View source for 5laq


==Crystal structure of human phosphodiesterase 4B catalytic domain with inhibitor NPD-001==
<StructureSection load='5laq' size='340' side='right'caption='[[5laq]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5laq]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5LAQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5LAQ FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.4&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=6M5:(4~{a}~{S},8~{a}~{R})-2-cycloheptyl-4-[4-methoxy-3-[4-[4-(1~{H}-1,2,3,4-tetrazol-5-yl)phenoxy]butoxy]phenyl]-4~{a},5,8,8~{a}-tetrahydrophthalazin-1-one'>6M5</scene>, <scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5laq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5laq OCA], [https://pdbe.org/5laq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5laq RCSB], [https://www.ebi.ac.uk/pdbsum/5laq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5laq ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PDE4B_HUMAN PDE4B_HUMAN] Hydrolyzes the second messenger cAMP, which is a key regulator of many important physiological processes. May be involved in mediating central nervous system effects of therapeutic agents ranging from antidepressants to antiasthmatic and anti-inflammatory agents.<ref>PMID:10846163</ref> <ref>PMID:15003452</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Several trypanosomatid cyclic nucleotide phosphodiesterases (PDEs) possess a unique, parasite-specific cavity near the ligand-binding region that is referred to as the P-pocket. One of these enzymes, Trypanosoma brucei PDE B1 (TbrPDEB1), is considered a drug target for the treatment of African sleeping sickness. Here, we elucidate the molecular determinants of inhibitor binding and reveal that the P-pocket is amenable to directed design. By iterative cycles of design, synthesis, and pharmacological evaluation and by elucidating the structures of inhibitor-bound TbrPDEB1, hPDE4B, and hPDE4D complexes, we have developed 4a,5,8,8a-tetrahydrophthalazinones as the first selective TbrPDEB1 inhibitor series. Two of these, 8 (NPD-008) and 9 (NPD-039), were potent ( Ki = 100 nM) TbrPDEB1 inhibitors with antitrypanosomal effects (IC50 = 5.5 and 6.7 muM, respectively). Treatment of parasites with 8 caused an increase in intracellular cyclic adenosine monophosphate (cAMP) levels and severe disruption of T. brucei cellular organization, chemically validating trypanosomal PDEs as therapeutic targets in trypanosomiasis.

Targeting a Subpocket in Trypanosoma brucei Phosphodiesterase B1 (TbrPDEB1) Enables the Structure-Based Discovery of Selective Inhibitors with Trypanocidal Activity.,Blaazer AR, Singh AK, de Heuvel E, Edink E, Orrling KM, Veerman JJN, van den Bergh T, Jansen C, Balasubramaniam E, Mooij WJ, Custers H, Sijm M, Tagoe DNA, Kalejaiye TD, Munday JC, Tenor H, Matheeussen A, Wijtmans M, Siderius M, de Graaf C, Maes L, de Koning HP, Bailey DS, Sterk GJ, de Esch IJP, Brown DG, Leurs R J Med Chem. 2018 May 1. doi: 10.1021/acs.jmedchem.7b01670. PMID:29672041<ref>PMID:29672041</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5laq" style="background-color:#fffaf0;"></div>

==See Also==
*[[Phosphodiesterase 3D structures|Phosphodiesterase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Brown DG]]
[[Category: Singh AK]]