Synthesis and preliminary evaluation of neoglycopolymers carrying multivalent N-glycopeptide units

Improved method for preparation and purification of recombinant α-synuclein: high-mannose-type free N-glycan prepared from an edible bean (Vigna angulari, Azuki bean) inhibits α-synuclein aggregation

Parkinson's disease is characterized by the accumulation of amyloid, which consists of α-synuclein (α-Syn). To screen compounds with amyloid aggregation inhibitory activity, an effective method for the preparation of α-Syn is a prerequisite. We established a simpler method for α-Syn preparation using freeze-thaw treatment of transformed Escherichia coli. Furthermore, we found that the high-mannose type free N-glycans could prevent α-Syn aggregation.

Large-scale preparation of sialyl-Tn antigen-containing peptides from mucin-like glycoproteins in boar seminal gel

Sialyl-Tn antigen, a tumor antigen, is a valuable ligand for the purification of proteins that specifically bind to it. Here, we developed a new method for the preparation of large amounts of sialyl-Tn antigen-containing peptides from an unused resource, boar seminal gel. The glycopeptides were prepared from the actinase E digests by a combination of gel filtration and hydrophilic partitioning.