Cantharimides: A new class of modified cantharidin analogues inhibiting protein phosphatases 1 and 2A
作者:Adam McCluskey、Cecilia Walkom、Michael C Bowyer、Stephen P Ackland、Emma Gardiner、Jennette A Sakoff
DOI:10.1016/s0960-894x(01)00594-7
日期:2001.11
Cantharidin and its analogues have been of considerable interest as potent inhibitors of the serine/threonine protein phosphatases 1 and 2A (PP1 and PP2A). However, limited modifications to the parent compounds is tolerated. As part of an ongoing study we have developed a new series of cantharidin analogues, the cantharimides. Inhibition studies indicate that cantharimides possessing a D- or L-histidine, are more potent inhibitors of PP1 and PP2A (PP1 IC50 = 3.22 +/- 0.7 muM; PP2A IC50 = 0.81 +/- 0.1 muM and PP1 IC50 = 2.82 +/- 0.6 muM; PP2A IC50 = 1.35 +/- 0.3 muM, respectively) than norcantharidin (PP1 IC50 = 5.31 +/- 0.76 muM; PP2A IC50 = 2.9 +/- 1.04 muM) and essentially equipotent with cantharidin (PP1 IC50 = 3.6 +/- 0.42 muM; PP2A IC50 = 0.36 +/- 0.08 muM). Cantharimides with non-polar or acidic amino acid residues are only poor inhibitors of PP1 and PP2A. (C) 2001 Elsevier Science Ltd. All rights reserved.
Synthesis, Characterization and Crystal Structure of Optically Active L- and D-Histidine Norcantharimide
作者:Dexiu Liu、Jie Sun、Yanfeng Wang
DOI:10.14233/ajchem.2014.17750
日期:——
L- and D-histidine norcantharimide was showed significant PP2A inhibitors effect. They were synthesized through a highly efficient combinatorial approach , to a solution of norcantharidin and L-histidine in 95 % EtOH under temperature affords L-histidine norcantharimide in 97 % yield. L-histidine norcantharimide was characterized by X-ray. This single crystal was orthorhombic with the space group P2(1)2(1)2(1). One unit cell dimensions were a = 10.1553(4) Å, b = 10.4840(5) Å and c = 12.8749(6) Å, respectively. a = b = g = 90°, Mr = 305.29, V = 1370.77(11) Å3, D = 1.479 Mg/m3, F(000) = 640 and Z = 4. The crystal structure is stabilized by a network of intermolecular hydrogen bonds involving N-H and COO– group.
L-组氨酸和D-组氨酸norcantharimide具有显著的PP2A抑制作用。它们是通过一种高效的组合方法合成的,在95%的EtOH溶液中,在低温条件下将诺坎特苷和L-组氨酸溶解,得到L-组氨酸诺坎特酰胺,收率为97%。L-histidine norcantharimide 通过 X 射线进行表征。该单晶体为正方晶,空间群为 P2(1)2(1)2(1)。a = b = g = 90°,Mr = 305.29,V = 1370.77(11) Å3,D = 1.479 Mg/m3,F(000) = 640,Z = 4。该晶体结构通过涉及 N-H 和 COO- 基团的分子间氢键网络得以稳定。