Background:

Equisetin is an N-methylserine-derived acyl tetramic acid isolated from a terrestrial fungus Fusarium equiseti NRRL 5537[1]. Equisetin is a tetramate-containing natural product with antibiotic and cytotoxic activity[2]. Equisetin inhibits the growth of Gram-positive bacteria and HIV-1 integrase activity but shows no activity against Gram-negative bacteria[3]. Equisetin is a Quorum-sensing inhibitor (QSI) that attenuates QS-regulated virulence phenotypes in P. aeruginosa without affecting the growth of bacterias, serves as a leading compound for the treatment of P. aeruginosa infections[4].

参考文献:
[1]. Burmeister HR, et al. Antibiotic produced by Fusarium equiseti NRRL 5537. Antimicrob Agents Chemother. 1974 Jun;5(6):634-9.
[2]. Vesonder RF, et al. Equisetin, an antibiotic from Fusarium equiseti NRRL 5537, identified as a derivative of N-methyl-2, 4-pyrollidone. J Antibiot (Tokyo). 1979 Jul;32(7):759-61.
[3]. Lee J, et al. The hierarchy quorum sensing network in Pseudomonas aeruginosa. Protein Cell. 2015 Jan;6(1):26-41.
[4]. Zhang M, et al. Equisetin as potential quorum sensing inhibitor of Pseudomonas aeruginosa. Biotechnol Lett. 2018 May;40(5):865-870.