|  |   Structural highlights | 3o56 is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. 
 |  | Ligands: | , , , , |  | Related: | 3d3p, 3o57 |  | Gene: | PDE4B, DPDE4 (Homo sapiens) |  | Activity: | 3',5'-cyclic-nucleotide phosphodiesterase, with EC number 3.1.4.17 |  | Resources: | FirstGlance, OCA, RCSB, PDBsum | 
 
  Publication Abstract from PubMed Following the discovery of 4-(substituted amino)-1-alkyl-pyrazolo[3,4-b]pyridine-5-carboxamides as potent and selective phosphodiesterase 4B inhibitors, [Hamblin, J. N.; Angell, T.; Ballentine, S., et al. Bioorg. Med. Chem. Lett.2008, 18, 4237] the SAR of the 5-position was investigated further. A range of substituted heterocycles showed good potencies against PDE4. Optimisation using X-ray crystallography and computational modelling led to the discovery of 16, with sub-nM inhibition of LPS-induced TNF-alpha production from isolated human peripheral blood mononuclear cells.
 Pyrazolopyridines as potent PDE4B inhibitors: 5-heterocycle SAR.,Mitchell CJ, Ballantine SP, Coe DM, Cook CM, Delves CJ, Dowle MD, Edlin CD, Hamblin JN, Holman S, Johnson MR, Jones PS, Keeling SE, Kranz M, Lindvall M, Lucas FS, Neu M, Solanke YE, Somers DO, Trivedi NA, Wiseman JO Bioorg Med Chem Lett. 2010 Oct 1;20(19):5803-6. Epub 2010 Aug 5. PMID:20732811[1]
 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
  See Also  References ↑ Mitchell CJ, Ballantine SP, Coe DM, Cook CM, Delves CJ, Dowle MD, Edlin CD, Hamblin JN, Holman S, Johnson MR, Jones PS, Keeling SE, Kranz M, Lindvall M, Lucas FS, Neu M, Solanke YE, Somers DO, Trivedi NA, Wiseman JO. Pyrazolopyridines as potent PDE4B inhibitors: 5-heterocycle SAR. Bioorg Med Chem Lett. 2010 Oct 1;20(19):5803-6. Epub 2010 Aug 5. PMID:20732811 doi:10.1016/j.bmcl.2010.07.136
 
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