Applied Biotechnology Research Group, Department of Molecular and Applied Biosciences, School of Life Sciences, University of Westminster, 115 New Cavendish Street, W1W 6UW, London, UK.
Appl Microbiol Biotechnol. 2010 Sep;88(1):65-73. doi: 10.1007/s00253-010-2722-0. Epub 2010 Jun 23.
This work proposes a novel approach for enhancing the yield of lovastatin in Aspergillus terreus cultures by exploiting linoleic acid-derived signalling molecules, which are potentially involved in fungal cell-cell communication. High-performance liquid chromatography analysis revealed that production of lovastatin was enhanced up to 1.8-fold upon exogenous addition of the oxylipin precursor linoleic acid to low cell density cultures of A. terreus. Real-time PCR analysis showed that supplementation of linoleic acid also resulted in an increase in transcriptional levels of lovastatin biosynthetic genes lovB and lovF, indicating a transcriptional control of fatty acids (linoleic acid) on these genes in A. terreus. This study therefore demonstrates for the first time the potential of an oxylipin molecule as an enhancer of a fungal secondary metabolite production with positive impact for industrial exploitation.
本研究提出了一种通过利用潜在参与真菌细胞间通讯的亚油酸衍生信号分子来提高土曲霉培养物中洛伐他汀产量的新方法。高效液相色谱分析表明,在外源添加亚油酸这种氧化脂前体到土曲霉低细胞密度培养物中后,洛伐他汀的产量提高了 1.8 倍。实时 PCR 分析表明,亚油酸的补充也导致洛伐他汀生物合成基因 lovB 和 lovF 的转录水平增加,表明在土曲霉中,脂肪酸(亚油酸)对这些基因的转录控制。因此,本研究首次证明了一种氧化脂分子作为真菌次生代谢产物生产增强剂的潜力,这对工业开发具有积极影响。