4Q2K

Bovine alpha chymotrypsin bound to a cyclic peptide inhibitor, 5b


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.209 

wwPDB Validation 3D Report Full Report



Literature

Macrocyclic Protease Inhibitors with Reduced Peptide Character

Chua, K.C.H.Pietsch, M.Zhang, X.Hautmann, S.Chan, H.Y.Bruning, J.B.Gutschow, M.Abell, A.D.

(2014) Angew Chem Int Ed Engl 

  • DOI: 10.1002/anie.201404301
  • Primary Citation of Related Structures:  
    4Q2K

  • PubMed Abstract: 
  • There is a real need for simple structures that define a β-strand conformation, a secondary structure that is central to peptide-protein interactions. For example, protease substrates and inhibitors almost universally adopt this geometry on active site binding ...

    There is a real need for simple structures that define a β-strand conformation, a secondary structure that is central to peptide-protein interactions. For example, protease substrates and inhibitors almost universally adopt this geometry on active site binding. A planar pyrrole is used to replace two amino acids of a peptide backbone to generate a simple macrocycle that retains the required geometry for active site binding. The resulting β-strand templates have reduced peptide character and provide potent protease inhibitors with the attachment of an appropriate amino aldehyde to the C-terminus. Picomolar inhibitors of cathepsin L and S are reported and the mode of binding of one example to the model protease chymotrypsin is defined by X-ray crystallography.


    Organizational Affiliation

    School of Chemistry & Physics, The University of Adelaide, North Terrace, Adelaide, SA 5005 (Australia).



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Chymotrypsinogen AABCD245Bos taurusMutation(s): 0 
EC: 3.4.21.1
Find proteins for P00766 (Bos taurus)
Explore P00766 
Go to UniProtKB:  P00766
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
5BF
Query on 5BF

Download CCD File 
A, B, C, D
(11S)-4,9-dioxo-N-[(2S)-1-oxo-3-phenylpropan-2-yl]-17,22-dioxa-10,30-diazatetracyclo[21.2.2.2~13,16~.1~5,8~]triaconta-1(25),5,7,13,15,23,26,28-octaene-11-carboxamide
C36 H37 N3 O6
AGFHTNIIYCVXSL-UVMMSNCQSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.209 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.61α = 90
b = 109.34β = 93.47
c = 89.07γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-23
    Type: Initial release