4EST | pdb_00004est

CRYSTAL STRUCTURE OF THE COVALENT COMPLEX FORMED BY A PEPTIDYL ALPHA,ALPHA-DIFLUORO-BETA-KETO AMIDE WITH PORCINE PANCREATIC ELASTASE AT 1.78-ANGSTROMS RESOLUTION

• PDB DOI: https://doi.org/10.2210/pdb4EST/pdb

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


• Deposited: 1989-05-15 Released: 1992-04-15 
• Deposition Author(s): Takahashi, L.H., Radhakrishnan, R., Rosenfieldjunior, R.E., Meyerjunior, E.F., Trainor, D.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.78 Å
• R-Value Work: 
  0.160 (Depositor), 0.158 (DCC) 

Literature

Crystal Structure of the Covalent Complex Formed by a Peptidyl Alpha,Alpha-Difluoro-Beta-Keto Amide with Porcine Pancreatic Elastase at 1.78-Angstroms Resolution

Takahashi, L.H., Radhakrishnan, R., Rosenfieldjunior, R.E., Meyerjunior, E.F., Trainor, D.A.

(1989) J Am Chem Soc 111: 3368

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 26.64 kDa 
• Atom Count: 2,020 
• Modeled Residue Count: 246 
• Deposited Residue Count: 246 
• 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
INHIBITOR ACE-ALA-PRO-VAI-DIFLUORO-N-PHENYLETHYLACETAMIDE	B [auth I]	6	N/A	Mutation(s): 0

Small Molecules

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

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
VAI	B [auth I]	PEPTIDE-LIKE	C5 H13 N O2		VAL

Biologically Interesting Molecules (External Reference) 

1 Unique

Entity ID: 2
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_000236	B [auth I]	N-acetyl-L-alanyl-N-{(1S)-3,3-difluoro-1-(1-methylethyl)-2,4-dioxo-4-[(2-phenylethyl)amino]butyl}-L-prolinamide	Peptide-like / Inhibitor

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.78 Å
• R-Value Work:  0.160 (Depositor), 0.158 (DCC) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.24	α = 90
b = 58.17	β = 90
c = 75.54	γ = 90

Software Package:

Software Name	Purpose
EREF	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 1992-04-15 
Deposition Author(s): Takahashi, L.H., Radhakrishnan, R., Rosenfieldjunior, R.E., Meyerjunior, E.F., Trainor, D.A.

Revision History  

• Version 1.0: 1992-04-15
  Type: Initial release
  
• Version 1.1: 2008-03-10
  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: 2012-12-12
  Changes: Other
• Version 1.4: 2013-09-18
  Changes: Structure summary
• Version 2.0: 2018-10-03
  Changes: Data collection, Polymer sequence
• Version 3.0: 2024-07-10
  Changes: Data collection, Database references, Derived calculations, Polymer sequence
• Version 3.1: 2024-10-09
  Changes: Structure summary