Metal-binding and redox properties of substituted linear and cyclic ATCUN motifs
作者:Kosh P. Neupane、Amanda R. Aldous、Joshua A. Kritzer
DOI:10.1016/j.jinorgbio.2014.06.004
日期:2014.10
The amino-terminalcopper and nickelbinding (ATCUN) motif is a short peptide sequence found in human serum albumin and other proteins. Synthetic ATCUN–metal complexes have been used to oxidatively cleave proteins and DNA, cross-link proteins, and damage cancer cells. The ATCUNmotif consists of a tripeptide that coordinates Cu(II) and Ni(II) ions in a square planar geometry, anchored by chelation
Macrocyclization of the ATCUN Motif Controls Metal Binding and Catalysis
作者:Kosh P. Neupane、Amanda R. Aldous、Joshua A. Kritzer
DOI:10.1021/ic302820z
日期:2013.3.4
analogues of the amino-terminalcopper and nickelbinding (ATCUN) motif. These macrocycles have altered pH transitions for metal binding, and unlike linear ATCUNmotifs, the optimal cyclic peptide 1 binds Cu(II) selectively over Ni(II) at physiological pH. UV–vis and EPR spectroscopy showed that cyclic peptide 1 can coordinate Cu(II) or Ni(II) in a square planar geometry. Metal binding titration and ESI-MS