Novel fluorescent ceramide derivatives for probing ceramidase substrate specificity
作者:Krishna P. Bhabak、Denny Proksch、Susanne Redmer、Christoph Arenz
DOI:10.1016/j.bmc.2012.08.035
日期:2012.10
regulators of cell fate. The biochemistry of different ceramidases and of their substrate ceramide appears to be complex, mainly due to specific biophysical characteristics at the water-membrane interface. In the present study, we describe the design and synthesis of a set of fluorescently labeled ceramides as substrates for acid and neutral ceramidases. For the first time we have replaced the commonly
陶瓷酶是细胞命运的关键调节因子。主要由于水-膜界面的特定生物物理特性,不同的ceramidases酶及其底物神经酰胺的生物化学似乎很复杂。在本研究中,我们描述了一套设计和合成的荧光标记神经酰胺作为酸性和中性神经酰胺酶的底物。我们首次用亲脂性尼罗红(NR)染料代替了常用的极性NBD染料。动力学数据分析表明,尽管两种染料都没有明显偏向于神经酰胺中酰基或鞘氨醇(Sph)部分被酸性神经酰胺酶水解而水解,但是具有酰基取代NBD和Sph取代NR染料的神经酰胺已经被人们所接受。被发现是中性神经酰胺酶的较好底物。