Directed Denaturation: Room Temperature and Stoichiometric Unfolding of Cytochrome c by a Metalloporphyrin Dimer
摘要:
Using circular dichroism, UV-vis, and trypsin proteolysis, we have shown how a metalloporphyrin dimer induces the unfolding of a protein, cytochrome c, under physiologically relevant conditions and accelerates its rate of proteolytic degradation.
Directed Denaturation: Room Temperature and Stoichiometric Unfolding of Cytochrome c by a Metalloporphyrin Dimer
摘要:
Using circular dichroism, UV-vis, and trypsin proteolysis, we have shown how a metalloporphyrin dimer induces the unfolding of a protein, cytochrome c, under physiologically relevant conditions and accelerates its rate of proteolytic degradation.
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.