1ELE

STRUCTURAL ANALYSIS OF THE ACTIVE SITE OF PORCINE PANCREATIC ELASTASE BASED ON THE X-RAY CRYSTAL STRUCTURES OF COMPLEXES WITH TRIFLUOROACETYL-DIPEPTIDE-ANILIDE INHIBITORS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Work: 0.171 
  • R-Value Observed: 0.171 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural analysis of the active site of porcine pancreatic elastase based on the X-ray crystal structures of complexes with trifluoroacetyl-dipeptide-anilide inhibitors.

Mattos, C.Giammona, D.A.Petsko, G.A.Ringe, D.

(1995) Biochemistry 34: 3193-3203

  • DOI: 10.1021/bi00010a008
  • Primary Citation of Related Structures:  
    1ELE, 1ELD

  • PubMed Abstract: 
  • The X-ray crystal structures of two new (trifluoroacetyl)dipeptide p-(trifluoromethyl)anilide (TFA-dipeptide-TFM) inhibitors complexed to porcine pancreatic elastase are presented. TFA-Val-Ala-TFM and TFA-Phe-Ala-TFM both bind to elastase with the TFA group in the S1 subsite, Val or Phe in the S2 subsite, Ala in the S3 subsite, and the TFM group in the S4 subsite ...

    The X-ray crystal structures of two new (trifluoroacetyl)dipeptide p-(trifluoromethyl)anilide (TFA-dipeptide-TFM) inhibitors complexed to porcine pancreatic elastase are presented. TFA-Val-Ala-TFM and TFA-Phe-Ala-TFM both bind to elastase with the TFA group in the S1 subsite, Val or Phe in the S2 subsite, Ala in the S3 subsite, and the TFM group in the S4 subsite. Five other TFA-dipeptide-anilide/elastase crystal structures are available (two TFA-X-Ala-p-(trifluoromethyl)anilide, X = Lys, Leu, and three TFA-Lys-X-p-isopropylanilide, X = Pro, Leu, Phe). The four inhibitors with the trifluoromethyl substituent on the anilide ring bind in a single mode to elastase, whereas superposition of the three inhibitors with the isopropyl substituent on the anilide ring show three different modes of binding to the protein [Mattos, C., et al. (1994) Nature Struct. Biol. 1, 55-58]. The seven structures are taken together in a detailed analysis of the active site of porcine pancreatic elastase. The inhibition constants for the inhibitors are used in combination with the crystal structures to understand the specificity of the different elastase subsites.


    Related Citations: 
    • Analogous Inhibitors of Elastase Do not Always Bind Analogously
      Mattos, C., Rasmussen, B., Ding, X., Petsko, G.A., Ringe, D.
      (1994) Nat Struct Biol 1: 55
    • Interaction of the Peptide Cf3-Leu-Ala-Nh-C6H4-Cf3(Tfla) with Porcine Pancreatic Elastase. X-Ray Studies at 1.8 Angstroms
      Li De La Sierra, I., Papamichael, E., Sakarelos, C., Dimicoli, J.-L., Prange, T.
      (1990) J Mol Recognit 3: 36
    • Structure of Native Porcine Pancreatic Elastase at 1.65 Angstroms Resolution
      Meyer, E., Cole, G., Radhakrishnan, R., Epp, O.
      (1988) Acta Crystallogr B 44: 26
    • Structure of the Product Complex of Acetyl-Ala-Pro-Ala with Porcine Pancreatic Elastase at 1.65 Angstroms Resolution
      Meyer, E., Radhakrishnan, R., Cole, G., Presta, L.G.
      (1986) J Mol Biol 189: 533
    • Crystallographic Study of the Binding of a Tri-Fluoroacetyl Dipeptide Anilide Inhibitor with Elastase
      Hughes, D.L., Diecker, L.C., Bieth, L.C., Dimicoli, J.-L.
      (1982) J Mol Biol 162: 645
    • The Indirect Mechanism of Action of the Trifluoroacetyl Peptides on Elastase
      Dimicoli, J.-L., Renaud, A., Bieth, J.
      (1980) Eur J Biochem 107: 423
    • The Atomic Structure of Crystalline Porcine Pancreatic Elastase at 2.5 Angstroms Resolution. Comparisons with the Structure of Alpha-Chymotrypsin
      Sawyer, L., Shotton, C.M., Campbell, J.W., Wendell, P.L., Muirhead, H., Watson, H.C., Diamond, R., Ladner, R.C.
      (1978) J Mol Biol 118: 137

    Organizational Affiliation

    Rosenstiel Basic Medical Sciences Research Center, Brandeis University, Waltham, Massachusetts 02254.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ELASTASEA [auth E]240Sus scrofaMutation(s): 0 
Gene Names: CELA1ELA1
EC: 3.4.21.36
UniProt
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
0QN
Query on 0QN

Download Ideal Coordinates CCD File 
B [auth E]N-(trifluoroacetyl)-L-valyl-N-[4-(trifluoromethyl)phenyl]-L-alaninamide
C17 H19 F6 N3 O3
XAJBYSREBDCYAJ-CABZTGNLSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
D [auth E]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
C [auth E]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
0QNKi:  140   nM  Binding MOAD
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 2
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000360 (0QN)
Query on PRD_000360
B [auth E]TRIFLUOROACETYL-L-VALYL-L-ALANYL-P-TRIFLUOROMETHYLANINIDEPeptide-like /  Inhibitor

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Work: 0.171 
  • R-Value Observed: 0.171 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.4α = 90
b = 57.6β = 90
c = 75.3γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1995-02-14
    Type: Initial release
  • Version 1.1: 2008-03-03
    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