MOSSBAUER STUDIES OF IRON-CONTAINING PROTEINS & ENZYMES

含铁蛋白质的穆斯鲍尔研究

• 批准号: 3072296
• 负责人: Boi-Hanh V. Huynh
• 金额: $ 5.03万
• 依托单位: EMORY UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 1983
• 资助国家: 美国
• 起止时间: 1983-09-01 至 1988-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/3072296
• 关键词: Clostridium; Mossbauer spectrometry; electron spin resonance spectroscopy; electron transport; ferredoxin; hemoprotein; hydrogenase; metalloenzyme; nitrites; nitrogen fixation; nuclear magnetic resonance spectroscopy; oxygen transport; sulfates; sulfides; sulfites

Mossbauer studies are proposed for the following enzymes: (1) hydrogenases from Clostridium pasteurianum W5 and from sulfate-reducing bacteria, (2) nitride reductase from Thiobacillus denitrificans, and (3) sulfite reductases from T. denitrificans and sulfate-reducing bacteria. Hydrogenase is capable of activating molecular hydrogen and many micro-organisms use it to metabolize H2. Understanding the hydrogenase mechanism could be a key step toward catalysis of hydrogen production from water and solar energy, a potentially important alternate energy source. Nitrite reductase reduces nitrite to nitric oxide, while sulfite reductase catalyzes the 6-electron reduction of sulfite to sulfide. These reductions of nitrite and sulfite are, respectively, essential steps in nitrate and sulfate respirations. Despite the importance of these enzyme's biological functions, their prosthetic groups are poorly understood. The proposed studies should reveal physical properties and structural information pertinent to the prosthetic groups of these enzymes; information essential to the understanding of their respective mechanisms. The results will be correlated with EPR, NMR, ENDOR, and optical data, and hopefully will provide a sound experimental basis for detailed physical models of the prosthetic groups.

建议对以下酶进行穆斯堡尔研究：(1)氢酶 来自巴氏梭菌W5和来自硫酸盐还原细菌，(2) 脱氮硫杆菌的氮化物还原酶，和(3)亚硫酸盐 脱氮乳杆菌和硫酸盐还原细菌的还原酶。 氢酶能够激活分子氢和许多 微生物用它来代谢氢气。对氢酶的理解 机制可能是催化产氢的关键一步 水和太阳能，一种潜在的重要替代能源。 亚硝酸盐还原酶将亚硝酸盐还原为一氧化氮，而亚硫酸盐还原酶 催化亚硫酸盐的6电子还原为硫化物。这些削减 亚硝酸盐和亚硫酸盐分别是硝酸盐和亚硫酸盐的基本步骤 硫酸盐呼吸。尽管这些酶的生物重要性 他们的功能，他们的假体基团知之甚少。建议数 研究应该揭示物理性质和结构信息 与这些酶的辅酶基团有关的；基本信息 有助于理解它们各自的机制。结果将是 与EPR、核磁共振、Endor和光学数据相关联，希望将 为详细的物理模型提供可靠的实验基础 假肢小组。