1ELF

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: 1.7 Å
  • R-Value Work: 0.180 

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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

  • 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: 
    • 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
    • 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
    • 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
    • Inhibition of Proteases with Enkephalin-Analogue Inhibitors
      Demuth, H.-U.,Silberring, J.,Nyberg, F.
      (1991) J.Enzyme Inhib. 4: 289
    • N-O Bond Fission as the Rate-Determining Step in the Aqueous Conversion of N-Peptidyl-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


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PORCINE PANCREATIC ELASTASE
A
240Sus scrofaGene Names: CELA1 (ELA1)
EC: 3.4.21.36
Find proteins for P00772 (Sus scrofa)
Go to Gene View: CELA1
Go to UniProtKB:  P00772
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CA
Query on CA

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Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
BAF
Query on BAF

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Download CCD File 
A
(TERT-BUTYLOXYCARBONYL)-ALANYL-AMINO ETHYL-FORMAMIDE
C11 H21 N3 O4
MNUWNIQGBRBQRE-YUMQZZPRSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Work: 0.180 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 52.270α = 90.00
b = 58.090β = 90.00
c = 75.330γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORphasing
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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