1ELD

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 Å
  • R-Value Work: 0.196 

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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

  • Primary Citation of Related Structures:  

  • 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 TF ...

    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.Mol.Biol. 1: 55
    • 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
    • Structure of Native Porcine Pancreatic Elastase at 1.65 Angstroms Resolution
      Meyer, E.,Cole, G.,Radhakrishnan, R.,Epp, O.
      (1988) Acta Crystallogr.,Sect.B 44: 26
    • 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.Recog. 3: 36
    • 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
    • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ELASTASE
E
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
CA
Query on CA

Download SDF File 
Download CCD File 
E
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
0Z0
Query on 0Z0

Download SDF File 
Download CCD File 
E
N-(trifluoroacetyl)-L-phenylalanyl-N-[4-(trifluoromethyl)phenyl]-L-alaninamide
TFAP
C21 H19 F6 N3 O3
YVHDCJDFGBMJNF-LRDDRELGSA-N
 Ligand Interaction
ACY
Query on ACY

Download SDF File 
Download CCD File 
E
ACETIC ACID
C2 H4 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000364 (0Z0)
Query on PRD_000364
EN-(trifluoroacetyl)-L-phenylalanyl-N-[4-(trifluoromethyl)phenyl]-L-alaninamidePeptide-like / Inhibitor

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External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
0Z0Ki: 200 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.196 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 52.030α = 90.00
b = 57.760β = 90.00
c = 75.319γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORrefinement
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-02-14
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.3: 2012-12-12
    Type: Other