1NES | pdb_00001nes

STRUCTURE OF THE PRODUCT COMPLEX OF ACETYL-ALA-PRO-ALA WITH PORCINE PANCREATIC ELASTASE AT 1.65 ANGSTROMS RESOLUTION

• PDB DOI: https://doi.org/10.2210/pdb1NES/pdb

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


• Deposited: 1995-07-31 Released: 1996-01-29 
• Deposition Author(s): Meyer Junior, E.F., Radhakrishnan, R., M Cole, G., Presta, L.G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Work: 
  0.184 (Depositor), 0.281 (DCC) 

Literature

Structure of the product complex of acetyl-Ala-Pro-Ala with porcine pancreatic elastase at 1.65 A resolution.

Meyer Jr., E.F., Radhakrishnan, R., Cole, G.M., Presta, L.G.

(1986) J Mol Biology 189: 533-539

• PubMed: 3640831 
• DOI: https://doi.org/10.1016/0022-2836(86)90322-0
• Primary Citation Related Structures: 
  1NES


• PubMed Abstract: 
  

  A single crystal of porcine pancreatic elastase was mounted in a thin-walled capillary and allowed to react with acetyl-Ala-Pro-Ala-paranitroanalide. Diffraction data to 1.65 A resolution were measured and the isomorphous structure was solved from the difference Fourier map. The structure contains two surprises. Two molecules of the product: acetyl-Ala-Pro-Ala molecule are bound in the extended binding site. Both molecules are bound backwards with respect to the established mode of peptide binding.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A2B1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 3-mer - A1B1C1 

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

Macromolecule Content 

• Total Structure Weight: 26.63 kDa 
• Atom Count: 1,998 
• Modeled Residue Count: 248 
• Deposited Residue Count: 248 
• Unique protein chains: 2

Macromolecules

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

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
ACETYL-ALA-PRO-ALA	B [auth I], C [auth J]	4	N/A	Mutation(s): 0

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	E	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
CA	D [auth E]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Work:  0.184 (Depositor), 0.281 (DCC) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.4	α = 90
b = 58.2	β = 90
c = 75.4	γ = 90

Software Package:

Software Name	Purpose
EREF	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 1996-01-29 
Deposition Author(s): Meyer Junior, E.F., Radhakrishnan, R., M Cole, G., Presta, L.G.

Revision History  

• Version 1.0: 1996-01-29
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
• Version 1.3: 2024-06-05
  Changes: Data collection, Database references, Derived calculations, Other
• Version 1.4: 2024-10-30
  Changes: Structure summary