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相关概念视频

Translational Regulation01:29

Translational Regulation

45
Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...
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Directing Proteins to the Rough Endoplasmic Reticulum01:34

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The organelle-specific signaling sequences direct proteins synthesized in the cytosol to their final destination like ER, mitochondria, peroxisomes, etc. Some of the proteins directed to ER are then trafficked via vesicles to other organelles within the cell or the extracellular environment through the Golgi complex. For example, the rough ER synthesizes soluble proteins for transportation to the lysosomes or secretion out of the cell. It can also synthesize transmembrane proteins that can...
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Peptidoglycan Synthesis01:28

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Structure of PeptidoglycanPeptidoglycan is a vital structural component of the bacterial cell wall, providing mechanical strength and shape to the cell. It consists of repeating units of two sugars—N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM)—linked by β-1,4 glycosidic bonds. These sugar chains are cross-linked by short peptide chains, forming a mesh-like polymer that surrounds the bacterial plasma membrane.Cytoplasmic Phase – Precursor SynthesisPeptidoglycan...
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Coordination of Gene Expression Processes in Bacteria01:29

Coordination of Gene Expression Processes in Bacteria

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The DNA replication, transcription, and translation processes are intricately coupled in bacteria, allowing efficient gene expression and rapid protein synthesis. While this physical and functional coordination is advantageous, it introduces challenges that bacteria overcome through specific regulatory mechanisms.Coupling of Replication, Transcription, and TranslationThe coupling of replication, transcription, and translation is a hallmark of bacterial gene expression. As the replisome unwinds...
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相关实验视频

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Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids
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优化S型非核糖体合成酶的指南

Nadya Abbood1,2, Juliana Effert1, Kenan A J Bozhueyuek1,2,3

  • 1Max-Planck-Institute for Terrestrial Microbiology, Department of Natural Products in Organismic Interactions, 35043 Marburg, Germany.

ACS synthetic biology
|July 31, 2023
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概括

工程化细菌生物合成组装线 (NRPS) 现在可以生产55倍更高产量的人工. 优化合成蛋白相互作用试剂 (SYNZIPs) 提高了合成生物学应用的生产.

关键词:
在NRPS工程方面,NRPS工程生物组合方法是生物组合方法.代优化优化的代优化自然产品是自然产品的产品.非核糖体类的非核糖体.合成生物学 合成生物学

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科学领域:

  • 合成生物学 合成生物学
  • 生物化学 生物化学
  • 自然产品的生物合成.

背景情况:

  • 细菌非核糖体合成酶 (NRPS) 和多基合成酶 (PKS) 合成具有治疗潜力的天然产品.
  • 这些系统的工程设计允许创建新的和多基.

研究的目的:

  • 为高吞吐量库生成引入和优化一种合成NRPS变体 (类型SNRPS).
  • 为了克服工程NRPS系统中的生产产量瓶.

主要方法:

  • 引入了一种简化的S型NRPS变体用于生物组合工程.
  • 来自NRPS的截断合成蛋白相互作用试剂 (SYNZIPs).
  • 嵌入的甘氨酸-氨酸连接剂,以改善域相互作用.

主要成果:

  • 与非优化NRPS相比,生产产量增加了多达55倍.
  • 恢复并超过了野生类型的生产水平.
  • 证明了非核糖体库的成功并行生成.

结论:

  • 优化的S型NRPS能够高效地生产人工非核糖体.
  • 优化SYNZIP工具箱的优化有利于合成生物学,代谢工程和多酶复合工程.