1ELG

NATURE OF THE INACTIVATION OF ELASTASE BY N-PEPTIDYL-O-AROYL HYDROXYLAMINE AS A FUNCTION OF PH


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Work: 0.170 
  • R-Value Observed: 0.170 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Nature of the inactivation of elastase by N-peptidyl-O-aroyl hydroxylamine as a function of pH.

Ding, X.Rasmussen, B.F.Demuth, H.U.Ringe, D.Steinmetz, A.C.

(1995) Biochemistry 34: 7749-7756

  • Primary Citation of Related Structures:  
    1ELG, 1ELF

  • PubMed Abstract: 
  • The mechanism of inactivation of porcine pancreatic elastase (PPE) by N-peptidyl-O-aroylhydroxylamine was studied by X-ray crystallography. The inactivator forms a stable complex with the enzyme by means of a covalent attachment to the active site Se ...

    The mechanism of inactivation of porcine pancreatic elastase (PPE) by N-peptidyl-O-aroylhydroxylamine was studied by X-ray crystallography. The inactivator forms a stable complex with the enzyme by means of a covalent attachment to the active site Ser 203(195) O gamma. The nature of the complex is, however, different depending on the pH at which the inactivation reaction occurs. At pH 5, the complex formed is a hydroxylamine derivative of Ser 203(195) in which the O gamma of serine is the oxygen of the hydroxylamine derivative. At pH 7.5, the complex formed is a carbamate derivative at Ser 203(195) O gamma. In both types of complexes, the inactivator binds in the S' subsites of the enzyme instead of forming the usual antiparallel beta-sheet with the S subsites. The implication for the mechanism of inactivation at different pHs is discussed.


    Related Citations: 
    • Direct Structural Observation of an Acyl-Enzyme Intermediate in the Hydrolysis of an Ester Substrate by Elastase
      Ding, X., Rasmussen, B.F., Petsko, G.A., Ringe, D.
      (1994) Biochemistry 33: 9285
    • Inhibition of Proteases with Enkephalin-Analogue Inhibitors
      Demuth, H.-U., Silberring, J., Nyberg, F.
      (1991) J Enzyme Inhib 4: 289
    • Competing Redox and Inactivation Processes in the Inhibition of Cysteine Proteinases by Peptidyl O-Acylhydroxamates. 13C and 15N NMR Evidence for a Novel Sulfenamide Enzyme Adduct
      Robinson, V.J., Coles, P.J., Smith, R.A., Krantz, A.
      (1991) J Am Chem Soc 113: 7760
    • N-O Bond Fission as the Rate-Determining Step in the Aqueous Conversion of N-Peptiyl-O-(P-Nitrobenzoyl)Hydroxylamines to P-Nitrobenzoic Acid and Peptidylhydroxamic Acids
      Demuth, H.-U., Fischer, G., Barth, A., Schowen, R.L.
      (1989) J Org Chem 54: 5880
    • Crystal Structure of the Covalent Complex Formed by a Peptidyl Difluoro Keto Amide with Porcine Pancreatic Elastase at 1.78 Angstroms Resolution
      Takahashi, L.H., Radhakrishnan, R., Rosenfield Junior, R.E., Meyer Junior, E.F., Trainor, D.A.
      (1989) J Am Chem Soc 111: 3368

    Organizational Affiliation

    Department of Chemistry, Brandeis University, Waltham, Massachusetts 02254, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PORCINE PANCREATIC ELASTASEA240Sus scrofaMutation(s): 0 
Gene Names: CELA1ELA1
EC: 3.4.21.36
Find proteins for P00772 (Sus scrofa)
Explore P00772 
Go to UniProtKB:  P00772
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BAA
Query on BAA

Download CCD File 
A
(TERT-BUTYLOXYCARBONYL)-ALANYL-ALANYL-AMINE
C11 H21 N3 O4
OAXZAMSRJZWMEV-BQBZGAKWSA-N
 Ligand Interaction
CA
Query on CA

Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Work: 0.170 
  • R-Value Observed: 0.170 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.08α = 90
b = 58.04β = 90
c = 75.18γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-07-10
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance