孤児受容体GPR158は,メタボトロピックグリシン受容体として機能する:mGlyR
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PubMedで要約を見る
まとめ
この要約は機械生成です。研究者らは,GPR158を新しいメタボトロピックグリシン受容体 (mGlyR) として発見した. この発見により ニューロンの活動に グリシンがどう作用し 認知や感情状態に影響を与えるか 新しいシステムが明らかになりました
科学分野
- 神経科学
- 分子生物学
- 薬理学について
背景
- グリシンは基本的な神経伝達物質です
- グリシンの遅い神経調節作用のためのメタボトロピック受容体は未特定でした.
研究 の 目的
- グリシンのメタボトロピック効果を媒介する孤児Gタンパク質結合受容体を特定する.
- この受容体を通じたグリシンの神経調節のメカニズムを解明する.
主な方法
- Gタンパク質結合受容体 (GPCR) の識別
- グリシンとタウリンを用いたリガンド結合測定法
- 7-Gタンパク質β5 (RGS7-Gβ5) 複合体のGタンパク質シグナルレギュレータの抑制測定
- アデノシン3',5'-モノフォスファート (cAMP) 生産の測定
- 皮質ニューロンの神経刺激性の評価
主要な成果
- GPR158はメタボトロピックグリシン受容体 (mGlyR) として特定されました.
- グリシンとタウリンはGPR158のキャッシュ領域に結合し,RGS7- Gβ5の活性を抑制する.
- mGlyRによるグリシン信号はcAMPの生成を抑制する.
- グリシンはタウリンではなく,mGlyRを通して皮質ニューロンの興奮性を調節する.
結論
- GPR158はメタボトロピックグリシン受容体 (mGlyR) として機能する.
- この発見により 重要な神経調節系が発見されました
- 発見は認知と感情状態の理解に 影響を及ぼします
関連する概念動画
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G-protein coupled receptors are ligand binding receptors that indirectly affect changes in the cell. The actual receptor is a single polypeptide that transverses the cell membrane seven times creating intracellular and extracellular loops. The extracellular loops create a ligand specific pocket which binds to neurotransmitters or hormones. The intracellular loops holds onto the G-protein.
The G-protein or guanine nucleotide-binding protein, is a large heterotrimeric complex. Its three subunits...
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,...
Heterotrimeric G proteins are guanine nucleotide-binding proteins. As the name suggests, heterotrimeric G proteins are composed of three subunits: alpha, beta, and gamma. They remain GDP-bound or GTP-bound inside the cells and switch between inactive/active states. The Gα subunit possesses the nucleotide-binding pocket that binds guanine nucleotides and switches between GDP or GTP-bound states. In contrast, the Gꞵ and Gγ subunits are always bound together with high...
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G protein-coupled receptor (GPCR) signaling plays a crucial role in cell functioning. GPCR desensitization is an equally essential process. It allows cells to respond to changing environments and regain sensitivity to new stimuli while preventing unnecessary stimulation when no longer needed. Prolonged exposure to stimuli leads to GPCR desensitization. It involves blocking the receptors from binding and activating additional G proteins. This inhibits activation of downstream effectors, thereby...