1EST

THE ATOMIC STRUCTURE OF CRYSTALLINE PORCINE PANCREATIC ELASTASE AT 2.5 ANGSTROMS RESOLUTION. COMPARISONS WITH THE STRUCTURE OF ALPHA-CHYMOTRYPSIN

• PDB DOI: https://doi.org/10.2210/pdb1EST/pdb

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


• Deposited: 1976-05-17 Released: 1976-05-27 
• Deposition Author(s): Sawyer, L., Shotton, D.M., Watson, H.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å

Literature

The atomic structure of crystalline porcine pancreatic elastase at 2.5 A resolution: comparisons with the structure of alpha-chymotrypsin.

Sawyer, L., Shotton, D.M., Campbell, J.W., Wendell, P.L., Muirhead, H., Watson, H.C., Diamond, R., Ladner, R.C.

(1978) J Mol Biol 118: 137-208

• PubMed: 628010 
• DOI: https://doi.org/10.1016/0022-2836(78)90412-6
• Primary Citation of Related Structures:  
  1EST

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 26.2 kDa 
• Atom Count: 1,858 
• Modelled Residue Count: 240 
• Deposited Residue Count: 240 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PORCINE PANCREATIC 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
TSU	C [auth A]	PARA-TOLUENE SULFONATE C7 H8 O3 S JOXIMZWYDAKGHI-UHFFFAOYSA-N
SO4	B [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.5	α = 90
b = 58	β = 90
c = 75.5	γ = 90

Structure Validation

Entry History 

Deposition Data

• Released Date: 1976-05-27 
Deposition Author(s): Sawyer, L., Shotton, D.M., Watson, H.C.

Revision History  

• Version 1.0: 1976-05-27
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2011-08-24
  Changes: Non-polymer description
• Version 1.4: 2024-06-05
  Changes: Data collection, Database references, Derived calculations, Other
• Version 1.5: 2024-11-13
  Changes: Structure summary