The interactions between several peptides with low molecular weight (guest, NH2 Arg Arg Trp Trp H 2; NH2 Arg Trp Arg Trp H 3; NH2 Trp Arg Arg Trp H 4; NH2 Arg Arg Trp Trp Trp Trp H 5; NH2 Trp Trp Arg Arg Trp Trp H 6; ...The interactions between several peptides with low molecular weight (guest, NH2 Arg Arg Trp Trp H 2; NH2 Arg Trp Arg Trp H 3; NH2 Trp Arg Arg Trp H 4; NH2 Arg Arg Trp Trp Trp Trp H 5; NH2 Trp Trp Arg Arg Trp Trp H 6; NH2 Arg Arg Trp Trp Trp Trp Trp Trp H 7; NH2 Arg Arg Trp Trp Trp Trp Trp Trp Trp Trp H 8) and β cyclodextrin dimer (host, 1) bridged with the derivative of (1R, 3R) 1 aminocyclobutane cis 1,3 dicar boxylic acid were investigated by using fluorescence polarization method in buffer aqueous solution (pH 7.4) at 298K. The binding constants of the cyclodextrin dimer 1 to the guests 2 8 were determined. It was shown that there was a cooperative action of the two cavities of a cyclodextrin dimer in the binding of large substrates, and that the structure and properties of amino acid in the peptides played very important roles in the synergic complexation between host and guest.展开更多
文摘The interactions between several peptides with low molecular weight (guest, NH2 Arg Arg Trp Trp H 2; NH2 Arg Trp Arg Trp H 3; NH2 Trp Arg Arg Trp H 4; NH2 Arg Arg Trp Trp Trp Trp H 5; NH2 Trp Trp Arg Arg Trp Trp H 6; NH2 Arg Arg Trp Trp Trp Trp Trp Trp H 7; NH2 Arg Arg Trp Trp Trp Trp Trp Trp Trp Trp H 8) and β cyclodextrin dimer (host, 1) bridged with the derivative of (1R, 3R) 1 aminocyclobutane cis 1,3 dicar boxylic acid were investigated by using fluorescence polarization method in buffer aqueous solution (pH 7.4) at 298K. The binding constants of the cyclodextrin dimer 1 to the guests 2 8 were determined. It was shown that there was a cooperative action of the two cavities of a cyclodextrin dimer in the binding of large substrates, and that the structure and properties of amino acid in the peptides played very important roles in the synergic complexation between host and guest.
基金Supported by the Scientific Research Fund of Hunan Provincial Education Department(No.12A132)the financial supports from the Scientific Research Fund of Hunan Provincial Education Department(No.201104)the Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education for the research work~~
