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: 1.60 Å
  • R-Value Free: 0.220 
  • R-Value Observed: 0.192 

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
  • Primary Citation of Related Structures:  
    1BTU

  • 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 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 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
    • 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
    • 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
    • Structure of Native Porcine Pancreatic Elastase at 1.65 A Resolution
      Meyer, E., Cole, G., Radhakrishnan, R., Epp, O.
      (1988) Acta Crystallogr B 44: 26

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
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
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
2BL
Query on 2BL

Download CCD File 
A
(3R)-3-ethyl-N-[(4-methylphenyl)sulfonyl]-L-aspartic acid
C13 H17 N O6 S
KPHLTCNXHCHMOW-MNOVXSKESA-N
 Ligand Interaction
SO4
Query on SO4

Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 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: 1.60 Å
  • R-Value Free: 0.220 
  • R-Value Observed: 0.192 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.57α = 90
b = 57.93β = 90
c = 74.72γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SHELXL-97model building
X-PLORmodel building
SHELXL-97refinement
X-PLORrefinement
SHELXL-97phasing
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

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