PMID: 23161758
Berg L, Niemiec MS, Qian W, Andersson CD, Wittung-Stafshede P, Ekstrom F, Linusson A
Similar but Different: Thermodynamic and Structural Characterization of a Pair of Enantiomers Binding to Acetylcholinesterase.
Angew Chem Int Ed Engl. 2012 Nov 19. doi: 10.1002/anie.201205113.
Take a closer look: Unexpectedly, a pair of enantiomeric ligands proved to have similar binding affinities for acetylcholinesterase. Further studies indicated that the enantiomers exhibit different thermodynamic profiles. Analyses of the noncovalent interactions in the protein-ligand complexes revealed that these differences are partly due to nonclassical hydrogen bonds between the ligands and aromatic side chains of the protein.