Enhancement in the rate of conversion of peptide Cys-Pro esters to peptide thioesters by structural modification
作者:Toru Kawakami、Akitaka Kamauchi、Emi Harada、Saburo Aimoto
DOI:10.1016/j.tetlet.2013.10.121
日期:2014.1
We previously reported that the peptide containing a Cys-Pro ester (CPE) moiety is spontaneously transformed into a peptide thioester via an N to S acyl shift followed by diketopiperazine formation. In an attempt to identify more reactive structures for the formation of a peptide thioester, we modified the CPE structure, in which the Pro residue in the CPE moiety was replaced with N-substituted glycine
我们先前曾报道过,含有Cys-Pro酯(
CPE)部分的肽通过从N到S的酰基转移而自发地转化为肽
硫酯,然后形成二酮
哌嗪。为了鉴定用于形成肽
硫酯的更多反应性结构,我们修饰了
CPE结构,其中
CPE部分中的Pro残基被N-取代的甘
氨酸衍
生物替代。这些肽被更快地转化成肽
硫酯。或者,在
CPE部分的C-末端添加
氨基酸残基也加速了
硫酯的形成。