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相关概念视频

Synthetic Biology02:55

Synthetic Biology

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Synthetic biology is an interdisciplinary science that involves using principles from disciplines such as engineering, molecular biology, cell biology, and systems biology. It involves remodeling existing organisms from nature or constructing completely new synthetic organisms for applications such as protein or enzyme production, bioremediation, value-added macromolecule production, and the addition of desirable traits to crops, to name a few.
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Biosynthesis in bacteria is a fundamental anabolic process that generates essential macromolecules, including proteins, nucleic acids, lipids, and polysaccharides. These macromolecules are critical for cellular growth, replication, and function. The process is tightly regulated and energetically linked to catabolic pathways to ensure optimal resource utilization.Biosynthetic pathways begin with precursor metabolites such as pyruvate, acetyl-CoA, and glucose-6-phosphate derived from glycolysis,...
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Upstream processing represents a critical phase in biomanufacturing, wherein biological systems such as microorganisms, mammalian cells, or insect cells are cultivated to produce therapeutic proteins, vaccines, enzymes, or other biologically derived products. This phase encompasses all steps from the selection and genetic manipulation of the production organism to the cultivation of cells in bioreactors under tightly controlled environmental conditions.Host Selection and Genetic OptimizationThe...
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Industrial insulin production uses genetically engineered E. coli expressing a proinsulin gene controlled by a tryptophan promoter and containing a methionine linker for later cleavage. The cells also carry ampicillin resistance for selective growth. Seed cultures are stored at −80 °C and production begins by thawing a small amount to inoculate starter cultures, which are progressively scaled to a 50,000-L bioreactor. In the bioreactor, E. coli grow in nutrient-rich media under...
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Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
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Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...
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Light-driven Enzymatic Decarboxylation
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开发用于合成的去保护酶生物催化剂.

Lisa Kennedy1, Mariyah Sajjad1, Michael A Herrera1

  • 1School of Chemistry, University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, UK. Dominic.Campopiano@ed.ac.uk.

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概括
此摘要是机器生成的。

这项研究引入了一种新的生物催化级联,用于从氨基酸中去除保护组. 使用两个酶,这种绿色化学方法为有机合成提供了一种选择性和高效的方法,提高了产量并减少了反应时间.

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科学领域:

  • 生物催化和绿色化学
  • 有机合成和保护组化学 有机合成和保护组化学
  • 酶学和结构生物学 酶学和结构生物学

背景情况:

  • 有机合成经常使用保护组 (PG) 来掩盖功能组 (FG),需要选择性去除步骤.
  • 传统的PG去除通常涉及恶劣的条件,过量的试剂,长反应时间和低产量.
  • 生物催化提供了一种未得到充分利用的方法,使用去保护酶来选择性去除PG,与绿色化学原理保持一致.

研究的目的:

  • 构建和演示一种生物催化级联,用于降低双重保护的氨基酸的保护.
  • 探索使用特定的酶,Bacillus BS2 esterase和Sphingomonas Cbz-ase,用于连续的PG去除.
  • 为参与基质识别和催化所涉及的酶提供结构洞察力.

主要方法:

  • 用各种受N-carbobenzyloxy (Cbz) 保护的氨基酸对Sphingomonas Cbz-ase进行查.
  • 使用Bacillus BS2雌激酶进行O-tert-butyloxycarbonyl (OBu) 降解保护.
  • 将两种酶结合在一个一,两步级联中,去保护CBz-L-Phe OBu到L-Phe.
  • 采用分子对接和结构建模来分析酶活性位点和基质相互作用.

主要成果:

  • 通过顺序的酶级联成功去除双重保护的氨基酸的保护.
  • 在联合系统中证明了Bacillus BS2 esterase和Sphingomonas Cbz-ase的疗效.
  • 通过结构分析确定了BS2酶和Cbz-ase中基质识别和催化的主要残留物.

结论:

  • 开发了一种新的生物催化级联,用于有效和选择性地去除受保护的氨基酸的保护.
  • 这种酶的方法提供了一个更绿色和潜在的更有效的替代传统的化学解毒方法.
  • 这些发现支持进一步探索这种生物催化级联的化学合成中更广泛的应用.