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Production of Organic Acids01:25

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Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
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Microbial fermentation is central to food biotechnology, enhancing flavor, texture, preservation, and stability. Fermentative microorganisms metabolize carbohydrates into organic acids, alcohols, and other metabolites that inhibit spoilage organisms and improve digestibility while contributing distinctive sensory qualities.In baking, amylases naturally present in flour hydrolyze starch into monosaccharides such as glucose, which Saccharomyces cerevisiae ferments anaerobically. Through...
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Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
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Lactic acid bacteria (LAB) and molds are instrumental in fermenting plant-based foods to enhance preservation and ensure year-round availability. These microbial processes convert plant carbohydrates into organic acids and other metabolites that inhibit spoilage organisms and contribute to the sensory qualities of the final product.In sauerkraut production, cabbage goes through a microbial succession that starts with cocci such as Leuconostoc mesenteroides. These microbes begin fermentation by...
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Bioreactor Controls-III01:22

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Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...
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Pyruvate is the end product of glycolysis, where glucose is oxidized to pyruvate, simultaneously reducing NAD+ to NADH. Two molecules of ATP are also produced by substrate-level phosphorylation.
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Site-Specific Lysine Lactylation via Genetic Code Expansion in E. coli and Mammalian Cells
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[Recent developments in L-lactate fermentation by genetically modified microorganisms].

Xu Jiang1, Limin Wang2, Guimin Zhang1

  • 1College of Life Sciences, Hubei University, Wuhan 430062, Hubei, China.

Sheng Wu Gong Cheng Xue Bao = Chinese Journal of Biotechnology
|January 18, 2014
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Summary
This summary is machine-generated.

This review covers advances in L-lactic acid fermentation using genetically modified microbes. Developments focus on reducing costs and improving strain robustness for the growing poly (lactic acid) industry.

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Area of Science:

  • Biotechnology
  • Industrial Microbiology
  • Metabolic Engineering

Background:

  • Lactic acid is a key platform chemical with increasing demand driven by the poly (lactic acid) industry.
  • Efficient and cost-effective production of L-lactic acid is crucial for industrial applications.
  • Strain robustness and reduced fermentation costs are significant challenges in L-lactic acid manufacturing.

Purpose of the Study:

  • To review recent advancements in L-lactic acid fermentation.
  • To highlight the application of modern biotechnological approaches in strain development.
  • To provide an overview of genetically modified microorganisms used for L-lactic acid production.

Main Methods:

  • Genetic modification of microorganisms for enhanced L-lactic acid production.
  • Metabolic engineering strategies applied to lactic acid bacteria, yeast, E. coli, and Rhizopus species.
  • Fermentation process optimization for improved yield and productivity.

Main Results:

  • Various genetically modified strains show enhanced L-lactic acid production capabilities.
  • Biotechnological approaches have led to improved strain robustness and reduced fermentation costs.
  • Different microbial platforms offer distinct advantages for L-lactic acid synthesis.

Conclusions:

  • Genetic engineering and modern biotechnology are vital for advancing L-lactic acid fermentation.
  • Optimized microbial strains are essential for meeting the growing demand in the poly (lactic acid) sector.
  • Continued research in microbial strain development will further enhance the economic viability of L-lactic acid production.