Synthesis of sulfated phenyl 2-acetamido-2-deoxy-D-galactopyranosides. 4-O-Sulfated phenyl 2-acetamido-2-deoxy-β-D-galactopyranoside is a competitive acceptor that decreases sulfation of chondroitin sulfate by N-acetylgalactosamine 4-sulfate 6-O-sulfotransferase
作者:Toshihiko Sawada、Sonoko Fujii、Hirofumi Nakano、Shiori Ohtake、Koji Kimata、Osami Habuchi
DOI:10.1016/j.carres.2005.06.010
日期:2005.9
have previously cloned N-acetylgalactosamine 4-sulfate 6-O-sulfotransferase (GalNAc4S-6ST), which transfers sulfate from 3'-phosphoadenosine 5'-phosphosulfate (PAPS) to the C-6 hydroxyl group of the GalNAc 4-sulfate residue of chondroitin sulfate A and forms chondroitin sulfate E containing GlcA-GalNAc(4,6-SO(4)) repeating units. To investigate the function of chondroitin sulfate E, the development of
我们之前已经克隆了N-乙酰半乳糖胺4-硫酸盐6-O-磺基转移酶(GalNAc4S-6ST),它将硫酸盐从3'-磷酸腺苷5'-磷酸硫酸盐(PAPS)转移到GalNAc 4-硫酸盐残基的C-6羟基上。硫酸软骨素A形成含有GlcA-GalNAc(4,6-SO(4))重复单元的硫酸软骨素E。为了研究硫酸软骨素E的功能,开发GalNAc4S-6ST特异性抑制剂非常重要。因为GalNAc4S-6ST需要连接到GalNAc残基的C-4羟基上的硫酸基团作为受体,所以硫酸化的GalNAc残基有望与GalNAc4S-6ST相互作用并影响其活性。在这项研究中,我们合成了在C-3,C-4,或C-6羟基,并检查了它们对重组GalNAc4S-6ST的抑制活性。我们发现,苯基β-GalNAc(4SO(4))竞争性抑制GalNAc4S-6ST,并且还可以作为受体。衍生自苯基β-GalNAc(4SO(4))的硫酸化产物与苯基β-GalNAc(4