カチオン塩化物コトランスポーターNKCC1は,揺れるバンドルメカニズムで動作します
Manuel José Ruiz Munevar1, Valerio Rizzi2, Corinne Portioli3,4
1Laboratory of Molecular Modelling & Drug Discovery, Istituto Italiano di Tecnologia, Via Morego 30, Genoa 16163, Italy.
Journal of the American Chemical Society
|December 26, 2023
まとめ
ナトリウム,カリウム,塩化物コトランスポーター1 (NKCC1) は,その機能に不可欠な構造変化を経験する. これらのダイナミクスは,特定のトランスメブランヘリクスを含め,イオンと水の輸送を調節し,神経学的疾患と癌の新たな治療目標を提供します.
科学分野:
- バイオ物理学
- 分子生物学
- 薬理学について
背景:
- ナトリウム,カリウム,塩化物共輸送体1 (NKCC1) は,細胞膜を横断するイオン輸送に不可欠である.
- 異常なNKCC1活性が神経学的疾患と癌に関与しており,それが重要な治療標的となっている.
研究 の 目的:
- 輸送機能に不可欠なNKCC1の動的形状運動を解明する.
- 潜在的な治療的調節のためのイオンと水の浸透性におけるNKCC1の役割を理解する.
主な方法:
- 膜に埋め込まれたNKCC1のディープラーニング誘導型原子シミュレーション.
- 形状の変化と水浸透性の分析
- 特定された機能的残留物の検証のための変異性実験
主要な成果:
- NKCC1の形状変化に TM4,TM9,TM10が関与する揺らぐバンドルメカニズムを特定した.
- 証明されたNKCC1は,特定の形状転換を経て,水に浸透する状態を有する.
- TM10とTM6の間の重要な螺旋間接触が発見され,機能的には変異性によって検証された.
結論:
- NKCC1の機能は,特定の形状運動,特に揺れるバンドルメカニズムによって調節されます.
- TM10とTM6で確認された保存された残留物は,NKCC1のイオンと水の輸送に不可欠です.
- これらの発見は,NKCC1および関連する共伝達物質を標的とした新しい治療戦略の道を開く.
関連する概念動画
01:55Secondary Active Transport
120.2K
One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme “pump” embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
120.2K
01:29Primary Active Transport
10.3K
In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction they would...
10.3K
01:14Active Transport
720
Active transport is a critical biological process that allows cells to move solutes against an electrochemical gradient. This process requires direct energy input and is characterized by its selectivity, saturability, and susceptibility to competitive inhibition.
Primary active transporters, like Na+, K+ and -ATPase, directly utilize ATP to move ions across the membrane. These transporters play significant roles in various physiological processes. For instance, Na+, K+ and -ATPase maintain...
Primary active transporters, like Na+, K+ and -ATPase, directly utilize ATP to move ions across the membrane. These transporters play significant roles in various physiological processes. For instance, Na+, K+ and -ATPase maintain...
720
01:19Ion Channels
87.0K
The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
87.0K
01:12Clathrin Coated Vesicles
7.0K
Clathrin-coated vesicles use endocytosis to transport receptors and lysosomal hydrolases from the Golgi to the lysosome in the late secretory pathway. Clathrin-mediated endocytosis was the first described endocytic process, and Clathrin-coated vesicles remain one of the most well-studied transport vesicles. The molecular machinery that generates clathrin-coated vesicles comprises over 50 proteins that precisely coordinate vesicle formation. Cell surface receptors concentrated in indented sites...
7.0K
01:26Transport Across the Golgi
4.2K
While it is unclear how molecules move between adjacent Golgi cisternae, it is apparent that the molecules move from cis- cisterna, the entry face, to the trans- cisterna, the exit face. Experiments initially suggested vesicles that bud from one cisterna and fuse with the next cisterna to transport proteins between the cisternae. This vesicular transport model describes the Golgi apparatus as a relatively static structure with a unique enzyme composition in each cisterna. Molecules are...
4.2K