对Ah (二氧化物) 受体活性所需的因子的克隆
E C Hoffman1, H Reyes, F F Chu
1Department of Pathology, University of California, Los Angeles 90024.
研究人员确定了一种关键的87-kDa蛋白质,该蛋白质对化 (Ah) 受体在调解环境污染物影响中的功能至关重要. 这种蛋白质促进Ah受体转移到核中,使其与其他受体区分开来.
科学领域:
- 分子生物学分子生物学
- 环境毒理学环境毒理学
- 生物化学 生物化学
背景情况:
- 亚利碳化合物 (Ah) 受体结合了环境污染物,如二氧化.
- 啊受体激活与这些污染物的致癌作用有关.
- 确切的Ah受体激活和转位的机制仍然不完全理解.
研究的目的:
- 克隆和表征一种新型蛋白质,该蛋白质对于化 (Ah) 受体功能至关重要.
- 阐明该蛋白在Ah受体转位中的作用.
- 将Ah受体的功能要求与其他核受体进行比较.
主要方法:
- 补充DNA (cDNA) 和基因克隆87kDa的人类蛋白质.
- 序列分析以确定保存的图案和与已知的蛋白质相似之处.
- 功能性测试以确定蛋白质在Ah受体转位中的作用.
主要成果:
- 克隆cDNA和部分基因用于Ah受体功能所需的87-kDa人类蛋白质.
- 这种87kDa的蛋白质是从细胞质到细胞核的结Ah受体转移的必要因素.
- 序列分析显示了与Drosophila蛋白质Per和Sim的相似之处,以及一个基本的螺旋环-螺旋环 motif.
结论:
- 一种新的87-kDa蛋白被确定为Ah受体介导信号的关键组成部分.
- 这种蛋白质在核转位中的功能使Ah受体途径与葡萄糖皮质体受体的途径有所区别.
- 鉴定到的蛋白质具有结构动图,表明它具有DNA结合能力,可能在二分化过程中.
更多相关视频
14:39Cholinergic Ligand–dependent Modulation of Oxidative Phosphorylation Coupling in Digitonin-permeabilized BE(2)-C Neuroblastoma Cells
Published on: April 28, 2026
08:00Colorimetric Assessment of Deiodinase 1 Activity in Human Liver Microsomes Using the Sandell-Kolthoff Reaction
Published on: April 10, 2026
相关概念视频
Factors Influencing the Rate of Chemical Reactions
Concentration and Pressure:
The more particles present within a given space, the more likely those particles are to bump into one another.
Drug-Receptor Interactions
Several parameters, such as the drug's affinity for its receptor and its efficacy, which is its ability to activate the receptor, determine the drug's effect on the tissue.
Drug Metabolism: Phase I Reactions
Drug-Receptor Interaction: Agonist
Agonists can bind to receptors in different ways. Some agonists bind directly to the receptor's active site, mimicking the endogenous ligand's action.
Phase I Reactions: Oxidation of Carbon-Heteroatom and Miscellaneous Systems
In carbon-nitrogen systems, aliphatic and aromatic amines can undergo oxidative reactions. Secondary and tertiary amines, like those found in tricyclic antidepressants, can undergo N-dealkylation, a process that involves the oxidation of the alkyl group. In addition, oxidative...
Phase II Reactions: Acetylation Reactions
The substrates for acetylation are typically drugs or their metabolites with an amino, sulfonamide, or hydrazine functional group. Acetylation can occur at several points in the drug molecule, including primary, secondary, and...
