1QNJ

THE STRUCTURE OF NATIVE PORCINE PANCREATIC ELASTASE AT ATOMIC RESOLUTION (1.1 A)

• PDB DOI: https://doi.org/10.2210/pdb1QNJ/pdb

• Classification: HYDROLASE (SERINE PROTEASE)
• Organism(s): Sus scrofa
• Mutation(s): No 


• Deposited: 1999-10-15 Released: 2000-03-31 
• Deposition Author(s): Wurtele, M., Hahn, M., Hilpert, K., Hohne, W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.10 Å
• R-Value Free: 0.165 
• R-Value Observed: 0.127 

Starting Model: experimental

Literature

Atomic Resolution Structure of Native Porcine Pancreatic Elastase at 1.1 A

Wurtele, M., Hahn, M., Hilpert, K., Hohne, W.

(2000) Acta Crystallogr D Biol Crystallogr 56: 520

• PubMed: 10739939 
• DOI: https://doi.org/10.1107/s0907444900000299
• Primary Citation of Related Structures:  
  1QNJ


• PubMed Abstract: 
  

  A data set from the serine protease porcine pancreatic elastase was collected at atomic resolution (1.1 A) with synchrotron radiation. The improved resolution allows the determination of atom positions with high accuracy, as well as the localization of H atoms. Three residues could be modelled in alternative positions. The catalytic triad of elastase consists of His57, Asp102 and Ser195. The His57 N(delta1) H atom was located at a distance of 0.82 A from the N(delta1) atom. The distance between His57 N(delta1) and Asp102 O(delta2) is 2.70 +/- 0.04 A, thus indicating normal hydrogen-bonding geometry. Additional H atoms at His57 N(varepsilon2) and Ser195 O(gamma) could not be identified in the F(o) - F(c) density maps.

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Organizational Affiliation: 

Institut für Biochemie der Charité, Humboldt-Universität zu Berlin, Monbijoustrasse 2, D-10117 Berlin, Germany.

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 26.14 kDa 
• Atom Count: 2,206 
• Modelled Residue Count: 240 
• Deposited Residue Count: 240 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ELASTASE	A	240	Sus scrofa	Mutation(s): 0  EC: 3.4.21.36
UniProt
Find proteins for P00772 (Sus scrofa) Explore P00772  Go to UniProtKB:  P00772

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C [auth A], D [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
NA	B [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.10 Å
• R-Value Free: 0.165 
• R-Value Observed: 0.127 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 49.91	α = 90
b = 57.82	β = 90
c = 74.27	γ = 90

Software Package:

Software Name	Purpose
SHELXL-97	refinement
DENZO	data reduction
SCALEPACK	data scaling
SHELXL-97	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2000-03-31 
Deposition Author(s): Wurtele, M., Hahn, M., Hilpert, K., Hohne, W.

Revision History  

• Version 1.0: 2000-03-31
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2019-05-08
  Changes: Data collection, Experimental preparation, Other
• Version 1.4: 2019-05-22
  Changes: Data collection, Refinement description
• Version 1.5: 2019-07-24
  Changes: Data collection
• Version 1.6: 2023-12-13
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description
• Version 1.7: 2024-11-13
  Changes: Structure summary