Enzymatic and Structural Characterization of Non-Peptide Ligand-Cyclophilin ComplexesKontopidis, G., Taylor, P., Walkinshaw, M.
(2004) Acta Crystallogr D Biol Crystallogr 60: 479-485
- PubMed: 14993672
- DOI: https://doi.org/10.1107/S0907444904000174
- Primary Citation of Related Structures:
1W8L, 1W8M, 1W8V
- PubMed Abstract:
Piperidine ligands are described that provide the first examples of non-peptidic ligand structures for the cyclophilin family of proteins. Crystal structures of two ligand complexes are compared with the unliganded protein and show ligand-induced changes in side-chain conformation and water binding. A peptidylprolyl cis-trans-isomerase assay showed the dissociation constants of the two ligands to be 320 and 25 mM. This study also provides the first published data for both enzymatic activity and three-dimensional structure for any protein-ligand complex that binds with a high-millimolar dissociation constant. The structures may be of relevance in the field of drug design, as they suggest starting points for the design of larger tighter-binding analogues.
Structural Biochemistry Group, Department of Biochemistry, The University of Edinburgh, Michael Swann Building, King's Buildings, Edinburgh EH9 3JR, Scotland.