Macrocyclization of the ATCUN motif controls metal binding and catalysis.
Macrocyclization of the ATCUN motif controls metal binding and catalysis.
复制标题
ATCUN 基序的大环化控制金属结合和催化。
DOI:
10.1021/ic302820z
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发表时间:
2013
影响因子:
4.6
通讯作者:
Kritzer,JoshuaA
中科院分区:
文献类型:
--
作者:
Neupane,KoshP;Aldous,AmandaR;Kritzer,JoshuaA
We report the design, synthesis, and characterization of macrocyclic analogues of the amino-terminal copper and nickel binding (ATCUN) motif. These macrocycles have altered pH transitions for metal binding, and unlike linear ATCUN motifs, the optimal cyclic peptide1binds Cu(II) selectively over Ni(II) at physiological pH. UV–vis and EPR spectroscopy showed that cyclic peptide1can coordinate Cu(II) or Ni(II) in a square planar geometry. Metal binding titration and ESI-MS data revealed a 1:1 binding stoichiometry. Macrocyclization allows for coordination of Cu(II) or Ni(II) as in linear ATCUN motifs, but with enhanced DNA cleavage by the Cu(II)-1complex relative to linear analogues. The Cu(II)-1complex was also capable of producing diffusible hydroxyl radicals, which is unique among ATCUN motifs and most other common copper(II) chelators.
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影响因子:
3.9
作者:
R. Nagane;T. Koshigoe;M. Chikira
通讯作者:
R. Nagane;T. Koshigoe;M. Chikira
影响因子:
4.6
作者:
Chin;D. Rorabacher;G. Cayley;D. W. Margerum
通讯作者:
D. W. Margerum
影响因子:
2.1
作者:
J. Azéma;C. Galaup;C. Picard;P. Tisnés;Patricia Ramos;O. Juanes;J. Rodríguez;E. Brunet
通讯作者:
E. Brunet
影响因子:
1.6
作者:
R. Singh;N. Sharma;R. Prasad;U. Singh
通讯作者:
U. Singh
DOI:
10.1039/a703065g
发表时间:
1997-10-07
期刊:
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
影响因子:
--
作者:
Aime, S;Batsanov, AS;Williams, JAG
通讯作者:
Williams, JAG