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Abstract

PCL1606 synthesizes the antifungal antibiotic 2-hexyl, 5-propyl resorcinol (HPR), which is crucial for the biocontrol of fungal soil-borne pathogens. The genetic basis for HPR production lies in the genes, which are directly involved in the biosynthesis of HPR. In the present study, we elucidated the genetic features of the genes. Reverse transcription PCR experiments revealed an independent organization of the genes, except for which was transcribed as a polycistronic mRNA. analysis of each gene revealed putative promoters and terminator sequences, validating the proposed gene arrangement. Moreover, experiments utilizing 5′ rapid amplification of cDNA ends were used to determine the transcriptional initiation sites for the , , and gene promoters, and subsequently to confirm the functionality of these regions. The results of quantitative real-time PCR experiments indicated that biosynthetic genes were not only modulated through the global regulator , but also through and . The interplay between and revealed transcriptional cross-inhibition. However, these results also showed that other regulatory parameters play a role in HPR production, such as the environmental conditions and additional regulatory genes.

Funding
This study was supported by the:
  • Spanish Plan Nacional I+D+I (Award AGL2011-30354-C02-01 and AGL2008-05453-C02-01)
  • European Union (FEDER)
  • FPI, Ministerio de Ciencia e Innovación, Spain
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2014-12-01
2024-03-28
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