NUCLEAR magnetic resonance (NMR) spectroscopy has recently been found useful for investigating the conformations of polypeptides like gramicidin S1,2, valinomicin3 and so on. We now report preliminary conclusions on the conformation of the two peptide lactone rings of actinomycin D4 on the basis of NMR results and theoretical conformational analysis. Fig. 1 depicts the NMR spectra of actinomycin D obtained in different experimental conditions. The assignment has been made on the basis of chemical shift values, and the characteristics of the signals in double and triple resonance experiments. By examining the results obtained, some interesting features can be derived. © 1970 Nature Publishing Group.
Conformation of actinomycin-D / Conti, Filippo; DE SANTIS, Pasquale. - In: NATURE. - ISSN 0028-0836. - STAMPA. - 227:5264(1970), pp. 1239-1241. [10.1038/2271239a0]
Conformation of actinomycin-D
CONTI, Filippo;DE SANTIS, Pasquale
1970
Abstract
NUCLEAR magnetic resonance (NMR) spectroscopy has recently been found useful for investigating the conformations of polypeptides like gramicidin S1,2, valinomicin3 and so on. We now report preliminary conclusions on the conformation of the two peptide lactone rings of actinomycin D4 on the basis of NMR results and theoretical conformational analysis. Fig. 1 depicts the NMR spectra of actinomycin D obtained in different experimental conditions. The assignment has been made on the basis of chemical shift values, and the characteristics of the signals in double and triple resonance experiments. By examining the results obtained, some interesting features can be derived. © 1970 Nature Publishing Group.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
