1ELA

Analogous inhibitors of elastase do not always bind analogously


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

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: 55-58

  • Primary Citation of Related Structures:  1ELB, 1ELC

  • PubMed Abstract: 
  • It has been assumed that the structure of a single inhibitor complex is sufficient to define the available subsites of an enzyme that has a unique binding site and a uniquely defined mode for ligand binding--the specificity for these subsites can thu ...

    It has been assumed that the structure of a single inhibitor complex is sufficient to define the available subsites of an enzyme that has a unique binding site and a uniquely defined mode for ligand binding--the specificity for these subsites can thus be probed by kinetic experiments. Elastase is an enzyme for which these traditional assumptions, which underlie such structural and kinetic studies, do not hold. Three new crystal structures of elastase complexed to chemically similar inhibitors with similar binding affinities reveal a diversity of binding modes as well as two new subsites on elastase. The existence of multiple binding sites and different binding modes for such similar inhibitors indicates that researchers must proceed with caution when using kinetics to map out protein subsites.


    Related Citations: 
    • 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
    • The Indirect Mechanism of Action of the Trifluoroacetyl Peptides on Elastase
      Dimicoli, J.-L.,Renaud, A.,Bieth, J.
      (1980) Eur.J.Biochem. 107: 423
    • 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 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
    • 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


    Organizational Affiliation

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




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 4 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
0Z1
Query on 0Z1

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Download CCD File 
A
6-ammonio-N-(trifluoroacetyl)-L-norleucyl-N-[4-(1-methylethyl)phenyl]-L-prolinamide
C22 H32 F3 N4 O3
BEGRGCCTDSKILY-ROUUACIJSA-O
 Ligand Interaction
ACY
Query on ACY

Download SDF File 
Download CCD File 
A
ACETIC ACID
C2 H4 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000365 (0Z1)
Query on PRD_000365
ATRIFLUOROACETYL-L-LYSYL-L-PROLYL-P-ISOPROPYLANILIDEPeptide-like / Inhibitor

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External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
0Z1Ki: 440 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.185 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 52.370α = 90.00
b = 57.710β = 90.00
c = 75.430γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORphasing
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-04-30
    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