The Glc2Man2-fragment of the N-glycan precursor – a novel ligand for the glycan-binding protein malectin?
作者:Lisa N. Müller、Claudia Muhle-Goll、Moritz B. Biskup
DOI:10.1039/c004502k
日期:——
The Glcα(1â3)Glcα(1â3)Manα(1â2)Man tetrasaccharide (Glc2Man2-fragment), a substructure of the natural N-glycan precursor, was synthesized. The interaction of this fragment with the protein malectin, a carbohydrate binding protein localized in the endoplasmatic reticulum, was investigated by 1H15N HSQC experiments and isothermal calorimetry. The chemical shift perturbations of nuclei in the protein's backbone caused by the binding of the Glc2Man2-fragment to malectin suggest a binding mode like the known ligand nigerose.
合成了天然N-糖苷前体的一个亚结构——Glcα(1â3)Glcα(1â3)Manα(1â2)Man四糖(Glc2Man2-片段)。通过1H15N HSQC实验和等温滴定量热法研究了该片段与定位于内质网的糖结合蛋白malectin的相互作用。Glc2Man2-片段与malectin结合引起的蛋白质主链中核的化学位移扰动暗示了其结合模式类似于已知的配体nigerose。