METHOD OF COVALENTLY MODIFYING PROTEINS WITH ORGANIC MOLECULES TO PREVENT AGGREGATION
申请人:Luk Yan-Yeung
公开号:US20100273991A1
公开(公告)日:2010-10-28
A system and method for preventing protein aggregation is developed by covalent modification of proteins with organic molecules that can preserve the native protein folding. Proteins are covalently modified with sugar alcohols or cyclodextrins (organic Kosmotropes) or other small molecule drugs by water-driven bioorganic reactions in water. In the water-driven bioorganic reactions, the reagent is stable in water and can modify lysine residues or cysteine residue of a protein at physiological conditions with high yield and fast rate. Proteins and antibodies will be modified by non-natural sugar alcohols. As a result, the efficacy of protein drugs (reduction in aggregation and enzymatic degradation, and increase in blood stream life time) may be improved.
Water-driven ligations using cyclic aminosquarates: a class of useful S<sub>N</sub>1-like reactions
We report a class of water-soluble and -stable cyclic amino squarates that ligate with cysteine or lysine residues without side-products in an entirely aqueous environment. The ligations include addition–elimination reactions that are promoted by water in a way similar to SN1 reactions. The structural versatility of the reactants allows the potential recognition of selected amino acid residues on proteins.