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関連する概念動画

Aquaporins01:25

Aquaporins

5.7K
Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
5.7K
Ion Channels01:19

Ion Channels

89.9K
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...
89.9K
The Significance of Membrane Transport01:44

The Significance of Membrane Transport

38.0K
The transport of solutes across the cell membrane is essential for metabolic processes, like maintaining cell size and volume, generating the action potential, exchanging nutrients and gases, etc. Membrane transport can be either passive or active. It can be simple diffusion, facilitated, or mediated transport aided by transport proteins such as transporters and channels.
Transporters facilitate either an active or passive movement of solutes. They can allow a single-molecule transport down its...
38.0K
Pore Transport and Ion-Pair Transport01:17

Pore Transport and Ion-Pair Transport

893
Pore transport and ion-pair formation are critical mechanisms for the absorption and distribution of drugs in the body.
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited  but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
893
Gap Junctions01:27

Gap Junctions

8.8K
The cytoplasm of adjacent animal cells can exchange small molecules, ions, and secondary messengers via the communication channels which form the gap junctions. These junctions comprise a few hundred to thousands of molecular channels, each made of two halves, called the connexon hemichannel. A connexon is a hexamer of six transmembrane connexin proteins, which assemble radially, thus forming a pore or channel in the center. One connexon hemichannel docks with a corresponding connexon on the...
8.8K
Gap Junctions01:37

Gap Junctions

55.9K
Multicellular organisms employ a variety of ways for cells to communicate with each other. Gap junctions are specialized proteins that form pores between neighboring cells in animals, connecting the cytoplasm between the two, and allowing for the exchange of molecules and ions. They are found in a wide range of invertebrate and vertebrate species, mediate numerous functions including cell differentiation and development, and are associated with numerous human diseases, including cardiac and...
55.9K

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関連する実験動画

Updated: Nov 16, 2025

A Proteoliposome-Based Efflux Assay to Determine Single-molecule Properties of Cl- Channels and Transporters
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A Proteoliposome-Based Efflux Assay to Determine Single-molecule Properties of Cl- Channels and Transporters

Published on: April 20, 2015

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水素チャネル - 選択的な水クラスター浸透のための適応経路

Li-Bo Huang1,2, Arthur Hardiagon3,4, Istvan Kocsis2

  • 1Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, People's Republic of China.

Journal of the American Chemical Society
|February 26, 2021
PubMed
まとめ

研究者たちは 効率的なヒドロキシチャネルに 自己組み立てられる人工水道 (AWC) を開発しました これらのチャネルは天然のアクアポリンを模倣し,水淡化技術の有望さを示しています.

さらに関連する動画

Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry
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Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry

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Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution
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Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution

Published on: August 16, 2016

11.9K

関連する実験動画

Last Updated: Nov 16, 2025

A Proteoliposome-Based Efflux Assay to Determine Single-molecule Properties of Cl- Channels and Transporters
07:47

A Proteoliposome-Based Efflux Assay to Determine Single-molecule Properties of Cl- Channels and Transporters

Published on: April 20, 2015

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Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry
12:11

Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry

Published on: April 8, 2020

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Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution
11:55

Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution

Published on: August 16, 2016

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科学分野:

  • 材料科学
  • バイオミメティック・ケミストリー
  • ナノテクノロジー

背景:

  • 人工水道 (AWC) は,選択的な水輸送とイオン排除のために天然のポリンを模倣します.
  • AWCの安定化は,封じ込められた水線/クラスターと反復的なH結合に依存しています.

研究 の 目的:

  • 新しいオクチルウレイドポリオールAWCを報告し,水性ヒドロキシチャネルに自己組み立てます.
  • 水輸送とイオン排斥に対するヘッドグループの変動の影響を調査する.
  • これらのAWCの適応的自己組み立て行動とその水浸透への影響を探求する.

主な方法:

  • 異なるヘッドグループ (エタノール,プロパネジール,トリメタノール) のオクチルウレイドポリオール人工水路の合成
  • 膜内のヒドロキシチャネルを製造し,単一チャネルの水浸透性を測定する.
  • 分子シミュレーションを用いて 積層形成と水路の動態を調べる

主要な成果:

  • アクアポリンに匹敵する2.33 × 10^8の単一チャネル浸透性を達成した.
  • ヒドロキシチャネルで 選択的なイオン排斥が示されています
  • 高濃度で水の浸透が増加し,スポンジ状または円筒状の堆積物が形成される.

結論:

  • オクチルウレイドポリオールの自己組み立ては,水輸送のための効率的なヒドロキシチャネルを作成します.
  • 適応的な自己組み立ては,運河の効率化と水浸透の強化に不可欠です.
  • これらの発見は,海水淡化のための人工的な水路の開発における重要な進歩を表しています.