Applied Microbiology and Biotechnology

, Volume 100, Issue 12, pp 5323–5338 | Cite as

Tafuketide, a phylogeny-guided discovery of a new polyketide from Talaromyces funiculosus Salicorn 58

  • Jia Guo
  • Huomiao Ran
  • Jie Zeng
  • Dong Liu
  • Zhihong XinEmail author
Biotechnological products and process engineering


A phylogeny-guided approach was applied to screen endophytic fungi containing type I polyketide synthase (PKS I) biosynthetic gene sequences and aimed to correlate genotype to chemotype for the discovery of novel bioactive polyketides. Salicorn 58, which was identified as Talaromyces funiculosus based on its internal transcribed spacer (ITS) and ribosomal large-subunit (LSU) DNA sequences, showed significant target bands. A chemical investigation of the culture of Salicorn 58 was allowed for the isolation of a new polyketide, Talafun (1), and a new natural product, N-(2′-hydroxy-3′-octadecenoyl)-9-methyl-4,8-sphingadienin (2), together with six known compounds, including chrodrimanin A (3), chrodrimanin B (4), N-(4-hydroxy-2-methoxyphenyl) acetamide (5), butyl β-glucose (6), 3β,15β-dihydroxyl-(22E, 24R)-ergosta-5,8(14),22-trien-7-dione (7), and (3β,5a,8a,22E)-5,8-epidioxyergosta-6,22-dien-3-ol (8). Their chemical structures were elucidated by extensive spectroscopic analysis and electro circular dichroism (ECD) spectrum calculations. Antioxidant experiments revealed that compound 5 showed strong ABTS+ radical scavenging activity with an IC50 value of 11.43 ± 1.61 μM and potent ferric reducing activity (FRAP assay) with FRAP value of 187.52 ± 2.97. Antimicrobial assays revealed that compounds 1 and 4 showed high levels of selectivity toward Escherichia coli with MIC values of 18 ± 0.40 and 43 ± 0.52 μM, respectively. Compounds 2 and 3 exhibited broad-spectrum antimicrobial activity against Staphylococcus aureus, Mycobacterium smegmatis, Micrococcus tetragenus, Mycobacterium phlei, and E. coli, respectively. The results from the current research highlight the advantage of phylogeny-guided pipeline for the screening of new polyketides from endophytic fungi containing PKS I genes.


PKS I gene A phylogeny-guided approach Antimicrobial activity Antioxidant activity 



This work was financially supported by the project funded by special funds of agro-product quality safety risk assessment of the Ministry of Agriculture of the People’s Republic of China (GJFP2015012).

Compliance with ethical standards

Human and animal rights

This article does not contain any studies with human or animal subjects.

Conflict of interest

The authors declare that they have no competing interests.

Supplementary material

253_2016_7311_MOESM1_ESM.pdf (734 kb)
ESM 1 (PDF 733 kb)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Jia Guo
    • 1
    • 3
  • Huomiao Ran
    • 1
  • Jie Zeng
    • 2
  • Dong Liu
    • 3
  • Zhihong Xin
    • 1
    Email author
  1. 1.Key Laboratory of Food Processing and Quality Control, College of Food Science and TechnologyNanjing Agricultural UniversityNanjingPeople’s Republic of China
  2. 2.School of Food ScienceHenan Institute of Science and TechnologyXinxiangPeople’s Republic of China
  3. 3.Shenzhen Key Laboratory of Fermentation, Purification and AnalysisShenzhen PolytechnicShenzhenPeople’s Republic of China

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