人类雌激素受体连接体结合域对androstenediol识别的结构比较
Jordan L Pederick1, John B Bruning1
1Institute for Photonics and Advanced Sensing (IPAS), School of Biological Sciences, The University of Adelaide, Adelaide, South Australia, 5005, Australia.
Molecular and cellular endocrinology
|June 6, 2025
概括
安德二醇与雌激素 (E2) 类似地与雌激素受体 (ERα和ERβ) 结合. 结构分析表明,ERβ选择性源于微妙的口袋差异,但没有观察到明显的结构变化,表明其他因素介于其抗炎作用.
科学领域:
- 分子内分泌学分子内分泌学
- 结构生物学 结构生物学
- 神经免疫学 神经免疫学
背景情况:
- 雌激素受体α (ERα) 和β (ERβ) 是重要的转录因子.
- 安德罗斯二醇是一种雄激素前体,表现出雌激素活性和ERβ选择性.
- 安德罗斯二醇对中枢神经系统 (CNS) 的ERβ依赖性抗炎作用尚未完全理解.
研究的目的:
- 从结构上描述安德罗斯二醇与人类ERα和ERβ的相互作用.
- 阐明安德罗斯二醇ERβ选择性的结构基础.
- 为了确定结构上的差异是否解释了androstenediol独特的抗炎性质.
主要方法:
- 结晶学被用来确定人体ERα和ERβ结合体结合域 (LBDs) 的结构,其复合体与androstenediol和一个协同激活.
- 结构分析的重点是带结合模式和LBDs内部的相互作用.
主要成果:
- 安德罗二醇稳定了ERα和ERβ的活性构造,类似于雌二醇 (E2).
- 安德罗斯二醇在ERα和ERβLBD中的结合方式非常相似.
- 涉及非保存残留物的微妙范德瓦尔斯相互作用可能会赋予ERβ选择性.
- 联合激活剂结合发生在两个受体的AF2表面,与其他激动剂一样.
结论:
- 与E2.2相比,androstenediol不会诱导ERβ的独特结构变化.
- 观察到的结构数据并不能完全解释安德罗二醇在中枢神经系统中的特定抗炎作用.
- 其他非结构性因素可能会调解androstenediol的ERβ依赖性抗炎作用.
相关概念视频
Internal Receptors
71.2K
Many cellular signals are hydrophilic and therefore cannot pass through the plasma membrane. However, small or hydrophobic signaling molecules can cross the hydrophobic core of the plasma membrane and bind to internal, or intracellular, receptors that reside within the cell. Many mammalian steroid hormones use this mechanism of cell signaling, as does nitric oxide (NO) gas.
71.2K
Transducer Mechanism: Nuclear Receptors
1.7K
Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
1.7K
The Two-State Receptor Model
2.5K
The two-state receptor model explains a drug's interaction with receptors, such as G protein-coupled receptors and ligand-gated ion channels, to induce or inhibit a biological response. When no natural ligands are present, a receptor exists in an equilibrium of inactive (Ri) and active (Ra) conformations. The inactive form does not produce a response, while the active form generates a basal effect known as constitutive activity.
The binding affinity of a drug determines its interaction with...
The binding affinity of a drug determines its interaction with...
2.5K
Types of Receptors: Internal Receptors
25.9K
Many cellular signals are hydrophilic and cannot pass through the plasma membrane. However, small or hydrophobic signaling molecules can cross the hydrophobic core of the plasma membrane and bind intracellular receptors that reside within the cell cytoplasm or nucleus. Many mammalian steroid hormones and nitric oxide (NO) gas use this cell signaling mechanism.
Similar to membrane-bound receptors, the binding of a ligand to the intracellular receptor of causes a conformational change in the...
Similar to membrane-bound receptors, the binding of a ligand to the intracellular receptor of causes a conformational change in the...
25.9K
Adrenergic Agonists: Chemistry and Structure-Activity Relationship
3.3K
Adrenergic agonists' structure-activity relationship (SAR) determines their selectivity and efficacy. These agonists comprise a phenylethylamine moiety with an aromatic ring and an ethylamine side chain.
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of...
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of...
3.3K
Intracellular Hormone Receptors
56.3K
Lipid-soluble hormones diffuse across the plasma and nuclear membrane of target cells to bind to their specific intracellular receptors. These receptors act as transcription factors that regulate gene expression and protein synthesis in the target cell
56.3K


