1BTU

PORCINE PANCREATIC ELASTASE COMPLEXED WITH (3S, 4R)-1-TOLUENESULPHONYL-3-ETHYL-AZETIDIN-2-ONE-4-CARBOXYLIC ACID


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Inhibition of elastase by N-sulfonylaryl beta-lactams: anatomy of a stable acyl-enzyme complex.

Wilmouth, R.C.Westwood, N.J.Anderson, K.Brownlee, W.Claridge, T.D.Clifton, I.J.Pritchard, G.J.Aplin, R.T.Schofield, C.J.

(1998) Biochemistry 37: 17506-17513

  • DOI: 10.1021/bi9816249
  • Also Cited By: 1E34, 1E35, 1E36, 1E37, 1E38, 1QNJ

  • PubMed Abstract: 
  • beta-Lactam inhibitors of transpeptidase enzymes involved in cell wall biosynthesis remain among the most important therapeutic agents in clinical use. beta-Lactams have more recently been developed as inhibitors of serine proteases including elastas ...

    beta-Lactam inhibitors of transpeptidase enzymes involved in cell wall biosynthesis remain among the most important therapeutic agents in clinical use. beta-Lactams have more recently been developed as inhibitors of serine proteases including elastase. All therapeutically useful beta-lactam inhibitors operate via mechanisms resulting in the formation of hydrolytically stable acyl-enzyme complexes. Presently, it is difficult to predict which beta-lactams will form stable acyl-enzyme complexes with serine enzymes. Further, the factors that result in the seemingly special nature of beta-lactams versus other acylating agents are unclear-if indeed they exist. Here we present the 1.6 A resolution crystal structure of a stable acyl-enzyme complex formed between porcine pancreatic elastase and a representative monocyclic beta-lactam, which forms a simple acyl-enzyme. The structure shows that the ester carbonyl is not located within the oxyanion hole and the "hydrolytic" water is displaced. Combined with additional kinetic and mass spectrometric data, the structure allows the rationalization of the low degree of hydrolytic lability observed for the beta-lactam-derived acyl-enzyme complex.


    Related Citations: 
    • Structure of Native Porcine Pancreatic Elastase at 1.65 A Resolution
      Meyer, E.,Cole, G.,Radhakrishnan, R.,Epp, O.
      (1988) Acta Crystallogr.,Sect.B 44: 26
    • Monocyclic Beta-Lactam Inhibitors of Human Leukocyte Elastase
      Firestone, R.A.,Barker, P.L.,Pisano, J.M.,Ashe, B.M.,Dahlgren, M.E.
      (1990) Tetrahedron 46: 2255
    • Specificity, Stability, and Potency of Monocyclic Beta-Lactam Inhibitors of Human Leucocyte Elastase
      Knight, W.B.,Green, B.G.,Chabin, R.M.,Gale, P.,Maycock, A.L.,Weston, H.,Kuo, D.W.,Westler, W.M.,Dorn, C.P.,Finke, P.E.,Hagmann, W.K.,Hale, J.J.,Liesch, J.,Maccoss, M.,Navia, M.A.,Shah, S.K.,Underwood, D.,Doherty, J.B.
      (1992) Biochemistry 31: 8160
    • Structure of a Specific Acyl-Enzyme Complex Formed between Beta-Casomorphin-7 and Porcine Pancreatic Elastase
      Wilmouth, R.C.,Clifton, I.J.,Robinson, C.V.,Roach, P.L.,Aplin, R.T.,Westwood, N.J.,Hajdu, J.,Schofield, C.J.
      (1997) Nat.Struct.Mol.Biol. 4: 456
    • Inhibition of Human Serine Proteases by Substituted 2-Azetidinones
      Knight, W.B.,Chabin, R.,Green, B.
      (1992) Arch.Biochem.Biophys. 296: 704


    Organizational Affiliation

    The Oxford Centre for Molecular Sciences, The Dyson Perrins Laboratory, Oxford, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
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
2BL
Query on 2BL

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Download CCD File 
A
(3R)-3-ethyl-N-[(4-methylphenyl)sulfonyl]-L-aspartic acid
C13 H17 N O6 S
KPHLTCNXHCHMOW-MNOVXSKESA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.220 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 50.570α = 90.00
b = 57.930β = 90.00
c = 74.720γ = 90.00
Software Package:
Software NamePurpose
SHELXL-97model building
SHELXL-97refinement
X-PLORrefinement
X-PLORphasing
SCALEPACKdata scaling
X-PLORmodel building
DENZOdata reduction
SHELXL-97phasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-02-16
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance