Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 24528.44 
• Atom Count: 1711 
• Residue Count: 229 
• Unique protein chains: 1

1BTW

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

• DOI: 10.2210/pdb1BTW/pdb

• Classification: HYDROLASE/HYDROLASE INHIBITOR
• Organism(s): Bos taurus


• Deposited: 1995-05-17 Released: 1995-10-15 
• Deposition Author(s): Stroud, R.M., Katz, B.A., Finer-Moore, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.7 Å
• R-Value Work: 0.164 

Literature

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

• PubMed: 7599119 
• Primary Citation of Related Structures:  
  1BTZ, 1BTY, 1BTX


• 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.

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Related Citations: 

• Structure and Specific Binding of Trypsin, Comparison of Inhibited Derivatives and a Model for Substrate Binding
  Krieger, M.,Kay, L.M.,Stroud, R.M.
  (1974) J.Mol.Biol. 83: 209
• The Crystal and Molecular Structure of Dip-Inhibited Bovine Trypsin at 2.7 Angstroms Resolution
  Stroud, R.M.,Kay, L.M.,Dickerson, R.E.
  (1972) Cold Spring Harbor Symp.Quant.Biol. 36: 125
• Solvent Structure in Crystals of Trypsin Determined by X-Ray and Neutron Diffraction
  Finer-Moore, J.S.,Kossiakoff, A.,Hurley, J.H.,Earnest, T.,Stroud, R.M.
  (1992) Proteins 12: 203
• Difference Fourier Refinement of the Structure of Dip-Trypsin at 1.5 Angstroms Using a Minicomputer Technique
  Chambers, J.L.,Stroud, R.M.
  (1977) Acta Crystallogr.,Sect.B 33: 1824
• 1.59 Angstrom Structure of Trypsin at 120K: Comparison of Low Temperature and Room Temperature Structures
  Earnest, T.,Fauman, E.,Craik, C.S.,Stroud, R.M.
  (1991) Proteins 10: 171




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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
BETA-TRYPSIN	A	229	Bos taurus	Mutation(s): 0  EC: 3.4.21.4
Find proteins for P00760 (Bos taurus) Go to UniProtKB:  P00760

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
CA	A	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N
0ZW	A	N-(tert-butoxycarbonyl)-L-alanyl-N-{(1S)-5-ammonio-1-[hydroxy(3-hydroxypropoxy)boranyl]pentyl}-L-valinamide C21 H44 B N4 O7 JPOFXBAJTXFLAJ-ULQDDVLXSA-O

Biologically Interesting Molecules 1 Unique
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_000388 (0ZW)	A	T-BUTOXY-ALA-VAL-BORO-LYS 1,3-PROPANEDIOL MONOESTER	Peptide-like / Inhibitor		--

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.7 Å
• R-Value Work: 0.164 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 63.740	α = 90.00
b = 63.540	β = 90.00
c = 68.930	γ = 90.00

Software Package:

Software Name	Purpose
X-PLOR	phasing
RAXIS	data collection
R-AXIS	data reduction
X-PLOR	model building
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1995-05-17 
• Released Date: 1995-10-15 
• Deposition Author(s): Stroud, R.M., Katz, B.A., Finer-Moore, J.

Revision History 

• Version 1.0: 1995-10-15
  Type: Initial release
• Version 1.1: 2008-05-22
  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