Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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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: 60920.01 
• Atom Count: 4182 
• Residue Count: 546 
• Unique protein chains: 1

4H2G

Human ecto-5'-nucleotidase (CD73): crystal form II (open) in complex with adenosine

• DOI: 10.2210/pdb4H2G/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): 7 


• Deposited: 2012-09-12 Released: 2012-11-28 
• Deposition Author(s): Straeter, N., Knapp, K.M., Zebisch, M., Pippel, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 0.180 
• R-Value Work: 0.129 

Literature

Crystal Structure of the Human Ecto-5'-Nucleotidase (CD73): Insights into the Regulation of Purinergic Signaling.

Knapp, K., Zebisch, M., Pippel, J., El-Tayeb, A., Muller, C.E., Strater, N.

(2012) Structure 20: 2161-2173

• PubMed: 23142347 
• DOI: 10.1016/j.str.2012.10.001
• Primary Citation of Related Structures:  
  4H2I, 4H2F, 4H2B, 4H1Y


• PubMed Abstract: 
  

In vertebrates ecto-5'-nucleotidase (e5NT) catalyzes the hydrolysis of extracellular AMP to adenosine and represents the major control point for extracellular adenosine levels. Due to its pivotal role for activation of P1 adenosine receptors, e5NT has emerged as an appealing drug target for treatment of inflammation, chronic pain, hypoxia, and cancer. Crystal structures of the dimeric human e5NT reveal an extensive 114° conformational switch between the open and closed forms of the enzyme. The dimerization interface is formed by the C-terminal domains and exhibits interchain motions of up to 13°. Complex structures with adenosine and AMPCP indicate that structural control of the domain movement determines the selectivity for monophosphate nucleotides. Binding modes of nucleotide-derived and flavonoid-based compounds complexed to the C-terminal domain in the open form reveal an additional binding pocket of ∼210 Å(3) that might be explored to design more potent inhibitors.

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Organizational Affiliation: 

Institute of Bioanalytical Chemistry, Center for Biotechnology and Biomedicine, University of Leipzig, Deutscher Platz 5, 04103 Leipzig, Germany.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
5'-nucleotidase	A	546	Homo sapiens	Mutation(s): 7  Gene Names: NT5E (NT5, NTE) EC: 3.1.3.5
Find proteins for P21589 (Homo sapiens) Go to Gene View: NT5E Go to UniProtKB:  P21589

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ZN	A	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
CL	A	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
CA	A	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N
ADN	A	ADENOSINE C10 H13 N5 O4 OIRDTQYFTABQOQ-KQYNXXCUSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 0.180 
• R-Value Work: 0.129 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 67.100	α = 90.00
b = 131.000	β = 90.00
c = 66.010	γ = 90.00

Software Package:

Software Name	Purpose
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-09-12 
• Released Date: 2012-11-28 
• Deposition Author(s): Straeter, N., Knapp, K.M., Zebisch, M., Pippel, J.

Revision History 

• Version 1.0: 2012-11-28
  Type: Initial release
• Version 1.1: 2012-12-12
  Type: Structure summary
• Version 1.2: 2012-12-26
  Type: Database references