The acylalkylpyrone synthase CsyB from Aspergillus oryzae catalyzes the one-pot formation of the 3-acyl-4-hydroxy-6-alkyl-alpha-pyrone scaffold from acetoacetyl-CoA, fatty acyl-CoA, and malonyl-CoA. This is the first type III polyketidesynthase that performs not only the polyketide chain elongation but also the condensation of two beta-ketoacyl units. The crystal structures of wild-type CsyB and its
Isolation of the antibiotic pseudopyronine B and SAR evaluation of C3/C6 alkyl analogs
作者:Leah M. Bouthillette、Catherine A. Darcey、Tess E. Handy、Sarah C. Seaton、Amanda L. Wolfe
DOI:10.1016/j.bmcl.2017.04.067
日期:2017.6
for antibacterial activity againstGram-positive and Gram-negative bacteria. We found a direct relationship between antibacterial activity and C3/C6 alkyl chain length. For inhibition of Gram-positive bacteria, alkyl chain lengths between 6 and 7 carbons were found to be the most active (IC50=0.04-3.8µg/mL) whereas short alkyl chain analogs showed modest activity against Gram-negative bacteria (IC50=223-304µg/mL)