相关实验视频
Updated: May 27, 2025
08:43
OLIgo Mass Profiling OLIMP of Extracellular Polysaccharides
Published on: June 20, 2010
13.7K
来自Cellulomonas gelida的两个AA10性多糖体单氧化酶的功能性表征
Rosaliina Turunen1, Tina R Tuveng1, Zarah Forsberg1
1Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences (NMBU), Ås, Norway.
Protein science : a publication of the Protein Society
|February 19, 2025
概括
来自Cellulomonas gelida的两种新型性多糖单氧酶 (LPMOs) 显示出独特的纤维素和酸盐降解能力. 这些酶扩大了AA10LPMO家族内已知的催化多样性.
科学领域:
- 生物化学 生化学
- 酶学 是一种酶学.
- 微生物生物技术 微生物生物技术
背景情况:
- 性多糖体单氧化酶 (LPMOs) 是重要的氧化还原酶,可降解性多糖体,如纤维素和.
- 细菌LPMOs,特别是来自AA10家族的LPMOs,在生物质转化和碳循环中发挥着重要作用.
- 了解LPMOs的多样性和催化机制是优化酶体生物质降解的关键.
研究的目的:
- 为了从功能上描述两种LPMOs,CgLPMO10A和CgLPMO10B,来自土壤细菌Cellulomonas gelida.
- 研究这些新型LPMOs的基质特异性和氧化机制.
- 探索AA10家族中的CGLPMO10A和CGLPMO10B独特的生物化学和氧化还原特性.
主要方法:
- 在纤维素和基基板上进行酶净化和活性测定.
- 氧化特性的分析,包括C1和C4碳氧化.
- 确定氧化还原潜力和动力参数 (例如氧化酶活性).
- 基板结合表面变化的结构分析.
主要成果:
- CgLPMO10A对纤维素和素都表现出活性,氧化了C1碳,这是AA10LPMOs的新组合,可能是由于基质结合残留的改变.
- CgLPMO10B对纤维素 (C1和C4氧化) 和素显示出活性,与遗传学预测保持一致.
- CgLPMO10B呈现出异常低的氧化还原潜力和高的氧化酶活性,这是AA10LPMO中记录的最高水平.
- 这两种酶都表现出不同的氧化还原特性,尽管它们来自同一个生物体.
结论:
- 这项研究揭示了来自Cellulomonas gelida的LPMOs的新型催化能力和基质特异性.
- CgLPMO10A是一种独特的AA10LPMO,具有双基质 (纤维素和) 和C1氧化活性.
- CgLPMO10B具有显著的氧化还原特性和广泛的活性,突出显示了细菌LPMOs中的功能多样性.
- 这些发现提高了我们对LPMO机械的理解,并扩大了生物质降解的酶工具包.
更多相关视频
08:31Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition
Published on: October 3, 2018
8.4K
10:10Neutron Crystallography Data Collection and Processing for Modelling Hydrogen Atoms in Protein Structures
Published on: December 1, 2020
4.9K
相关概念视频
01:20Fates of Pyruvate
8.3K
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...
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...
8.3K
01:15Hydrolysis
104.0K
Overview
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
104.0K
01:22Lysosomal Hydrolases
3.7K
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
3.7K
01:15Pyruvate Oxidation
158.1K
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+...
158.1K
01:29Fermentation
113.1K
Most eukaryotic organisms require oxygen to survive and function adequately. Such organisms produce large amounts of energy during aerobic respiration by metabolizing glucose and oxygen into carbon dioxide and water. However, most eukaryotes can generate some energy in the absence of oxygen by anaerobic metabolism.
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
113.1K
01:19Allosteric Proteins-ATCase
5.6K
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...
5.6K