Alternating Pattern of Stereochemistry in the Nonactin Macrocycle Is Required for Antibacterial Activity and Efficient Ion Binding
作者:Brian R. Kusche、Adrienne E. Smith、Michele A. McGuirl、Nigel D. Priestley
DOI:10.1021/ja9050235
日期:2009.12.2
Nonactin is a polyketide antibiotic produced by Streptomyces griseus ETH A7796 and is an ionophore that is selective for K(+) ions. It is a cyclic tetraester generated from two monomers of (+)-nonactic acid and two of (-)-nonactic acid, arranged (+)-(-)-(+)-(-) so that nonactin has S4 symmetry and is achiral. To understand why achiral nonactin is the naturally generated diastereoisomer, we generated