Zinc Complexes of Artificial Histidine-containing Dipeptides as Catalysts of Hydrolyses of<i>p</i>-Nitrophenyl Phosphates
作者:Kazuhiko Ichikawa、M. Khabir Uddin、Kou Nakata
DOI:10.1246/cl.1999.115
日期:1999.2
Zinc complexes of histidine-containing peptide derived from N,N′-dihistidylethylenediamine L1 and im-bzl-N,N″-dihistidyldiethylenetriamine L2 were designed and examined as catalysts for hydrolyses of bis(p-nitrophenyl)phosphate (BNPP) and p-nitrophenyl phosphate (NPP). The zinc complex of L1 was inactive and another L2 complex hydrolyzed efficiently BNPP and NPP: their pseudo-first-order rate constants are 1.1 × 10−5 s−1 and 2.1 × 10−5 s−1, respectively.
研究人员设计了由 N,N′-二组二乙烯二胺衍生的含组氨酸肽的锌络合物 L1 和 im-bzl-N,N″-dihistidyldiethylenetriamine 的锌络合物,并将其作为磷酸双(对硝基苯基)磷酸酯(BNPP)和磷酸对硝基苯基磷酸酯(NPP)水解的催化剂进行了研究。L1 的锌络合物没有活性,而另一种 L2 络合物则能有效水解 BNPP 和 NPP:它们的假一阶速率常数分别为 1.1 × 10-5 s-1 和 2.1 × 10-5 s-1。