1O5A

Dissecting and Designing Inhibitor Selectivity Determinants at the S1 site Using an Artificial Ala190 Protease (Ala190 uPA)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Dissecting and designing inhibitor selectivity determinants at the S1 site using an artificial Ala190 protease (Ala190 uPA)

Katz, B.A.Luong, C.Ho, J.D.Somoza, J.R.Gjerstad, E.Tang, J.Williams, S.R.Verner, E.Mackman, R.L.Young, W.B.Sprengeler, P.A.Chan, H.Mortara, K.Janc, J.W.McGrath, M.E.

(2004) J.Mol.Biol. 344: 527-547

  • DOI: 10.1016/j.jmb.2004.09.032
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • A site-directed mutant of the serine protease urokinase-type plasminogen activator (uPA), was produced to assess the contribution of the Ser190 side-chain to the affinity and selectivity of lead uPA inhibitors in the absence of other differences pres ...

    A site-directed mutant of the serine protease urokinase-type plasminogen activator (uPA), was produced to assess the contribution of the Ser190 side-chain to the affinity and selectivity of lead uPA inhibitors in the absence of other differences present in comparisons of natural proteases. Crystallography and enzymology involving WT and Ala190 uPA were used to calculate free energy binding contributions of hydrogen bonds involving the Ser190 hydroxyl group (O(gamma)(Ser190)) responsible for the remarkable selectivity of 6-halo-5-amidinoindole and 6-halo-5-amidinobenzimidazole inhibitors toward uPA and against natural Ala190 protease anti-targets. Crystal structures of uPA complexes of novel, active site-directed arylguanidine and 2-aminobenzimidazole inhibitors of WT uPA, together with associated K(i) values for WT and Ala190 uPA, also indicate a significant role of Ser190 in the binding of these classes of uPA inhibitors. Structures and associated K(i) values for a lead inhibitor (CA-11) bound to uPA and to five other proteases, as well as for other leads bound to multiple proteases, help reveal the features responsible for the potency (K(i)=11nM) and selectivity of the remarkably small inhibitor, CA-11. The 6-fluoro-5-amidinobenzimidzole, CA-11, is more than 1000-fold selective against natural Ala190 protease anti-targets, and more than 100-fold selective against other Ser190 anti-targets.


    Organizational Affiliation

    Celera, 180 Kimball Way, South San Francisco, CA 94080, USA. brad.katz@celera.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Urokinase-type plasminogen activator
A
23Homo sapiensMutation(s): 0 
Gene Names: PLAU
EC: 3.4.21.73
Find proteins for P00749 (Homo sapiens)
Go to Gene View: PLAU
Go to UniProtKB:  P00749
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Urokinase-type plasminogen activator
B
253Homo sapiensMutation(s): 2 
Gene Names: PLAU
EC: 3.4.21.73
Find proteins for P00749 (Homo sapiens)
Go to Gene View: PLAU
Go to UniProtKB:  P00749
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CIT
Query on CIT

Download SDF File 
Download CCD File 
B
CITRIC ACID
C6 H8 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-N
 Ligand Interaction
696
Query on 696

Download SDF File 
Download CCD File 
B
3-{5-[AMINO(IMINIO)METHYL]-1H-INDOL-2-YL}-1,1'-BIPHENYL-2-OLATE
CRA_8696
C21 H17 N3 O
GAVRMVQHHVMXFD-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
696Ki: 8 - 380 nM (98) BINDINGDB
696Ki: 380 nM BINDINGMOAD
696Ki: 380 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.209 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 81.780α = 90.00
b = 49.870β = 113.41
c = 66.740γ = 90.00
Software Package:
Software NamePurpose
CrystalCleardata reduction
Quantamodel building
CrystalCleardata collection
X-PLORrefinement
CrystalCleardata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-09-21
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance