6f8v
From Proteopedia
Crystal structure of the PDE4D catalytic domain in complex with GEBR-18b
Structural highlights
Disease[PDE4D_HUMAN] Note=Genetic variations in PDE4D might be associated with susceptibility to stroke. PubMed:17006457 states that association with stroke has to be considered with caution. Defects in PDE4D are the cause of acrodysostosis type 2, with or without hormone resistance (ACRDYS2) [MIM:614613]. ACRDYS2 is a pleiotropic disorder characterized by skeletal, endocrine, and neurological abnormalities. Skeletal features include brachycephaly, midface hypoplasia with a small upturned nose, brachydactyly, and lumbar spinal stenosis. Endocrine abnormalities include hypothyroidism and hypogonadism in males and irregular menses in females. Developmental disability is a common finding but is variable in severity and can be associated with significant behavioral problems.[1] Function[PDE4D_HUMAN] Hydrolyzes the second messenger cAMP, which is a key regulator of many important physiological processes.[2] [3] Publication Abstract from PubMedSelected members of the large rolipram-related GEBR family of type 4 phosphodiesterase (PDE4) inhibitors have been shown to facilitate long-term potentiation and to improve memory functions without causing emetic-like behavior in rodents. Despite their micromolar-range binding affinities and their promising pharmacological and toxicological profiles, few if any structure-activity relationship studies have been performed to elucidate the molecular bases of their action. Here, we report the crystal structure of a number of GEBR library compounds in complex with the catalytic domain of PDE4D as well as their inhibitory profiles for both the long PDE4D3 isoform and the catalytic domain alone. Furthermore, we assessed the stability of the observed ligand conformations in the context of the intact enzyme using molecular dynamics simulations. The longer and more flexible ligands appear to be capable of forming contacts with the regulatory portion of the enzyme, thus possibly allowing some degree of selectivity between the different PDE4 isoforms. Molecular Bases of PDE4D Inhibition by Memory-Enhancing GEBR Library Compounds.,Prosdocimi T, Mollica L, Donini S, Semrau MS, Lucarelli AP, Aiolfi E, Cavalli A, Storici P, Alfei S, Brullo C, Bruno O, Parisini E Biochemistry. 2018 May 15;57(19):2876-2888. doi: 10.1021/acs.biochem.8b00288., Epub 2018 May 1. PMID:29652483[4] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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