McKinney D.C.,5 Gatehouse Drive |
Basarab G.S.,5 Gatehouse Drive |
Basarab G.S.,University of Cape Town |
Cocozaki A.I.,5 Gatehouse Drive |
And 13 more authors.
ACS Medicinal Chemistry Letters | Year: 2015
Negamycin is a natural product with antibacterial activity against a broad range of Gram-negative pathogens. Recent revelation of its ribosomal binding site and mode of inhibition has reinvigorated efforts to identify improved analogues with clinical potential. Translation-inhibitory potency and antimicrobial activity upon modification of different moieties of negamycin were in line with its observed ribosomal binding conformation, reaffirming stringent structural requirements for activity. However, substitutions on the N6 amine were tolerated and led to N6-(3-aminopropyl)-negamycin (31f), an analogue showing 4-fold improvement in antibacterial activity against key bacterial pathogens. This represents the most potent negamycin derivative to date and may be a stepping stone toward clinical development of this novel antibacterial class. © 2015 American Chemical Society.