Abstract
Phosphodiesterases (PDEs) are a superfamily of enzymes that degrade the intracellular second messengers cyclic AMP and cyclic GMP. As essential regulators of cyclic nucleotide signalling with diverse physiological functions, PDEs are drug targets for the treatment of various diseases, including heart failure, depression, asthma, inflammation and erectile dysfunction. Of the 12 PDE gene families, cGMP-specific PDE5 carries out the principal cGMP-hydrolysing activity in human corpus cavernosum tissue. It is well known as the target of sildenafil citrate (Viagra) and other similar drugs for the treatment of erectile dysfunction. Despite the pressing need to develop selective PDE inhibitors as therapeutic drugs, only the cAMP-specific PDE4 structures are currently available. Here we present the three-dimensional structures of the catalytic domain (residues 537-860) of human PDE5 complexed with the three drug molecules sildenafil, tadalafil (Cialis) and vardenafil (Levitra). These structures will provide opportunities to design potent and selective PDE inhibitors with improved pharmacological profiles.
Original language | English |
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Pages (from-to) | 98-102 |
Number of pages | 5 |
Journal | Nature |
Volume | 425 |
Issue number | 6953 |
DOIs | |
Publication status | Published - 2003 Sept 4 |
Externally published | Yes |
Bibliographical note
Funding Information:Acknowledgements We are grateful to J. R. H. Tame for a critical reading of the manuscript. We thank Z. No for providing sildenafil citrate; D.-K. Kim for providing vardenafil; D. K. Shin for discussion and figures; and H.-S. Lee and G.-H. Kim for their assistance at the Pohang Light Source (PLS), beamline 6B. Experiments at PLS were supported, in part, by the Ministry of Science and Technology (MOST) of Korea and POSCO. We also thank S.Y.P’s group for their assistance at Spring-8 for high-resolution data. This work was supported partially by a grant from the National Research Laboratory Program and the Center for Biological Modulators of the 21c Frontier R&D Program, subsidized MOST. This work was also supported partly by Yuyu Inc. and KT&G Co. Ltd..
ASJC Scopus subject areas
- General