蛋白质表面上的功能组的活性:开发用于蛋白质标记的环氧体探针
Gong Chen1, Alexander Heim, Doris Riether
1Department of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027, USA.
Journal of the American Chemical Society
|July 3, 2003
概括
新的环氧化物亲和力探针提供稳定但有反应性的蛋白质标记. 它们选择性地针对活体场所以外的特定残留物,使复杂的生物样本能够有效地进行标记.
科学领域:
- 化学生物学 化学生物学
- 生物化学 生物化学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 开发选择性蛋白质标记工具对于生物化学和细胞研究至关重要.
- 现有的方法往往缺乏适用于特定应用的稳定性和反应性所需的平衡.
- 环氧化物化学提供了针对性反应的潜力,但需要精心设计.
研究的目的:
- 开发使用环氧化物反应组进行蛋白质标记的新型亲和探针.
- 研究用于蛋白质表面标记的环氧化物功能的独特稳定性和反应性概况.
- 在复杂的生物系统中证明这些探针的有效性和选择性.
主要方法:
- 系统选含有环氧化物化合物作为亲和力探针.
- 环氧探针的合成和应用 9. 环氧探针的合成和应用
- 使用质谱法 (MS) 进行标记的人类碳酸无水酶II (HCA II) 的表征.
- 在简单蛋白质混合物和细胞提取物中测试探针选择性.
主要成果:
- 环氧体探针表现出近距离诱导的反应性,在溶液中稳定,但在蛋白质表面反应.
- 环氧探针9实现了净化HCA II (>90%的产量) 的高效和选择性标签.
- 标签发生在Histidine 64 (His 64) 身上,这是活性部位以外的残留物.
- 探测器9在简单混合物和细胞提取物中展示了HCA II的选择性标记.
结论:
- 以氧化物为基础的亲和探针为选择性蛋白质标记提供了一个有希望的策略.
- 开发的探针具有独特的反应性,适用于向特定的蛋白质残留物.
- 这项工作为化学生物学和蛋白质组学研究提供了宝贵的新工具.
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