相关实验视频
Updated: Jun 14, 2025

10:34
A High-content Assay for Monitoring AMPA Receptor Trafficking
Published on: January 28, 2019
7.6K
亚单元类型,替代拼接和辅助蛋白对AMPA受体贩运的影响
Tyler Couch1, Tyler W McCullock1, David M MacLean1
1Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, New York, USA.
The Journal of biological chemistry
|May 2, 2025
概括
AMPA受体的贩运主要取决于子单元类型,GluA2的表现优于GluA1. 替代拼接和跨膜AMPA受体调节蛋白 (TARP) 也影响表面表达,提供了对突触传播的见解.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 突触传输是突触传输的过程.
背景情况:
- AMPA受体对于哺乳动物神经系统中的快速激发性突触传递和可塑性至关重要.
- AMPA受体的功能是由子单元组成,RNA编辑,替代拼接和TARP等辅助蛋白调节的.
- 了解这些因素对AMPA受体贩运的相对影响,对于破译突触功能至关重要.
研究的目的:
- 量化评估影响AMPA受体表面贩运的主导因素.
- 为了比较AMPA受体子单元类型 (GluA1与GluA2),替代拼接 (翻转与失败) 和TARP类型对表面表达的影响.
- 为评估AMPA受体贩运动态建立高通量测试.
主要方法:
- 利用两种高通量方法来测量AMPA受体表面表达.
- 系统变化的AMPA受体子单元类型,替代拼接变体和TARP联合表达.
- 在不同的实验条件下量化表面表达水平.
主要成果:
- AMPA受体子单元类型显著影响表面表达,与GluA1相比,GluA2表现出优越的表面存在.
- 替代拼接起到了次要的作用,翻转变种始终显示出比翻转变种更高的表面表达.
- 跨膜AMPA受体调节蛋白 (TARP) 不同地影响表面贩运:1型TARP增强表达,而2型TARP减少.
结论:
- AMPA受体子单元组成是表面贩运的最关键决定因素.
- 替代拼接和TARP相互作用进一步调节AMPA受体表面表达.
- 开发的试验为研究AMPA受体贩运及其在包括疾病在内的各种环境中的变化提供了宝贵的资源.
相关概念视频
Ligand-Gated Ion Channel Receptor: Gating Mechanism
2.2K
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
2.2K
Cooperative Allosteric Transitions
7.9K
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
7.9K
Adrenergic Receptors: ɑ Subtype
1.5K
Adrenoceptors are classified into α and ꞵ classes based on their potencies to catecholamine agonists. α-adrenoceptors show the following order of catecholamine potency:
Adrenaline ≥ Noradrenaline >> Isoprenaline
α-adrenoceptors are further divided into α1 and α2-adrenoceptors.
α1-Adrenoceptors: These receptors are located postsynaptically on the effector organs and cause constriction of smooth muscle mediated by activation of phospholipase...
Adrenaline ≥ Noradrenaline >> Isoprenaline
α-adrenoceptors are further divided into α1 and α2-adrenoceptors.
α1-Adrenoceptors: These receptors are located postsynaptically on the effector organs and cause constriction of smooth muscle mediated by activation of phospholipase...
1.5K
RNA Splicing
56.2K
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
56.2K
Alternative RNA Splicing
21.1K
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
21.1K
Assembly of Signaling Complexes
5.7K
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
5.7K

