超轻的超快的酶超轻的酶
Xuepei Zhang1, Zhaowei Meng1, Christian M Beusch1
1Division of Chemistry I, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, 17177, Stockholm, Sweden.
Angewandte Chemie (International ed. in English)
|November 27, 2023
概括
同位素耗尽的材料加速细菌生长,提高酶的性能. 超轻酶表现出明显更快的动力学和更好的热稳定性,在快速反应过程中具有潜在的应用.
科学领域:
- 生物化学 生物化学
- 生物物理学的生物物理.
- 微生物学 微生物学
背景情况:
- 无机材料中的重稳定同位素可以改变物理化学性质.
- 以前的研究重点是无机材料,而不是生物系统.
研究的目的:
- 调查同时重同位素 (碳,,氧,) 耗尽对大肠杆菌 (大肠杆菌) 和其表达酶的影响.
- 评估细菌生长的变化,蛋白质的热稳定性和酶动力学.
主要方法:
- 在缺乏重稳定同位素的介质中培养大肠杆菌.
- 测量细菌生长速度.
- 评估细菌蛋白质的热稳定性.
- 确定重组酶的动力参数 (露西法酶,硫素,二叶酸减少酶,Pfu DNA聚合酶).
主要成果:
- 大肠杆菌表现出加速的生长速度.
- 大多数细菌蛋白质都显示出增强的热稳定性.
- 再组合酶的动力学显著加快,在室温下活性增加250%,在10°C时增加50%.
- 特定的酶如化酶,硫素,二叶酸减少酶和Pfu DNA聚合酶表现出明显的改善.
结论:
- 在生物介质中同时耗尽重同位素会对细菌生长和酶功能产生积极影响.
- 加快的酶动力学可能是由于变形和振动的减少.
- 超轻酶为需要极高反应速率的应用提供了潜力.
更多相关视频
相关概念视频
Catalytically Perfect Enzymes
4.0K
The theory of catalytically perfect enzymes was first proposed by W.J. Albery and J. R. Knowles in 1976. These enzymes catalyze biochemical reactions at high-speed. Their catalytic efficiency values range from 108-109 M-1s-1. These enzymes are also called 'diffusion-controlled' as the only rate-limiting step in the catalysis is that of the substrate diffusion into the active site. Examples include triose phosphate isomerase, fumarase, and superoxide dismutase.
Most enzymes...
Most enzymes...
4.0K
Enzymes
81.6K
Inside living organisms, enzymes act as catalysts for many biochemical reactions involved in cellular metabolism. The role of enzymes is to reduce the activation energies of biochemical reactions by forming complexes with its substrates. The lowering of activation energies favor an increase in the rates of biochemical reactions.
Enzyme deficiencies can often translate into life-threatening diseases. For example, a genetic abnormality resulting in the deficiency of the enzyme G6PD...
Enzyme deficiencies can often translate into life-threatening diseases. For example, a genetic abnormality resulting in the deficiency of the enzyme G6PD...
81.6K
Protein Dynamics in Living Cells
2.1K
Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
2.1K


