Improved methods of native chemical ligation are provided. The methods involve reacting a thioacid (e.g. a peptide thioacid) with an aziridinyl compound (e.g. an aziridinyl peptide) under mild conditions without the use of protecting groups, and without requiring that a cysteine residue be present in the ligation product. Initial coupling of the thioacid and the aziridinyl compound yields a ligation product which contains an aziridinyl ring. Subsequent opening of the aziridinyl ring (e.g. via a nucleophilic attack) produces a linearized and modified ligation product.
提供了改进的天然
化学连接方法。该方法涉及在温和条件下,无需使用保护基,也无需要求连接产物中存在半胱
氨酸残基,将
硫酸(例如肽
硫酸)与环氧
丙烷化合物(例如环氧
丙烷肽)反应。
硫酸和环氧
丙烷化合物的初始偶联产生一个含有环氧
丙烷环的连接产物。随后通过亲核攻击等方式打开环氧
丙烷环,产生线性化和改性的连接产物。