1EZM

THREE-DIMENSIONAL STRUCTURE OF THE ELASTASE OF PSEUDOMONAS AERUGINOSA AT 1.5 ANGSTROMS RESOLUTION

• PDB DOI: https://doi.org/10.2210/pdb1EZM/pdb

• Classification: HYDROLASE
• Mutation(s): No 


• Deposited: 1992-01-13 Released: 1993-10-31 
• Deposition Author(s): Thayer, M.M., Flaherty, K.M., Mckay, D.B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Work: 0.176 
• R-Value Observed: 0.176 

Literature

Three-dimensional structure of the elastase of Pseudomonas aeruginosa at 1.5-A resolution.

Thayer, M.M., Flaherty, K.M., McKay, D.B.

(1991) J Biol Chem 266: 2864-2871

• PubMed: 1899664 
• DOI: https://doi.org/10.2210/pdb1ezm/pdb
• Primary Citation of Related Structures:  
  1EZM


• PubMed Abstract: 
  

  Pseudomonas aeruginosa elastase (PAE) is a zinc metalloprotease with 301 amino acids. We have crystallized and solved the three-dimensional structure of PAE, using data to 1.5-A resolution, and have refined the native molecular structure to R = 0.188. The overall tertiary structure of the PAE molecule is similar to that of thermolysin, with which it shares 28% amino acid sequence identity. Nearly all of the active site residues that might potentially interact with substrates are identical in the two proteins. However, the active site cleft is significantly more "open" in PAE than in thermolysin.

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Organizational Affiliation: 

Department of Chemistry and Biochemistry, University of Colorado, Boulder 80309.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 33.28 kDa 
• Atom Count: 2,444 
• Modelled Residue Count: 298 
• Deposited Residue Count: 301 
• Unique protein chains: 1

Macromolecules

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	B [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
CA	C [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Work: 0.176 
• R-Value Observed: 0.176 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 41.9	α = 90
b = 90	β = 113.8
c = 40.8	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1993-10-31 
Deposition Author(s): Thayer, M.M., Flaherty, K.M., Mckay, D.B.

Revision History  

• Version 1.0: 1993-10-31
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-06-05
  Changes: Data collection, Database references, Derived calculations, Other
• Version 1.4: 2024-10-23
  Changes: Structure summary