Photoaffinity study of the cellular interactions of ilimaquinone
作者:Heike S. Radeke、Marc L. Snapper
DOI:10.1016/s0968-0896(98)00100-x
日期:1998.8
The marine sponge metabolite ilimaquinone (1) displays a broad range of biological activities. To better understand the effects of this natural product, a photoaffinity analogue was synthesized and used to probe the cellular interactions of ilimaquinone. Irradiation of photoaffinity probe 5 with liver cytosol in the presence and absence of excess competitive inhibitor 2 suggests that S-adenosylhomocysteinase is an important intracellular target of ilimaquinone. (C) 1998 Elsevier Science Ltd. All rights reserved.
S -adenosylmethionine reverses ilimaquinone's vesiculation of the Golgi apparatus
作者:Rebecca L Casaubon、Marc L Snapper
DOI:10.1016/s0960-894x(00)00617-x
日期:2001.1
The marine sponge metabolite ilimaquinone has a wide range of biological activities, including vesiculation of the Golgi apparatus and interference with intracellular protein trafficking. Some of these activities may arise from ilimaquinone's influence on the activated methyl cycle. To visualize the morphological effects of ilimaquinone on the Golgi apparatus, NRK (normal rat kidney) cells were labeled with fluorescent wheat germ agglutinin and treated with ilimaquinone in the presence and absence of the methylating agent S-adenosylmethionine (SAMe). While ilimaquinone alone fragments the Golgi apparatus, the organelle remains intact when SAMe is included in the incubation mixture. This observation supports ilimaquinone's interaction with methylation enzymes as the cause of Golgi vesiculation. The examination of a fluorescently labeled ilimaquinone analogue in NRK cells suggests that the cellular interactions of ilimaquinone are not localized to the Golgi apparatus. (C) 2001 Published by Elsevier Science Ltd.