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相关概念视频

Microbes in Food Production01:29

Microbes in Food Production

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...
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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Biopesticides offer a sustainable alternative to chemical pesticides, utilizing microbial agents to control agricultural pests. Bacillus thuringiensis (Bt) is a widely employed bacterium known for its potent insecticidal activity. Bt biopesticides are favored for their specificity to insect pests, minimal environmental impact, and natural degradability.Mechanism of Bt Toxin Action Bt produces insecticidal crystal (Cry) proteins during its sporulation phase. These proteins form parasporal...

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Updated: May 11, 2026

Genetic Engineering of an Unconventional Yeast for Renewable Biofuel and Biochemical Production
10:10

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Published on: September 20, 2016

在酵母酵母中的利波基因生成.

Michelle F Clasquin1, Eugene Melamud, Alexander Singer

  • 1Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton NJ 08544, USA.

Cell
|June 14, 2011
PubMed
概括
此摘要是机器生成的。

酵母利用核糖生成来从糖解中间体中产生核糖-5-酸盐. 这种新途径是由酶sedoheptulose-1,7-bisphosphatase (SHB17) 识别的,它绕过了NADPH的产生.

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科学领域:

  • 代谢途径 代谢途径
  • 生物化学 生物化学
  • 酵母酵母的新陈代谢

背景情况:

  • 酵母中的葡萄糖代谢通过糖解和氧化酸盐酸盐 (PPP) 途径发生.
  • 氧化PPP产生NADPH和核糖-5-酸盐,对于核酸合成至关重要.
  • 现有的途径不能有效地生产独立于NADPH的核糖-5-酸盐.

研究的目的:

  • 确定和描述一种新的代谢途径,用于酵母中的 рибо-5-酸盐合成.
  • 为了阐明这种新途径的酶步骤和调节,称为 рибо基因生成.
  • 了解在哪些条件下利基因生成优于NADPH生产.

主要方法:

  • 酵母淘汰菌株的代谢分析.
  • 酶活性测定. 酶活性测定.
  • 确定sedoheptulose-1,7-bisphosphatase (SHB17) 的晶体结构.

主要成果:

  • 发现了核糖生成,一种途径,在不产生NADPH的情况下将糖溶性中间体转化为核糖-5-酸盐.
  • 确定sedoheptulose-1,7-bisphosphatase (SHB17) 作为承诺步骤中的关键酶.
  • 对SHB17与其基质,sedoheptulose-1,7-bisphosphate结合的结构分析.
  • 证明SHB17的流量随着高的核糖需求而增加,例如在核糖体生物发生过程中.

结论:

  • 利博基因生成代表了酵母酵母中利-5-酸盐合成的独特途径.
  • SHB17是一种关键的酶,它将sedoheptulose-1,7-bisphosphate致力于riboneogenesis.
  • 这种途径的活性是由对核糖相对于NADPH的相对需求来调节的.