Post on 18-Jan-2016
Design and Synthesis of a Heterocyclic Compound Collection for Probing the Spatial Charactistics of ATP Binding SitesPresented at the CSIR Conference Centre
CSIR Biosciences
C.P. Kenyon, P.M. Matlaba, C.J. Parkinson, A.L. Rousseau
and C.W. van der Westhuyzen
February 28, 2006
Slide 2 © CSIR 2006 www.csir.co.za
• The kinases
• The nature of the ATP site
• A basis for selectivity
• Types of potential guest molecules
• Methodology for preparation
Slide 3 © CSIR 2006 www.csir.co.za
The Kinases• Proteins which transfer phosphoryl residues
• Utilise ATP as phosphate source
• All have an ATP site
• Why are kinases attractive targets?
Slide 4 © CSIR 2006 www.csir.co.za
Basic Structural Characteristics of the ATP Site
Typical ATP binding site
SugarBindingRegion
N
N N
N
N
O
OH OH
OPO
PO
PO-
O O -O
-O O- O
Mg2+
Mg2+
-O O
H2N O
H H
OHN
N H
Slide 5 © CSIR 2006 www.csir.co.za
Pharmaceutical example: Interactions of SB203580 in the p38 MAP Kinase
Slide 6 © CSIR 2006 www.csir.co.za
Rational Basis of Design
Slide 7 © CSIR 2006 www.csir.co.za
Scaffold Selection
N
N
N
N
N
N
N
N
NN
N
X
Pyrimidines Purines Imidazopyridines
Slide 8 © CSIR 2006 www.csir.co.za
Spatial Comparison of Scaffolds
Slide 9 © CSIR 2006 www.csir.co.za
Pyrimidines and Purines
N
N
N
N
N
N
N
N
N
Slide 10 © CSIR 2006 www.csir.co.za
Synthesis of Pyrimidines and Purines
N
N
Cl
Cl
N
N
NHR'
Cl
N
N
NHR'
Cl
NO
N
N
NHR1
NH2
NHR2
N
N N
N
NHR1
R2
N
N N
N
NHR2
R1
+
Slide 11 © CSIR 2006 www.csir.co.za
N
N
Cl
Cl
N
N
Cl
NH
N
N
Cl
NH
Ph
N
N
Cl
NH
OH
N
N
Cl
NH
CO2Me
Ph
N
N
N
NH
NO
N
N
N
NH
NO
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
Ph
N
N
N
N
N
Ph
N
N
N
NH
Ph
NO
N
N
N
NH
Ph
NO
N
N
N
NH
OH
NON
N
N
NH
OH
NO
Slide 12 © CSIR 2006 www.csir.co.za
Imidazopyridines
N
N
X
Slide 13 © CSIR 2006 www.csir.co.za
The Classical Approach
N
NH2
O
Cl
+
N
N
Cl
N
N
Slide 14 © CSIR 2006 www.csir.co.za
Diversity Orientated Approach
N
NH2
N
N RRCHO
R'
N
N
NR
NHR'
Slide 15 © CSIR 2006 www.csir.co.za
A l d e h y d e I s o c y a n i d e
N
N
N
NO
N
CHO
N
NP h
NH
7 2 %
N
NP h
NH
6 0 %
N
NP h
NH
N
O 1 4 %
N
NP h
NH
7 8 %
N
CHO
N
N
NH
N
5 4 %
N
N
NH
N
5 7 %
N
N
NH
N
O
N
2 0 %
N
N
NH
N
5 9 %
OCHO
N
N
NH
O
2 5 %
N
N
NH
O
6 0 %
N
O
N
N
HN
O
2 6 %
N
N
NH
O
7 3 %
CHO
H 3 CO
N
N
HN
OC H 3
4 8 %
N
N
HN
OC H 3
2 2 %
N
O
N
N
HN
OC H 3
2 0 %
N
N
HN
OC H 3
4 2 %
Slide 16 © CSIR 2006 www.csir.co.za
N
N
NH
N
O
NN
N
NH
O
Slide 17 © CSIR 2006 www.csir.co.za
The Way Ahead
Explore the untapped dimensionKinase and ATP –ase studies
Thanks To………
CSIR Thematic Programmes
Department of Science and Technology