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Cyclic peptides with a linear tail (CPLT) have been successfully used to model two zinc fingers (ZFs) adopting the treble-clef- and loosened zinc-ribbon folds. In this article, we examine the factors that may influence the design of such ZF models: mutations in the sequence, size of the cycle, and size of the tail. For this purpose, several peptides derived(More)
Creating efficient artificial catalysts that can compete with biocatalysis has been an enduring challenge which has yet to be met. Reported herein is the synthesis and characterization of a series of zinc complexes designed to catalyze the hydrolysis of phosphate diesters. By introducing a hydrated aldehyde into the ligand we achieve turnover for DNA-like(More)
Singlet oxygen ((1)O2) plays an important role in oxidative stress in all types of organisms, most of them being able to mount a defense against this oxidant. Recently, zinc finger proteins have been proposed to be involved in its cellular detection but the molecular basis of this process still remains unknown. We have studied the reactivity of a Zn(Cys)4(More)
Singlet oxygen ((1)O2) is an important reactive oxygen species in biology that has deleterious effects. Proteins constitute the main target of (1)O2 in cells. Several organisms are able to mount a transcriptional defense against (1)O2. ChrR and MBS are two proteins with Zn(Cys)2(His)2 zinc finger sites that are involved in the regulation of the defense(More)
The incorporation of a synthetic, catalytically competent metallocofactor into a protein scaffold to generate an artificial metalloenzyme (ArM) has been explored since the late 1970's. Progress in the ensuing years was limited by the tools available for both organometallic synthesis and protein engineering. Advances in both of these areas, combined with(More)
Regulation of enzymatic activity is essential for living organisms. Nowadays, with the emergence of synthetic biology, there is a rising interest in placing the activity of synthetic catalysts under the control of a cell. This short review aims at summarizing the regulation strategies developed to date, and at presenting the development of an artificial(More)