Since the α-ester of α,γ-dimethyl N-benzyloxycarbonyl-α-dehydroglutamate (ΔGlu) was found to be hydrolyzed using papain, a variety of N-protected α-dehydroglutamates and their analogs, both esters of which were the same or different from each other, were newly synthesized and subjected to a similar hydrolysis. Although the substrates, with bulkier ester group at the γ- as well as α-positions, were found to become difficult to hydrolyze, the kind and size of the N-protecting group did not effect the hydrolysis. Moreover, it was found that the length of side chain of the substrate greatly influenced hydrolysis. The present study suggests that papain may become a useful tool for the hydrolysis and coupling of ΔGlu with α-amino acid or peptide.
由于发现α,γ-二甲基
N-苄氧羰基-α-脱氢谷
氨酸(ΔGlu)的α-酯可被
木瓜蛋白酶水解,因此新合成了多种 N-保护的α-脱氢谷
氨酸及其类似物,这些酯之间存在相同或不同之处,并进行了类似的
水解。虽然在 γ 和 α 位上有较多酯基的底物变得难以
水解,但 N 保护基的种类和大小并不影响
水解。此外,研究还发现底物侧链的长度对
水解有很大影响。本研究表明,
木瓜蛋白酶可能会成为ΔGlu与
α-氨基酸或肽
水解和偶联的有用工具。