関連する実験動画
Updated: Jul 13, 2026

07:42
Dissection of Hippocampal Dentate Gyrus from Adult Mouse
Published on: November 17, 2009
ネズミの脳からのGタンパク質結合グルタミン酸受容体のクローン,発現,遺伝子構造
K M Houamed1, J L Kuijper, T L Gilbert
1Department of Physiology and Biophysics, University of Washington School of Medicine, Seattle 98195.
まとめ
研究者らは,ネズミの脳で新しいGタンパク質結合グルタミン酸受容体 (GluGR) を特定した. この発見は,ユニークな進化的起源と機能を持つ新しいサブファミリーの受容体を示唆しています.
科学分野:
- 神経科学は神経科学である.
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
背景:
- Gタンパク質結合受容体 (GPCRs) は,重要な細胞シグナル伝達分子である.
- グルタミン酸受容体は,シナプス伝達と可塑性において重要な役割を果たします.
- グルタミン酸受容体の多様性は,まだ研究中です.
研究 の 目的:
- ネズミの脳から新しいGタンパク質結合グルタミン酸受容体をクローンし,特徴づけること.
- GluGR.と名付けられた,新たに特定された受容体の構造的および機能的性質を調査する.
- GluGR.の進化的影響と潜在的サブファミリー分類を決定する.
主な方法:
- クセノプスの卵細胞における補完DNA (cDNA) の機能的発現.
- 構造的モチーフと類似性を特定するためのアミノ酸配列分析.
- 様々なアゴニストとアンタゴニストを用いた受容体の活性化と抑制の薬理学的特徴.
- ボルデテラ・ペルタッシス毒素が受容体活性化に及ぼす影響の調査.
主要な成果:
- 7つのトランスメブランモチーフを持つ1199アミノ酸タンパク質 (GluGR) をコードするcDNAが特定されました.
- GluGRは,既知のGPCRと有意な配列相似性がなく,潜在的に新しいサブファミリーであることを示しています.
- イントロンの存在は,エクソンシャッフリングによる進化を示唆している.
- GluGRはクイスクアラート,グルタミン酸,イボテネート,トランス-1-アミノcyclopentyl-1,3-dicarboxylateによって活性化され,2-アミノ-3-phosphonopropionateによって抑制されます.
- 受容体の活性化は, Bordetella pertussis toxin.によってブロックされました.
結論:
- GluGRは新しいGタンパク質結合グルタミン酸受容体であり,おそらく新しいサブファミリーに属しています.
- そのユニークな構造と進化パターン (エクソンシャッフリング) は,受容体の進化の洞察を提供します.
- 薬理学的なプロファイルは,既知のメタボトロピックグルタミン酸受容体と一致しており,神経刺激性を調節する役割を示唆しています.
関連する概念動画
The Central Dogma
Overview
From DNA to Protein
The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
Reporter Genes
Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
Commonly used reporter...
Commonly used reporter...
The Central Dogma
The central dogma explains the flow of genetic information from DNA nucleotides to the amino acid sequence of proteins.
RNA is the Missing Link Between DNA and Proteins
In the early 1900s, scientists discovered that DNA stores all the information needed for cellular functions and that proteins perform most of these functions. However, the mechanisms of converting genetic information into functional proteins remained unknown for many years. Initially, it was believed that a single gene is...
RNA is the Missing Link Between DNA and Proteins
In the early 1900s, scientists discovered that DNA stores all the information needed for cellular functions and that proteins perform most of these functions. However, the mechanisms of converting genetic information into functional proteins remained unknown for many years. Initially, it was believed that a single gene is...
G Protein-coupled Receptors
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...
GPCRs are also called heptahelical, 7TM, or...

