Molecular cloning and heterologous expression of the dehydrophos biosynthetic gene cluster.
Dehydrophos is a vinyl phosphonate tripeptide produced by Streptomyces luridus with demonstrated broad-spectrum antibiotic activity. To identify genes necessary for biosynthesis of this unusual compound we screened a fosmid library of S. luridus for the presence of the phosphoenolpyruvate mutase gene, which is required for biosynthesis of most phosphonates. Integration of one such fosmid clone into the chromosome of S. lividans led to heterologous production of dehydrophos. Deletion analysis of this clone allowed identification of the minimal contiguous dehydrophos cluster, which contained 17 open reading frames (ORFs). Bioinformatic analyses of these ORFs are consistent with a proposed biosynthetic pathway that generates dehydrophos from phosphoenolpyruvate. The early steps of this pathway are supported by analysis of intermediates accumulated by blocked mutants and in vitro biochemical experiments.
Circello
Benjamin T
BT
Department of Microbiology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
Eliot
Andrew C
AC
Lee
Jin-Hee
JH
van der Donk
Wilfred A
WA
Metcalf
William W
WW
D000900:Anti-Bacterial Agents / Q000378:metabolism*; D003001:Cloning, Molecular; D005798:Genes, Bacterial; D023281:Genomics; D005810:Multigene Family; D009154:Mutation; D009842:Oligopeptides / Q000235:genetics / Q000378:metabolism*; D063065:Organophosphonates / Q000378:metabolism*; D017875:Phosphotransferases (Phosphomutases) / Q000235:genetics; D013302:Streptomyces / Q000235:genetics* / Q000378:metabolism
D000900:Anti-Bacterial Agents; D009842:Oligopeptides; D063065:Organophosphonates; D017875:Phosphotransferases (Phosphomutases); C057167:phosphoenolpyruvate mutase