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Enzyme-linked Receptors01:00

Enzyme-linked Receptors

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Enzyme-linked receptors are proteins that act as both receptor and enzyme, activating multiple intracellular signals. This is a large group of receptors that include the receptor tyrosine kinase (RTK) family. Many growth factors and hormones bind to and activate the RTKs.
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
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Enzyme Kinetics01:19

Enzyme Kinetics

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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...
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Updated: Sep 14, 2025

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy
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聚单链纳米颗粒衍生的人工酶.

Yongjia Yang1, Hesong Wang2, Song Hong3

  • 1Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, School of Pharmaceutical Sciences, Capital Medical University, Beijing, 100069, China.

Advanced healthcare materials
|July 24, 2025
PubMed
概括

研究人员使用自折叠的多和金属氧化物纳米集群开发了人工酶. 这些新型生物模拟催化剂表现出类似酶的活性,为氧化应激和炎症提供潜在的治疗应用.

关键词:
人工蛋白质是一种人造蛋白质.酵素酶是一种酶.纳米酶纳米酶是一种纳米酶.这是一种多类聚.超氧化物脱酶的作用

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科学领域:

  • 生物材料科学 生物材料科学
  • 催化剂是一种催化剂.
  • 纳米技术纳米技术

背景情况:

  • 来自N-碳素化物 (NCA) 单体的环开聚合 (ROP) 的聚氨基酸具有可扩展性,但缺乏序列特异性以实现类似酶的功能.
  • 自然酶通过精确的折叠来实现复杂的功能,这种能力在合成多上是有限的.

研究的目的:

  • 设计具有类似酶的活性和受控折叠的人工酶.
  • 为了利用金属氧化物纳米集群作为共酶在一个多框架内.
  • 在炎症疾病模型中研究这些人工酶的治疗潜力.

主要方法:

  • 通过NCA的ROP合成一个triblock共聚 (PEG-b-PGlu-b-P(Glu-EG2)).
  • 使用过渡金属离子 (Fe,Mn,Co,Cu,Zn) 的中央多块的内分子交联.
  • 通过共同沉在聚中形成金属/合金氧化物纳米集群.
  • 结构转变 (α螺旋到β链) 和催化活动 (POD,SOD) 的表征.

主要成果:

  • 成功创建了单链纳米粒子 (SCNPs),其中包含金属氧化物纳米集群的交叉链接的多基域.
  • 已证明金属特异性过氧化酶 (POD) 和超氧化物脱酶 (SOD) 的活性.
  • 含FeOx复合的人工酶 (Fe-酶) 通过减轻氧化应激和炎症,在风湿性关节炎小鼠模型中显示出治疗效果.
  • 人工酶表现出高活性,金属含量低 (<5 wt.%) 和类似蛋白质的二次结构.

结论:

  • 开发了一种创新策略,用于创建具有可调节的催化活动和生物仿真折叠的人工酶.
  • 聚SCNP中的金属氧化物纳米集群有效地作为辅酶.
  • 这些人造酶有望用于针对氧化应激相关疾病的治疗应用.