相关实验视频

Updated: Sep 17, 2025

Synthesis of Functionalized Magnetic Nanoparticles, Their Conjugation with the Siderophore Feroxamine and its Evaluation for Bacteria Detection

Synthesis of Functionalized Magnetic Nanoparticles, Their Conjugation with the Siderophore Feroxamine and its Evaluation for Bacteria Detection

Published on: June 16, 2020

氧化结合铁和有铁的甲,被封装在水溶液中的环氧德克斯纳米腔中

Atsuki Nakagami¹, Takehiko Tosha², Masaki Horitani^3,4

¹Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe-city, Kyoto610-0321, Japan.

Inorganic chemistry

|June 29, 2025

概括

合成的血红蛋白模型,hemoCD-P和hemoCD-I,通过显示相似的氧化 (NO) 结合,有效地模仿天然的血红蛋白. 这些模型在铁和铁态两种状态下都显示出稳定的NO adducts.

科学领域:

生物模拟化学生物模拟化学
协调化学协调化学
超分子化学超分子化学

背景情况:

血红蛋白是具有复杂铁-氨酸中心的关键生物分子.
开发合成血红蛋白模型对于理解血红蛋白功能至关重要.
需要基于水的模型来复制生物环境.

研究的目的:

为了研究新型合成血红素模型的氧化 (NO) 结合特性.
描述NO附加物在铁和铁态中的稳定性和协调性.
为了比较这些模型的气体结合能力与自然的海姆系统.

主要方法:

合成封装在环极二元体 (hemoCD-P和hemoCD-I) 中的美索-四甲氨酸铁复合体.
光谱技术包括UV-vis,电子磁共振 (EPR) 和共振拉曼光谱.
确定NO和其他气体 (CO,O2,HCN,H2S) 的结合常数.

主要成果:

与hemoCD-P和hemoCD-I一起形成了稳定的铁和铁性NO添加物.
鉴定发现了六坐标铁和五/六坐标铁复合体.
降解性化速率与Fe (II/III) 氧化还原潜力相关;在酸性溶液中形成稳定的铁性NO复合物.
NO 的结合常量 (10^5-6 M^-1 对于Fe(III),10^11-12 M^-1 对于Fe(II)) 与自然的海姆系统可比.

结论:

囊括环德的血红蛋白模型 (hemoCD) 是有效的水性模仿血红蛋白.
这些模型准确地复制了原生血红素在两个氧化状态中的气体结合特性.
这项研究提供了关于血红素与水性介质中小气体分子的基本相互作用的见解.

更多相关视频

Detection of Nitric Oxide and Superoxide Radical Anion by Electron Paramagnetic Resonance Spectroscopy from Cells using Spin Traps

Detection of Nitric Oxide and Superoxide Radical Anion by Electron Paramagnetic Resonance Spectroscopy from Cells using Spin Traps

Published on: August 18, 2012

Encapsulating Cytochrome c in Silica Aerogel Nanoarchitectures without Metal Nanoparticles while Retaining Gas-phase Bioactivity

Encapsulating Cytochrome c in Silica Aerogel Nanoarchitectures without Metal Nanoparticles while Retaining Gas-phase Bioactivity

Published on: March 1, 2016

相关概念视频

Nitric Oxide Signaling Pathway

Nitric Oxide Signaling Pathway

Nitric oxide (NO), an inorganic gas, acts as a potent second messenger in most animal and plant tissues. NO diffuses out of the cells that produce it and enters the neighboring cells to generate a downstream response. NO synthase (NOS) catalyzes NO production by the deamination of the amino acid arginine. There are three isoforms of NOS. Endothelial cells have endothelial NOS (eNOS), nerve and muscle cells have neuronal NOS (nNOS), and macrophages produce inducible NOS (iNOS) upon exposure...