工程基酸脱碳酶用于芳香氨基酸衍生物的受控生物合成
Jian Li1, Shiqing Zhang2, Honghao Li1
1Frontiers Science Center for Synthetic Biology (Ministry of Education), School of Synthetic Biology and Biomanufacturing, Tianjin University, Tianjin, 300072, China; State Key Laboratory of Synthetic Biology, Tianjin University, Tianjin, 300072, China; School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China.
Metabolic engineering
|July 5, 2025
概括
研究人员设计了酵母酵母.
科学领域:
- 生物技术是生物技术.
- 合成生物学 合成生物学
- 酶工程是什么? 酶工程是什么?
背景情况:
- 芳香氨基酸 (AAA) 和它们的衍生物是重要的生物活性化合物.
- ARO10是一种酵母基酸脱碳酶,是AAA衍生物生物合成的关键,但具有广泛的基质特异性.
- 这种广泛的特异性限制了目标化合物的高效生产.
研究的目的:
- 为特定的基板利用设计ARO10.
- 为了增强酵母中有价值的AAA衍生物的新生合成.
- 探索用于可持续化学生产的酶工程策略.
主要方法:
- 采用了一个"设计-构建-测试-学习" (DBTL) 框架来设计ARO10.
- 创建了三种突变,对4-基烯酸 (4-HPP),烯酸 (PPA) 和-3-烯酸 (I3P) 具有增强特异性.
- 利用酶动力学和分子动力学来研究工程机制.
主要成果:
- 在酵母中实现了高产醇 (11.08 g/L),2-乙醇 (2.77 g/L) 和三醇 (1.21 g/L) 的生产.
- 这些代表了迄今为止在酵母中这些化合物的最高报告的de novo标位.
- 在一个5L料批次生物反应器系统中成功应用.
结论:
- 改造的ARO10突变体对关键前体具有特定的基质偏好.
- 该研究展示了酶工程的潜力,以改善AAA衍生物的可持续生物合成.
- 这种方法为生产诸如类化合物及其前体之类的有价值化合物提供了一个有前途的途径.
相关概念视频
Amino Acid Biosynthetic Pathways
150
Amino acid biosynthesis is essential for cell growth, protein synthesis, and metabolic regulation. Cells generate essential and non-essential amino acids from metabolic intermediates to sustain vital biological functions. These intermediates originate from key metabolic pathways: glycolysis, the tricarboxylic acid (TCA) cycle, and the pentose phosphate pathway. Important precursors include α-ketoglutarate, pyruvate, oxaloacetate, phosphoenolpyruvate, and erythrose-4-phosphate, which...
150
Allosteric Proteins-ATCase
5.9K
Binding sites linkages can regulate a protein's function. For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
5.9K
Biosynthesis of Nucleic Acids
190
Nucleic acid biosynthesis is a fundamental biochemical process that produces the purine and pyrimidine nucleotides essential for DNA and RNA synthesis. This pathway maintains a balanced nucleotide pool, preventing imbalances that could jeopardize genetic integrity and cellular function. Given the crucial role of nucleotides, their synthesis is tightly regulated to ensure proper cellular homeostasis.Purine BiosynthesisThe biosynthesis of purine nucleotides begins with ribose-5-phosphate, a...
190
Pyruvate Oxidation
161.8K
After glycolysis, the charged pyruvate molecules enter the mitochondria via active transport and undergo three enzymatic reactions. These reactions ensure that pyruvate can enter the next metabolic pathway so that energy stored in the pyruvate molecules can be harnessed by the cells.
First, the enzyme pyruvate dehydrogenase removes the carboxyl group from pyruvate and releases it as carbon dioxide. The stripped molecule is then oxidized and releases electrons, which are then picked up by NAD+...
First, the enzyme pyruvate dehydrogenase removes the carboxyl group from pyruvate and releases it as carbon dioxide. The stripped molecule is then oxidized and releases electrons, which are then picked up by NAD+...
161.8K
Biosynthesis in Bacteria
113
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,...
113
Loss of Carboxy Group as CO2: Decarboxylation of Malonic Acid Derivatives
2.1K
Just like β-keto acids—which upon thermal decarboxylation form ketones—β-dicarboxylic acids undergo decarboxylation to generate monocarboxylic acids with the liberation of carbon dioxide.
2.1K


