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从老鼠大脑中克隆,表达和基因结构的G蛋白结合的谷氨酸受体
K M Houamed1, J L Kuijper, T L Gilbert
1Department of Physiology and Biophysics, University of Washington School of Medicine, Seattle 98195.
概括
研究人员在老鼠大脑中发现了一种新的G蛋白结合的谷氨酸受体 (GluGR). 这一发现表明一种新的受体亚家族具有独特的进化起源和功能.
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
- 生物化学 生物化学
背景情况:
- G蛋白结合受体 (GPCRs) 是细胞信号分子的关键.
- 谷氨酸受体在突触传输和可塑性中起着至关重要的作用.
- 谷氨酸受体的多样性仍在探索中.
研究的目的:
- 从大鼠大脑中克隆和鉴定一种新的G蛋白结合的谷氨酸受体.
- 为了研究新发现的受体的结构和功能性质,命名为GluGR.
- 确定GluGR.的进化影响和潜在的亚家族分类.
主要方法:
- 在Xenopus卵细胞中补充DNA (cDNA) 的功能表达.
- 氨基酸序列分析以识别结构动机和相似之处.
- 用各种激动剂和抗剂对受体激活和抑制的药理学表征.
- 调查Bordetella pertussis毒素对受体激活的影响.
主要成果:
- 一个cDNA编码一个1199-氨基酸蛋白 (GluGR) 与一个七个跨膜的动机被确定.
- GluGR与已知的GPCRs没有显著的序列相似性,这表明一个潜在的新子家族.
- 内子的存在表明通过外子混合进化.
- GluGR是由奎斯奎拉酸,谷氨酸,伊博酸和转-1-氨基cyclopentyl-1,3-dicarboxylate激活,并由2-氨基-3-phosphonopropionate抑制.
- 受体的激活被Bordetella pertussis毒素所阻断.
结论:
- GluGR代表了一种新的G蛋白结合的谷氨酸受体,可能属于一个新的亚家族.
- 它的独特结构和进化模式 (外因子混合) 提供了对受体进化的洞察力.
- 药理学特征与已知的甲基酸盐受体保持一致,这表明它在调节神经元刺激性方面发挥了作用.
相关概念视频
The Central Dogma
Overview
From DNA to Protein
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Commonly used reporter...
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RNA is the Missing Link Between DNA and Proteins
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G Protein-Coupled Receptors or GPCRs are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to sensory stimuli such as light, odors, hormones, cytokines, or neurotransmitters.
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
Transducer Mechanism: G Protein–Coupled Receptors
G Protein–Coupled Receptors (GPCRs) are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to various stimuli. GPCRs regulate critical physiological pathways and are excellent drug targets for treating diseases such as diabetes, cancer, obesity, depression, or Alzheimer's. Nearly 35% of approved drugs implement their therapeutic effects by selectively interacting with specific GPCRs.
GPCRs are also called heptahelical, 7TM, or...
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