合成氨基酸及其可逆变形的人工细胞内糖解代谢途径的构造
在PubMed上查看摘要
概括
此摘要是机器生成的。研究人员制造出模仿糖解的人工细胞, 产生氨基酸和ATP. 这些人造细胞可以改变形状并恢复正常,为合成生物学中复杂的代谢途径铺平道路.
科学领域
- 合成生物学
- 生物化学
- 蜂工程
背景情况
- 模仿人工细胞中的细胞代谢对于理解生命机制至关重要.
- 恩特纳 - 杜多洛夫通路是古生物中的关键糖解通路.
研究的目的
- 在人造细胞中复制Entner-Doudoroff糖解路径.
- 扩展这种氨基酸合成和ATP生产的途径.
- 研究由代谢活动驱动的人造细胞的动态形状变化.
主要方法
- 使用葡萄糖脱酶 (GDH),葡萄糖酸脱酶 (GAD) 和2 - 基托 - 3 - 脱氧葡萄糖酸酶 (KDGA) 进行糖解路径的复制.
- 用于氨基酸合成的氨酸脱酶 (AlaDH) 的整合.
- 活体线粒体的结合产生ATP并驱动动因子聚合.
- 使用甲基纤维素来影响活性丝组织和细胞形态.
- 使用激光照射触发的行为脱聚合和形状的反转.
主要成果
- 通过恩特纳-杜多洛夫途径将葡萄糖转化为酸盐的成功复制.
- 酸盐被进一步代谢为氨酸,并用于刺激共同培养的线粒体中的ATP产生.
- 通过新陈代谢驱动的活性聚合导致人造细胞从球形变形为螺旋形状.
- 激光诱导的活性纤维脱聚化恢复了人工细胞的球形.
结论
- 这项研究证明了人工细胞中复杂的代谢途径,包括糖解和氨基酸合成的成功工程.
- 实现了代谢控制的动态形状变化,突出了功能仿真的潜力.
- 这项工作为构建具有先进生物功能的更复杂的人工细胞提供了基础.
相关概念视频
In cellular metabolism (the complete breakdown of glucose to extract energy), glycolysis is the first step. Glycolysis takes place in the cytoplasm of both prokaryotic and eukaryotic cells. Glucose enters heterotrophic cells in two ways. One method is through secondary active transport, where the transport takes place against the glucose concentration gradient. The other mechanism uses a group of integral proteins called GLUT proteins, also known as glucose transporter proteins. These...
Overview
Cells make energy by breaking down macromolecules. Cellular respiration is the biochemical process that converts "food energy" (from the chemical bonds of macromolecules) into chemical energy in the form of adenosine triphosphate (ATP). The first step of this tightly regulated and intricate process is glycolysis. The word glycolysis originates from the Latin glyco (sugar) and lysis (breakdown). Glycolysis serves two main intracellular functions: generating ATP and generating...
So far, glycolysis has cost the cell two ATP molecules and produced two small, three-carbon sugar molecules. These molecules will proceed through the second half of the pathway, and sufficient energy will be extracted to pay back the two ATP molecules used as an initial investment and produce a profit for the cell of two additional ATP molecules and two even higher-energy NADH molecules.
Step 1 - 5: Glycolysis Preparatory Phase
The first phase of glycolysis has 5 steps where the glucose is...
Glucose is the source of nearly all energy used by organisms. The first step of converting glucose into usable energy is called glycolysis. Glycolysis occurs in the cytosol of the cell over two phases: an energy-requiring phase and an energy-releasing phase. Over the first three steps, glucose is converted into different forms and attached to two phosphate groups donated by two ATP molecules, resulting in an unstable sugar. In the next two stages, the unstable sugar splits into two sugar...
Pyruvate is the end product of glycolysis, where glucose is oxidized to pyruvate, simultaneously reducing NAD+ to NADH. Two molecules of ATP are also produced by substrate-level phosphorylation.
In aerobic organisms, pyruvate is metabolized via the citric acid cycle to produce reduced coenzymes NADH and FADH2. These coenzymes are then oxidized in the electron transport chain to produce ATP and, in the process, regenerate the NAD+ and FAD. As seen in some cell types and organisms, fermentation...
Nearly all the energy used by cells comes from the bonds that make up complex organic compounds. These organic compounds are broken down into simpler molecules, such as glucose. As a result, cells extract energy from glucose over many chemical reactions—a process called cellular respiration.
Cellular respiration can occur aerobically (with oxygen) or anaerobically (without oxygen). In the presence of oxygen, cellular respiration starts with glycolysis and continues with pyruvate...

