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5dh4

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PDE10 complexed with 5-chloro-N-[(2,4-dimethylthiazol-5-yl)methyl]pyrazolo[1,5-a]pyrimidin-7-amine

Structural highlights

5dh4 is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2.2Å
Ligands:	, , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

PDE10_HUMAN Plays a role in signal transduction by regulating the intracellular concentration of cyclic nucleotides. Can hydrolyze both cAMP and cGMP, but has higher affinity for cAMP and is more efficient with cAMP as substrate.^[1]

Publication Abstract from PubMed

Herein, we present the identification of a novel class of pyrazolopyrimidine phosphodiesterase 10A (PDE10A) inhibitors. Beginning with a lead molecule (1) identified through a fragment-based drug discovery (FBDD) effort, lead optimization was enabled by rational design, X-ray crystallography, metabolic and off-target profiling, and fragment scaffold-hopping. We highlight the discovery of PyP-1, a potent, highly selective, and orally bioavailable pyrazolopyrimidine inhibitor of PDE10A. PyP-1 exhibits sub-nanomolar potency (PDE10A Ki=0.23nM), excellent pharmacokinetic (PK) and physicochemical properties, and a clean off-target profile. It displays dose-dependent efficacy in numerous pharmacodynamic (PD) assays that measure potential for anti-psychotic activity and cognitive improvement. PyP-1 also has a clean preclinical profile with respect to cataleptic potential in rats, prolactin secretion, and weight gain, common adverse events associated with currently marketed therapeutics. Further, PyP-1 displays in vivo preclinical target engagement as measured by PET enzyme occupancy in concert with [(11)C]MK-8193, a novel PDE10A PET tracer.

Discovery of pyrazolopyrimidine phosphodiesterase 10A inhibitors for the treatment of schizophrenia.,Raheem IT, Schreier JD, Fuerst J, Gantert L, Hostetler ED, Huszar S, Joshi A, Kandebo M, Kim SH, Li J, Ma B, McGaughey G, Sharma S, Shipe WD, Uslaner J, Vandeveer GH, Yan Y, Renger JJ, Smith SM, Coleman PJ, Cox CD Bioorg Med Chem Lett. 2016 Jan 1;26(1):126-32. doi: 10.1016/j.bmcl.2015.11.013., Epub 2015 Nov 10. PMID:26602277^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Wang H, Liu Y, Hou J, Zheng M, Robinson H, Ke H. Structural insight into substrate specificity of phosphodiesterase 10. Proc Natl Acad Sci U S A. 2007 Apr 3;104(14):5782-7. Epub 2007 Mar 26. PMID:17389385
↑ Raheem IT, Schreier JD, Fuerst J, Gantert L, Hostetler ED, Huszar S, Joshi A, Kandebo M, Kim SH, Li J, Ma B, McGaughey G, Sharma S, Shipe WD, Uslaner J, Vandeveer GH, Yan Y, Renger JJ, Smith SM, Coleman PJ, Cox CD. Discovery of pyrazolopyrimidine phosphodiesterase 10A inhibitors for the treatment of schizophrenia. Bioorg Med Chem Lett. 2016 Jan 1;26(1):126-32. doi: 10.1016/j.bmcl.2015.11.013., Epub 2015 Nov 10. PMID:26602277 doi:http://dx.doi.org/10.1016/j.bmcl.2015.11.013