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Improving the production of a novel antifungal alteramide B in Lysobacter enzymogenes OH11 by strengthening metabolic flux and precursor supply.

Abstract：

:Lysobacter enzymogenes OH11 is currently considered to be a novel biocontrol agent for various plant fungi diseases. At present, only heat-stable antifungal factor (HSAF) has been isolated and identified in culture, although other active compounds also showed antifungal activity. In the present study, a novel active compound, alteramide B (ATB), which exhibits broad-spectrum antagonistic activity against phytopathogenic fungi and oomycetes, was isolated. The genes responsible for ATB biosynthesis were also determined. In addition, a strain producing ATB with minimal HSAF production was successfully generated by redirecting metabolic flux, namely L. enzymogenes OH57. Furthermore, ATB production increased to 893.32 ± 15.57 mg/L through medium optimization and precursor supply strategy, which was 24.36-fold higher than that of 10% tryptic soy broth (36.67 ± 1.63 mg/L). Taken together, this study indicates ATB has great development value as a biopesticide because of its bioactivity and high production.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Tang B,Laborda P,Sun C,Xu G,Zhao Y,Liu F

doi

10.1016/j.biortech.2018.10.085

subject

Has Abstract

pub_date

2019-02-01 00:00:00

pages

196-202

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(18)31517-7

journal_volume

273

pub_type

杂志文章

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