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首页> 外文期刊>Journal of Biotechnology >Investigation of relationship between lipid and Monascus pigment accumulation by extractive fermentation
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Investigation of relationship between lipid and Monascus pigment accumulation by extractive fermentation

机译：提取发酵中脂质与红曲色素色素积累关系的研究

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摘要

Fermented Monascus pigments have been utilized as traditional Chinese medicine and food colorant for thousands of years. Under the limited nitrogen concentration and/or low initial pH 2.5 conditions, it was observed that production of intracellular pigments and accumulation of microbial lipids (high content reaching to approximately 50% in dry cell weight) by edible Monascus anka exhibited a positive correlated relationship. Extractive fermentation in nonionic surfactant micelle aqueous solution selectively exported the intracellular Monascus pigments into its extracellular broth, in which the concentration of intracellular pigments was negligible while the extracellular one was enhanced. The extractive fermentation provides a novel strategy for shifting of the metabolic channeling from intracellular lipid accumulation to Monascus pigment production. High pigment concentration, i.e., approximately 40 AU of extracellular Monascus pigments, was achieved by extractive fermentation at a relatively high nonionic surfactant concentration 10 g/l. This phenomenon might be attributed to the nonionic surfactant micelles acting as pigment reservoirs by biomimetic of intracellular lipids. (C) 2015 Elsevier B.V. All rights reserved.
机译：发酵红曲色素已被用作中药和食用色素数千年。在有限的氮浓度和/或较低的初始pH 2.5条件下，观察到可食用的红曲霉产生的细胞内色素的产生和微生物脂质的积累（高含量达到干细胞重量的约50％）表现出正相关关系。在非离子型表面活性剂胶束水溶液中的提取发酵选择性地将细胞内红曲霉色素输出到其细胞外肉汤中，其中细胞内色素的浓度可以忽略不计，而细胞外色素的浓度却增加了。提取发酵为将代谢通道从细胞内脂质积累转移到红曲色素的产生提供了新的策略。通过在相对较高的非离子表面活性剂浓度为10 g / l的条件下进行萃取发酵，可实现高颜料浓度，即约40 AU的细胞外红曲霉颜料。这种现象可能归因于非离子型表面活性剂胶束通过细胞内脂质的仿生作用而充当色素储存库。 （C）2015 Elsevier B.V.保留所有权利。

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