综述不同微生物的多基酸盐生物合成
Linjing Jia1, Mairui Zhang1, Deepak Kumar2
1Carl and Melinda Helwig Department of Biological and Agricultural Engineering, Kansas State University, Manhattan, KS, 66506, USA.
Chembiochem : a European journal of chemical biology
|September 23, 2025
概括
聚乙酸 (PHB) 是一种可持续的塑料替代品,由微生物从可再生资源生产. 本综述比较了用于PHB生产的各种微生物平台,重点是优化菌株和基板,以实现经济高效,环保的生物塑料.
科学领域:
- 生物技术和合成生物学
- 微生物工程 微生物工程
- 可持续的高分子.
背景情况:
- 聚乙酸 (PHB) 提供了一个可生物降解的替代石油基塑料,对于减轻塑料污染和减少对化石燃料的依赖至关重要.
- 现有的审查往往只关注特定的微生物属或代谢途径,限制了对PHB生产平台的整体理解.
- 对具有成本效益和可扩展的生物工艺的需求对于PHB的广泛采用至关重要.
研究的目的:
- 为生产聚基酸盐 (PHB) 提供各种微生物平台的全面比较分析.
- 强调菌株选择,基因工程和基质利用的策略,特别关注废物利用.
- 评估不同微生物系统在工业规模PHB合成中的优点和局限性.
主要方法:
- 对用于PHB生产的细菌,酵母,真菌,光,光合成和混合微生物培养系统进行比较的审查.
- 对基因工程技术和与提高PHB产量和生产率相关的菌株选择标准的分析.
- 基质灵活性的评估,包括利用废物流进行成本效益高的生物处理.
主要成果:
- 细菌系统显示效率,但需要昂贵的无菌条件;工程酵母/真菌提供工业弹性,但面临代谢障碍.
- Haloarchaea 在非无菌,高盐度条件下提供优势; 光合作用微生物集成二氧化碳捕获,但生长速度较慢.
- 混合微生物培养具有成本效益,使用低成本基质进行非无菌化,尽管生产率优化是关键.
结论:
- 选择适当的微生物平台和优化菌株工程对于推进PHB生产至关重要.
- 探索各种微生物,包括极端动物和混合种植,提高了基质的灵活性和成本效益.
- 技术经济和生命周期评估对于建立PHB作为循环经济的可行,可持续的解决方案至关重要.
相关概念视频
Biosynthesis of Polysaccharides
559
Polysaccharides such as glycogen and starch are synthesized from nucleoside diphosphate sugars, primarily uridine diphosphate glucose (UDPG) and adenosine diphosphate glucose (ADPG). These activated glucose donors act as key intermediates in carbohydrate metabolism and biosynthesis. UDPG primarily involves glycogen synthesis in animals and many bacteria, while ADPG plays a fundamental role in starch synthesis in plants and certain bacteria.UDPG is formed when glucose-1-phosphate reacts with...
559
Biosynthesis in Bacteria
579
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,...
579
Lipid Catabolism
862
Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
862
Biosynthesis of Lipids
532
Microbial membranes exhibit remarkable diversity in lipid composition, reflecting evolutionary adaptations to various environmental conditions. The three domains of life—Bacteria, Archaea, and Eukarya—synthesize membrane lipids through distinct biosynthetic pathways, leading to fundamental structural differences that impact membrane stability, function, and adaptability.Fatty Acid-Based Lipids in Bacteria and EukaryaBacteria and eukaryotes share a common fatty acid biosynthesis...
532
Carbon-dioxide Fixation
648
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
648
Microbial Fermentation
1.3K
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...
1.3K


