Episelection: novel KI ~nanomolar inhibitors of serine proteases selected by binding or chemistry on an enzyme surface

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Work: 0.134 
  • R-Value Observed: 0.134 

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Episelection: novel Ki approximately nanomolar inhibitors of serine proteases selected by binding or chemistry on an enzyme surface.

Katz, B.A.Finer-Moore, J.Mortezaei, R.Rich, D.H.Stroud, R.M.

(1995) Biochemistry 34: 8264-8280

  • DOI: https://doi.org/10.1021/bi00026a008
  • Primary Citation of Related Structures:  
    1BTW, 1BTX, 1BTY, 1BTZ

  • PubMed Abstract: 

    A novel class of mechanism-based inhibitors of the serine proteases is developed using epitaxial selection. Tripeptide boronates esterified by an alcohol or alcohols at the boron retain the tight binding to trypsin-like enzymes associated with transition-state analogs and incorporate additional groups that can be utilized for selectivity between proteases. Formed by reaction of a series of alcohols with the inhibitor boronate oxygen(s), the most structurally compatible alcohol-derivatized inhibitors are either selected by binding to the enzyme (epitaxial selection) or assembled by epitaxial reaction on the enzyme surface. Mass spectrometry of the derivatized boronates and X-ray crystallography of the complexes identify the chemical structures and the three-dimensional interactions of inhibitors generated. This scheme also engineers novel, potent (Ki approximately 7 nM), and more specific inhibitors of individual serine proteases, by derivitizations of compounds obtained by epitaxial selection.

  • Organizational Affiliation

    Arris Pharmaceutical Corporation, South San Francisco, California 94080, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
BETA-TRYPSIN229Bos taurusMutation(s): 0 
Find proteins for P00760 (Bos taurus)
Explore P00760 
Go to UniProtKB:  P00760
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00760
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 0ZY

Download Ideal Coordinates CCD File 
B [auth A]N-(tert-butoxycarbonyl)-L-alanyl-N-{(1R)-5-ammonio-1-[hydroxy(methoxy)boranyl]pentyl}-L-valinamide
C19 H40 B N4 O6
Query on CA

Download Ideal Coordinates CCD File 
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Work: 0.134 
  • R-Value Observed: 0.134 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.84α = 90
b = 58.61β = 90
c = 67.47γ = 90
Software Package:
Software NamePurpose
XDSdata scaling
X-PLORmodel building
XDSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1995-10-15
    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