Chiral, Polyionic Dendrimers with Complementary Charges − Synthesis and Chiroptical Properties
摘要:
Chiral dendrimers up to the second generation have been prepared from enantiopure aromatic bis- and tris(amino ac ids) by peptide coupling techniques. The dendrimers could be deprotected to yield water-soluble polyamine and/or polycarboxylic acid macromolecules. Two complementary types, with respect to the charges carried in water at pH = 7, were synthesised. A chiroptical study of the protected dendrimers, which were soluble in THF and CHCl3, was conducted. The results of that study indicate that the solution shapes of these dendrimers are rather decongested, with little steric interaction between different parts of the dendritic structure.
Chiral, Polyionic Dendrimers with Complementary Charges − Synthesis and Chiroptical Properties
摘要:
Chiral dendrimers up to the second generation have been prepared from enantiopure aromatic bis- and tris(amino ac ids) by peptide coupling techniques. The dendrimers could be deprotected to yield water-soluble polyamine and/or polycarboxylic acid macromolecules. Two complementary types, with respect to the charges carried in water at pH = 7, were synthesised. A chiroptical study of the protected dendrimers, which were soluble in THF and CHCl3, was conducted. The results of that study indicate that the solution shapes of these dendrimers are rather decongested, with little steric interaction between different parts of the dendritic structure.
Catalytic Unfolding and Proteolysis of Cytochrome <i>c</i> Induced by Synthetic Binding Agents
作者:Kevin Groves、Andrew J. Wilson、Andrew D. Hamilton
DOI:10.1021/ja0317731
日期:2004.10.1
A class of polyanionic copper porphyrin dimers is shown to selectively increase the susceptibility of cytochrome c to proteolysis through binding-induced disruption of tertiary and secondary structure. The free energy of the protein conformation leading to proteolytic attack is stabilized by about 2.4 kcal/mol in the bound state. The proteolytic acceleration is catalytic in nature, requiring only a fraction of an equivalent of metalloporphyrin to effect complete, rapid digestion in the presence of a protease.
Chiral, Polyionic Dendrimers with Complementary Charges − Synthesis and Chiroptical Properties
Chiral dendrimers up to the second generation have been prepared from enantiopure aromatic bis- and tris(amino ac ids) by peptide coupling techniques. The dendrimers could be deprotected to yield water-soluble polyamine and/or polycarboxylic acid macromolecules. Two complementary types, with respect to the charges carried in water at pH = 7, were synthesised. A chiroptical study of the protected dendrimers, which were soluble in THF and CHCl3, was conducted. The results of that study indicate that the solution shapes of these dendrimers are rather decongested, with little steric interaction between different parts of the dendritic structure.