气体集群离子束辅助沉积用于制造含有酶和基质的干多层,可按需释放的基质
Benjamin Tomasetti1, Mehdi Lakhdar1, Vincent Delmez1
1Institute of Condensed Matter and Nanosciences─Université catholique de Louvain, Louvain-la-Neuve 1348, Belgium.
ACS applied materials & interfaces
|July 3, 2024
概括
气体集束离子束 (GCIB) 辅助沉积使稳定,多层蛋白质结构成为可能. 这种方法保留了蛋白质活性,并允许在干燥材料中按需进行酶反应.
科学领域:
- 生物材料科学 生物材料科学
- 表面科学是一门学科.
- 蛋白质工程是指蛋白质工程.
背景情况:
- 蛋白质在水溶液中往往缺乏长期稳定性.
- 蛋白质的干燥储存对于样品的保存是可取的.
- 制造功能性的多层蛋白质结构需要精确的沉积技术.
研究的目的:
- 为了研究气体集束离子束 (GCIB) 辅助沉积的有效性,以创建稳定的多层蛋白质结构.
- 评估沉积参数对蛋白质活性和完整性的影响.
- 为了证明功能性的,干燥状态的酶性材料的创建.
主要方法:
- 气体集群离子束 (GCIB) 辅助沉积使用Ar$_{3000-5000}$$^+$集群.
- 序列沉积的,酶,素,葡萄糖氧化酶 (GOx),和胡卜过氧化酶.
- 通过生物测试分析蛋白质活性,通过SDS-PAGE分析完整性.
- 干燥的三层酶材料的制造.
主要成果:
- 成功制造稳定,分离良好的多层.
- 沉积后的蛋白质活性与离子剂量线性成比例.
- 每个原子的能量增加 (E/n) 对酶活性产生负面影响.
- 使用SDS-PAGE和生物测试,对高达80kDa (GOx) 的蛋白质进行完整检测.
- 在干燥的三层材料中展示了按需的酶反应.
结论:
- GCIB辅助沉积是一种多功能技术,用于在真空中构建稳定的多层蛋白质结构.
- 通过控制离子剂量和能量等沉积参数,可以保持和调节蛋白质活性.
- 这种方法有助于创建功能性的干燥状态蛋白质基材料,用于各种应用.
相关概念视频
Detergent Purification of Membrane Proteins
Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
Mass Spectrum
A mass spectrum is the graphical representation of the relative abundance of the charged fragments in an analyte plotted against their mass-to-charge ratio (m/z). The plot's x-axis represents the ratio of the mass of the charged fragment to the number of charges it carries. The y axis of the plot represents the relative abundance of each charged species. The relative abundance is calculated from the signal intensity of each charged species recorded at the detector. The most intense signal (the...
Chemical Ionization (CI) Mass Spectrometry
The molecular ion peak of a molecule in the mass spectrum provides vital information for molecular identification. However, conventional electron impact ionization can lead to the rapid dissociation of some molecular ions before they reach the detector. A milder ionization method is required to increase the lifetime of such ionized analyte molecules. Chemical ionization (CI) is a gas-phase protonation reaction useful for mass-analyzing analyte molecules that are easily protonated to yield the...
Electrospray Ionization (ESI) Mass Spectrometry
Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional electron impact ionization methods. Accordingly, electrospray ionization (ESI) is the favored method for vaporizing and ionizing biomolecules as it circumvents rapid fragmentation and enables the recording of mass signals for the entire biomolecule.
ESI utilizes electrical energy to transfer ions from the liquid phase of the sample into the...
ESI utilizes electrical energy to transfer ions from the liquid phase of the sample into the...
Mass Spectrometers
This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record the characteristic mass spectra. This is achieved via three chief functions:
Matrix-Assisted Laser Desorption Ionization (MALDI)
Matrix-assisted laser desorption ionization (MALDI) is a powerful analytical technique used in mass spectrometry. It enables the identification and characterization of various biomolecules, including proteins, peptides, nucleic acids, and carbohydrates. MALDI is an ionization technique, widely employed in biological and medical research, as well as in fields like pharmacology and biochemistry.The analyte of interest, a biomolecule or a mixture of biomolecules, is mixed with a suitable matrix...


