Twenty kinds of cyclic dipeptides containing L-leucine were synthesized, and their antioxidant activity against (OH)-O-center dot and O-2(center dot-) was investigated. Compounds possessing polar amino acid residues, such as Asp, Cys, Glu, Lys, Pro, Ser, and Trp, exhibited higher antioxidant activity against (OH)-O-center dot than vitamin E. However, only cyclo(L-Cys-L-Leu) scavenged O-2(center dot-). (C) 2012 Elsevier Ltd. All rights reserved.
A minimalistic hydrolase based on co-assembled cyclic dipeptides
作者:Alexander J. Kleinsmann、Boris J. Nachtsheim
DOI:10.1039/c9ob02198a
日期:——
The self-assembly of small peptides into larger aggregates is an important process for the fundamental understanding of abiogenesis. In this article we demonstrate that blends of cyclic dipeptides (2,5-diketopiperazines – DKPs) bearing either histidine or cysteine in combination with a lipophilic amino acid form highly stable aggregates in aqueous solution with esterase-like activity. We demonstrate