The enzyme is part of operons that are involved in maltose/malto-oligosaccharide metabolism. Maltose phosphorylases have been classified in family 65 of the glycoside hydrolases. No structure is available for any member of this family.

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Related Citations: 

• Maltose Phosphorylase from Lactobacillus Brevis: Purification, Characterization, and Application in a Biosensor for Ortho-Phosphate.
  Huwel, S., Haalck, L., Conrath, N., Spener, F.
  (1997) Enzyme Microb Technol 21: 413

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Organizational Affiliation: 

Architecture et Fonction des Macromolécules Biologiques, Centre National de la Recherche Scientifique, Unite Mixte de Recherche 6098, Université d'Aix-Marseille, I et II, Case 925, 13288, Marseille, France.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MALTOSE PHOSPHORYLASE	A, B	754	Lactobacillus brevis	Mutation(s): 0  EC: 2.4.1.8
Find proteins for Q7SIE1 (Lactobacillus brevis) Explore Q7SIE1  Go to UniProtKB:  Q7SIE1

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PO4	B	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K
K	A, B	POTASSIUM ION K NPYPAHLBTDXSSS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Free: 0.225 
• R-Value Work: 0.186 
• R-Value Observed: 0.186 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 83.75	α = 90
b = 102.5	β = 111.3
c = 114	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-05-18 
• Released Date: 2001-09-05 
Deposition Author(s): Van Tilbeurgh, H., Egloff, M.-P.

Revision History 

• Version 1.0: 2001-09-05
  Type: Initial release
  
• Version 1.1: 2012-06-13
  Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Other, Refinement description, Version format compliance