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Development of 6'-N-Acylated Isepamicin Analogs with Improved Antibacterial Activity Against Isepamicin-Resistant Pathogens.

Yeon Hee BanMyoung Chong SongHee Jin KimHeejeong LeeJae Bok WiJe Won ParkDong Gun LeeYeo Joon Yoon
Published in: Biomolecules (2020)
The development of new aminoglycoside (AG) antibiotics has been required to overcome the resistance mechanism of AG-modifying enzymes (AMEs) of AG-resistant pathogens. The AG acetyltransferase, AAC(6')-APH(2″), one of the most typical AMEs, exhibiting substrate promiscuity towards a variety of AGs and acyl-CoAs, was employed to enzymatically synthesize new 6'-N-acylated isepamicin (ISP) analogs, 6'-N-acetyl/-propionyl/-malonyl ISPs. They were all active against the ISP-resistant Gram-negative bacteria tested, and the 6'-N-acetyl ISP displayed reduced toxicity compared to ISP in vitro. This study demonstrated the importance of the modification of the 6'-amino group in circumventing AG-resistance and the potential of regioselective enzymatic modification of AG scaffolds for the development of more robust AG antibiotics.
Keyphrases
  • quantum dots
  • highly efficient
  • visible light
  • oxidative stress
  • molecular docking
  • gram negative
  • risk assessment
  • multidrug resistant
  • nitric oxide
  • antimicrobial resistance
  • hydrogen peroxide
  • structural basis