2ER6

The structure of a synthetic pepsin inhibitor complexed with endothiapepsin.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Work: 0.200 

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This is version 1.4 of the entry. See complete history


Literature

The structure of a synthetic pepsin inhibitor complexed with endothiapepsin

Cooper, J.Foundling, S.Hemmings, A.Blundell, T.Jones, D.M.Hallett, A.Szelke, M.

(1987) Eur J Biochem 169: 215-221

  • DOI: 10.1111/j.1432-1033.1987.tb13600.x
  • Primary Citation of Related Structures:  
    2ER6

  • PubMed Abstract: 
  • The conformation of a synthetic polypeptide inhibitor, bound to the active site of the fungal aspartic proteinase endothiapepsin (EC 3.4.23.6), has been determined by X-ray diffraction at 0.20-nm resolution and refined to an agreement factor of 0.20. The inhibitor: Pro Thr Glu Phe-R-Phe Arg Glu (R = -CH2NH-) is based on a chromogenic substrate of pepsin (EC 3 ...

    The conformation of a synthetic polypeptide inhibitor, bound to the active site of the fungal aspartic proteinase endothiapepsin (EC 3.4.23.6), has been determined by X-ray diffraction at 0.20-nm resolution and refined to an agreement factor of 0.20. The inhibitor: Pro Thr Glu Phe-R-Phe Arg Glu (R = -CH2NH-) is based on a chromogenic substrate of pepsin (EC 3.4.23.1). It has, in place of the scissile bond, a reduced peptide group which is resistant to hydrolysis and mimics the tetrahedral transition state. The inhibitor binds in an extended conformation with the reduced bond close to the essential aspartate side-chains of the enzyme. The hydrogen bonds and hydrophobic interactions between the enzyme and the inhibitor do not induce large conformational changes.


    Related Citations: 
    • The Active Site of Aspartic Proteinases
      Pearl, L., Blundell, T.
      (1984) FEBS Lett 174: 96
    • Active Site of Acid Proteinases
      Blundell, T.L., Jones, H.B., Khan, G., Taylor, G., Sewell, T.S., Pearl, L.H., Wood, S.P.
      (1979) Proc Febs Meet 60: 281
    • The Three-Dimensional Structure of Acid Proteinases
      Blundell, T.L., Jenkins, J.A., Khan, G., Roychowdhury, P., Sewell, T., Tickle, I.J., Wood, E.A.
      (1979) Proc Febs Meet 52: 81
    • Four-Fold Structural Repeat in the Acid Proteases
      Blundell, T.L., Sewell, B.T., Mclachlan, A.D.
      (1979) Biochim Biophys Acta 580: 24
    • Structural Evidence for Gene Duplication in the Evolution of Acid Proteases
      Tang, J., James, M.N.G., Hsu, I.N., Jenkins, J.A., Blundell, T.L.
      (1978) Nature 271: 618
    • Homology Among Acid Proteases. Comparison of Crystal Structures at 3 Angstroms Resolution of Acid Proteases from Rhizopus Chinensis and Endothia Parasitica
      Subramanian, E., Swan, I.D.A., Liu, M., Davies, D.R., Jenkins, J.A., Tickle, I.J., Blundell, T.L.
      (1977) Proc Natl Acad Sci U S A 74: 556
    • X-Ray Analysis and Circular Dichroism of the Acid Protease from Endothia Parasitica and Chymosin
      Jenkins, J., Tickle, I., Sewell, T., Ungaretti, L., Wollmer, A., Blundell, T.
      (1977) Adv Exp Med Biol 95: 43

    Organizational Affiliation

    Department of Crystallography, Birkbeck College, London, England.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ENDOTHIAPEPSINA [auth E]330Cryphonectria parasiticaMutation(s): 0 
Gene Names: EAPAEPN-1
EC: 3.4.23.6 (PDB Primary Data), 3.4.23.22 (UniProt)
UniProt
Find proteins for P11838 (Cryphonectria parasitica)
Explore P11838 
Go to UniProtKB:  P11838
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
H-256 peptideB [auth I]6N/AMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Work: 0.200 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.4α = 90
b = 73.8β = 109.5
c = 45.6γ = 90
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1991-01-15
    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
  • Version 1.4: 2017-11-29
    Changes: Derived calculations, Other