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関連する概念動画

G-Protein Gated Ion Channels01:21

G-Protein Gated Ion Channels

GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory organs,...
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Feedback Regulation of Calcium Concentration

Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
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Calmodulin-dependent Signaling01:16

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Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
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Skeleton and Calcium Homeostasis01:21

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Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.
Ligand-Gated Ion Channel Receptor: Gating Mechanism01:30

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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...
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Updated: Jun 11, 2026

Direct Imaging of ER Calcium with Targeted-Esterase Induced Dye Loading (TED)
09:32

Direct Imaging of ER Calcium with Targeted-Esterase Induced Dye Loading (TED)

Published on: May 7, 2013

カルシウムの入力を制御する.

Colin W Taylor1

  • 1Department of Pharmacology, Tennis Court Road, CB2 1PD, Cambridge, United Kingdom. cwt1000@cam.ac.uk

Cell
|January 16, 2003
PubMed
まとめ
この要約は機械生成です。

カルシウム (Ca2+) は,フォスフォリファーゼC (PLC) 信号伝達によって調節される浸透性チャネルを通って細胞に入ります. PLC,その基質PIP2,シグナリング製品IP3およびダイアシルグリセロルは,これらの重要なCa2+の侵入経路を調整する.

さらに関連する動画

Monitoring ER/SR Calcium Release with the Targeted Ca2+ Sensor CatchER+
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Monitoring ER/SR Calcium Release with the Targeted Ca2+ Sensor CatchER+

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Single-Cell Calcium Imaging for Studying the Activation of Calcium Ion Channels
07:17

Single-Cell Calcium Imaging for Studying the Activation of Calcium Ion Channels

Published on: December 13, 2024

関連する実験動画

Last Updated: Jun 11, 2026

Direct Imaging of ER Calcium with Targeted-Esterase Induced Dye Loading (TED)
09:32

Direct Imaging of ER Calcium with Targeted-Esterase Induced Dye Loading (TED)

Published on: May 7, 2013

Monitoring ER/SR Calcium Release with the Targeted Ca2+ Sensor CatchER+
12:30

Monitoring ER/SR Calcium Release with the Targeted Ca2+ Sensor CatchER+

Published on: May 19, 2017

Single-Cell Calcium Imaging for Studying the Activation of Calcium Ion Channels
07:17

Single-Cell Calcium Imaging for Studying the Activation of Calcium Ion Channels

Published on: December 13, 2024

科学分野:

  • 細胞生物学 細胞生物学
  • 分子シグナル伝達です.
  • イオンチャンネル生理学 イオンチャンネル生理学

背景:

  • カルシウムイオン (Ca2+) は,様々な細胞機能を調節する重要な細胞内伝達物質である.
  • 細胞へのCa2+の侵入は,異なる活性化メカニズムを持つ様々なイオンチャネルを経由して起こります.
  • 受容体媒介のシグナル伝達経路,特にフォスフォリファーゼC (PLC) を含む経路は,Ca2+ホメオスタシスを影響する.

研究 の 目的:

  • Ca2+の侵入経路の調節におけるフォスフォリファーゼC (PLC) 信号伝達の役割を明らかにする.
  • PLC経路の異なるコンポーネントがCa2+チャネル活動をどのように調整するかを調査する.
  • 受容体活性化とCa2+の流入を結びつける分子メカニズムを理解する.

主な方法:

  • Ca2+電流を測定するための電気生理学的記録.
  • 酵素活性と基板レベルを評価するための生化学的測定法.
  • 信号経路の活性化と下流効果を研究するために,細胞ベースのアッセイ.

主要な成果:

  • 多数のCa2+透過チャネルは,PLCを刺激する受容体によって活性化されます.
  • PIP2水解の2つの産物,IP3とダイアシルグリセロルは,Ca2+チャネル活性を調節する.
  • PLCとその基質であるPIP2は,これらのCa2+の侵入経路の調整に不可欠です.

結論:

  • PLCシグナル伝達経路は,Ca2+の入力を制御する中心的な役割を果たします.
  • PLC経路のコンポーネントによるCa2+チャネルの調整された調節は,細胞反応に不可欠です.
  • これらのメカニズムの理解は,細胞信号伝達と潜在的な治療目標の洞察を提供します.