1NC6

Potent, small molecule inhibitors of human mast cell tryptase. Anti-asthmatic action of a dipeptide-based transition state analogue containing benzothiazole ketone


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.175 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Potent, Small-Molecule Inhibitors of Human Mast Cell Tryptase. Antiasthmatic Action of a Dipeptide-Based Transition-State Analogue Containing a Benzothiazole Ketone.

Costanzo, M.J.Yabut, S.C.Almond Jr., H.R.Andrade-Gordon, P.Corcoran, T.W.De Garavilla, L.Kauffman, J.A.Abraham, W.M.Recacha, R.Chattopadhyay, D.Maryanoff, B.E.

(2003) J.Med.Chem. 46: 3865-3876

  • DOI: 10.1021/jm030050p
  • Also Cited By: 2ZA5

  • PubMed Abstract: 
  • Inhibitors of human mast cell tryptase (EC 3.4.21.59) have therapeutic potential for treating allergic or inflammatory disorders. We have investigated transition-state mimetics possessing a heterocycle-activated ketone group and identified in particu ...

    Inhibitors of human mast cell tryptase (EC 3.4.21.59) have therapeutic potential for treating allergic or inflammatory disorders. We have investigated transition-state mimetics possessing a heterocycle-activated ketone group and identified in particular benzothiazole ketone (2S)-6 (RWJ-56423) as a potent, reversible, low-molecular-weight tryptase inhibitor with a K(i) value of 10 nM. A single-crystal X-ray analysis of the sulfate salt of (2S)-6 confirmed the stereochemistry. Analogues 12 and 15-17 are also potent tryptase inhibitors. Although RWJ-56423 potently inhibits trypsin (K(i) = 8.1 nM), it is selective vs other serine proteases, such as kallikrein, plasmin, and thrombin. We obtained an X-ray structure of (2S)-6 complexed with bovine trypsin (1.9-A resolution), which depicts inter alia a hemiketal involving Ser-189, and hydrogen bonds with His-57 and Gln-192. Aerosol administration of 6 (2R,2S; RWJ-58643) to allergic sheep effectively antagonized antigen-induced asthmatic responses, with 70-75% blockade of the early response and complete ablation of the late response and airway hyperresponsiveness.


    Organizational Affiliation

    Drug Discovery, Johnson & Johnson Pharmaceutical Research & Development, Spring House, Pennsylvania 19477-0776, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Trypsinogen
A
223Bos taurusMutation(s): 0 
EC: 3.4.21.4
Find proteins for P00760 (Bos taurus)
Go to UniProtKB:  P00760
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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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
ABB
Query on ABB

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Download CCD File 
A
(2S,4R)-1-ACETYL-N-[(1S)-4-[(AMINOIMINOMETHYL)AMINO]-1-(2-BENZOTHIAZOLYLCARBONYL)BUTYL]-4-HYDROXY-2-PYRROLIDINECARBOXAMIDE
C20 H26 N6 O4 S
VXDAVYUFYPFGDX-SNPRPXQTSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
ABBKi: 10 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.175 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 54.670α = 90.00
b = 54.670β = 90.00
c = 107.870γ = 120.00
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
SCALEPACKdata scaling
X-PLORrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-09-23
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description