来自Cupriavidus metallidurans CH34的CopK与Cu (I) 结合在一个四乙烯位点:通过X射线吸收和NMR光谱学进行表征
Géraldine Sarret1, Adrien Favier, Jacques Covès
1Environmental Geochemistry Group, LGIT, UMR 5559, Université Joseph Fourier and CNRS, BP 53, 38041 Grenoble, France.
Journal of the American Chemical Society
|March 3, 2010
概括
铜结合蛋白CopK的结构揭示了它如何结合铜离子. 这种结合导致了显著的形状变化,解释了其合作性铜结合机制.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 微生物学 微生物学
背景情况:
- 库普里亚维杜斯 (Cupriavidus metallidurans) CH34对高度的金属具有抗性.
- 塑pMOL30上的铜集群,包括copK基因,与铜耐药性有关.
- CopK 蛋白与 Cu (I) 和 Cu (II) 合作结合.
研究的目的:
- 确定Cu (I) 结合的CopK的溶液结构.
- 为了描述Cu (I) 的结合部位.
- 为了阐明合作性Cu (I) /Cu (II) 结合的分子机制.
主要方法:
- 在X射线吸收光谱学 (EXAFS) 中.
- 核磁共振 (NMR) 光谱学是指核磁共振的光谱学.
- 解决方案结构的确定 解决方案结构的确定
主要成果:
- 确定了一个由甲氨酸残留物 (M28,M38,M44,M54) 协调的四乙烯Cu (I) 位点.
- 甲氨酸C ((epsilon) 化学转移被提议作为Cu ((I) -thioether结合的敏感探针.
- I) 结合引发了主要的形状变化,破坏了β片并旋转了C端.
- 这种结构变化可能有助于Cu (II) 的结合.
结论:
- 这项研究提供了关于Cu(I) -CopK.的第一个结构洞察力.
- 鉴定的结构重组解释了Cu (I) 和Cu (II) 的合作结合.
- 这项工作为了解细菌中的铜恒温机制提供了分子基础.
相关概念视频
Metal-Ligand Bonds
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Chronic Obstructive Pulmonary Disease-I: Introduction
Chronic Obstructive Pulmonary Disease (COPD) is a long-lasting respiratory condition requiring continuous attention and care. It is a progressive lung disease that leads to breathing challenges due to airflow obstruction. It manifests as persistent respiratory symptoms and restricted airflow resulting from abnormalities in the airways and alveoli, usually due to long-term exposure to harmful particles or gases. COPD mainly consists of two primary conditions: emphysema and chronic bronchitis.
Chronic Obstructive Pulmonary Disease I: Introduction
Chronic obstructive pulmonary disease is a common, preventable, and treatable respiratory disorder characterized by persistent symptoms and progressive airflow limitation. This limitation results from a combination of small-airway disease (obstructive bronchiolitis) and parenchymal destruction (emphysema), both driven by chronic inflammation from exposure to harmful particles or gases.The disease includes two main pathological entities: emphysema, marked by destruction of alveolar walls and...
Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies
Assessing and diagnosing Chronic Obstructive Pulmonary Disease (COPD) involves a detailed approach that includes a comprehensive review of medical history, physical examination, and a variety of diagnostic tests. This thorough evaluation is essential to ensure an accurate diagnosis and guide effective management strategies.
Medical History
Medical History

