深度量化基质营业额定义了蛋白酶子站点的合作性
Rajani Kanth Gudipati1,2, Dimos Gaidatzis1,3, Jan Seebacher1
1Friedrich Miescher Institute for Biomedical Research, Fabrikstrasse 24, Basel, 4056, Switzerland.
Molecular systems biology
|October 29, 2024
概括
我们开发了qPISA以定量分析蛋白酶特异性,揭示酶相互作用,并为糖尿病治疗等应用程序实现蛋白质工程.
科学领域:
- 生物化学 生物化学
- 酶学 是一种酶学.
- 蛋白质组学是指蛋白质组学.
背景情况:
- 蛋白酶基质特异性对于生物功能和应用至关重要,但定量数据往往有限.
- 二乙酶四 (DPP4) 是调节血糖水平的关键酶,使其特异性成为一个重要的研究领域.
研究的目的:
- 开发一种定量方法,qPISA (从基质分析得出定量蛋白酶特异性推断),用于分析蛋白酶基质特异性.
- 将qPISA应用于二基化酶四 (DPP4),以了解其活性口袋相互作用并预测活性.
主要方法:
- 利用质谱法从复杂的混合物中量化超过4万个.
- 分析了基质水平的定量变化,以推断蛋白酶活性和特异性.
- 开发了一种序列模式,用于定量预测酶活性.
主要成果:
- qPISA成功地描述了DPP4的特异性,揭示了其活跃口袋中的合作相互作用.
- 为DPP4活动预测得出了一个定量序列模式.
- 基于特异性差异,区分了DPP4与其C.elegans正义体 (DPF-3) 的区别.
- 证明了qPISA在指导蛋白质工程稳定GLP-1,DPP4基质中的实用性.
结论:
- qPISA提供了一种多功能和定量方法,用于分析蛋白酶和外酶的特异性.
- 这种方法提供了对酶机制的洞察力,并有助于生物技术和临床应用,包括糖尿病和肥胖症治疗.
- qPISA促进了针对治疗基质的向蛋白质工程工作.
相关概念视频
Enzyme Kinetics
96.1K
Enzymes speed up reactions by lowering the activation energy of the reactants. The speed at which the enzyme turns reactants into products is called the rate of reaction. Several factors impact the rate of reaction, including the number of available reactants. Enzyme kinetics is the study of how an enzyme changes the rate of a reaction.
Scientists typically study enzyme kinetics with a fixed amount of enzyme in the controlled environment of a test tube. When more reactant, or substrate, is...
Scientists typically study enzyme kinetics with a fixed amount of enzyme in the controlled environment of a test tube. When more reactant, or substrate, is...
96.1K
Turnover Number and Catalytic Efficiency
9.9K
The turnover number of an enzyme is the maximum number of substrate molecules it can transform per unit time. Turnover numbers for most enzymes range from 1 to 1000 molecules per second. Catalase has the known highest turnover number, capable of converting up to 2.8×106 molecules of hydrogen peroxide into water and oxygen per second. Lysozyme has the lowest known turnover number of half a molecule per second.
Chymotrypsin is a pancreatic enzyme that breaks down proteins during digestion....
Chymotrypsin is a pancreatic enzyme that breaks down proteins during digestion....
9.9K
Introduction to Enzyme Kinetics
19.7K
Enzyme kinetics studies the rates of biochemical reactions. Scientists monitor the reaction rates for a particular enzymatic reaction at various substrate concentrations. Additional trials with inhibitors or other molecules that affect the reaction rate may also be performed.
The experimenter can then plot the initial reaction rate or velocity (Vo) of a given trial against the substrate concentration ([S]) to obtain a graph of the reaction properties. For many enzymatic reactions involving a...
The experimenter can then plot the initial reaction rate or velocity (Vo) of a given trial against the substrate concentration ([S]) to obtain a graph of the reaction properties. For many enzymatic reactions involving a...
19.7K
Catalytically Perfect Enzymes
3.9K
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...
3.9K
Enzymes
80.9K
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...
80.9K
Cooperative Allosteric Transitions
7.9K
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
7.9K


