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相关概念视频

ATP Driven Pumps I: An Overview01:27

ATP Driven Pumps I: An Overview

8.3K
ATP-driven pumps, also known as transport ATPases, are integral membrane proteins. They have binding sites for ATP located on the membrane's cytosolic side and the ion-conducting domain in the transmembrane region. These pumps use the free energy released from ATP hydrolysis to move the solutes across cell membranes against an electrochemical gradient.
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
8.3K
ATP Driven Pumps III: V-type Pumps01:30

ATP Driven Pumps III: V-type Pumps

3.8K
V-type pumps are ATP-driven pumps found in the vacuolar membranes of plants, yeast, endosomal and lysosomal membranes of animal cells, plasma membranes of a few specialized eukaryotic cells, and some prokaryotes. They are also known as the V1Vo-ATPase, that couple ATP hydrolysis to transport protons against a concentration gradient.
The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
3.8K
Hydrolysis of ATP01:08

Hydrolysis of ATP

75.9K
The bonds of adenosine triphosphate (ATP) can be broken through the addition of water, releasing one or two phosphate groups in an exergonic process called hydrolysis. This reaction liberates the energy in the bonds for use in the cell—for instance, to synthesize proteins from amino acids.
If one phosphate group is removed, a molecule of ADP—adenosine diphosphate—remains, along with inorganic phosphate. ADP can be further hydrolyzed to AMP—adenosine...
75.9K
ATP Synthase: Structure01:18

ATP Synthase: Structure

12.6K
ATP synthase or ATPase is among the most conserved proteins found in bacteria, mammals, and plants. This enzyme can catalyze a forward reaction in response to the electrochemical gradient, producing ATP from ADP and inorganic phosphate. ATP synthase can also work in a reverse direction by hydrolyzing ATP and generating an electrochemical gradient. Different forms of ATP synthases have evolved special features to meet the specific demands of the cell. Based on their specific feature, ATP...
12.6K
ATP Driven Pumps II: P-type Pumps01:34

ATP Driven Pumps II: P-type Pumps

4.9K
The P-type pumps are a large family of integral membrane transporter ATPases. They are divided into five major types based on substrate specificity, from I to V.
A typical P-type pump has three cytosolic domains: nucleotide-binding (N), phosphorylation (P), and activator (A) domains. These domains are connected to the membrane-spanning helices by short amino acid segments. ATP hydrolysis and covalent phosphoenzyme intermediate formation are crucial parts of the catalytic cycle. At the highly...
4.9K
ATP Synthase: Mechanism01:48

ATP Synthase: Mechanism

14.8K
In animals, the mitochondrial F1F0 ATP synthase is the key protein that synthesizes ATP molecules through a complex catalytic mechanism. While the nuclear genome encodes the majority of ATP synthase subunits, the mitochondrial genome encodes some of the enzyme's most critical components. The formation of this multi-subunit enzyme is a complex multi-step process regulated at the level of transcription, translation, and assembly. Defects in one or more of these steps can result in decreased...
14.8K

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相关实验视频

Updated: Jul 23, 2025

In Vivo Three-Dimensional Two-Photon Microscopy to Study Conducted Vascular Responses by Local ATP Ejection Using a Glass Micro-Pipette
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In Vivo Three-Dimensional Two-Photon Microscopy to Study Conducted Vascular Responses by Local ATP Ejection Using a Glass Micro-Pipette

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微血管网络中的异质ATP模式

Zhe Gou1, Hengdi Zhang1,2, Chaouqi Misbah1

  • 1CNRS, LIPhy, Université Grenoble Alpes, 38000 Grenoble, France.

Journal of the Royal Society, Interface
|July 19, 2023
PubMed
概括

腺三酸盐 (ATP) 作为能量载体和信号分子. 这项研究揭示了血管中复杂的ATP分布模式,受红细胞行为和血管几何学的影响.

科学领域:

  • 生理学 生理学 生理学
  • 生物化学 生物化学
  • 计算生物学 计算生物学

背景情况:

  • 腺三酸盐 (ATP) 对于细胞能量和信号传递至关重要.
  • 异常的血管ATP水平与炎症,缺氧和动脉样硬化等病理有关.

研究的目的:

  • 分析红细胞 (RBC) 释放的ATP和血管网络内的内皮细胞 (EC) 的降解.
  • 研究红细胞相互作用和血管几何学对ATP分布模式的影响.

主要方法:

  • 使用先进的数值方法来模拟ATP动态.
  • 该模型结合了红细胞相互作用和与血管壁的相互作用,以猫间膜为灵感的网络.

主要成果:

  • 观察到异质的ATP分布,在无细胞层的度更高,在分叉附近的峰值更高.
  • 由网络几何学驱动的RBC空间组织,决定了ATP模式.
  • 血和流量强度显著影响ATP水平和异质性.

结论:

  • 这项研究提供了对血管ATP信号模式的基础见解.
  • 了解这些模式对于阐明下游生物化学信号,例如EC中的动态,至关重要.
关键词:
这就是ATPATPATP ATP.内皮细胞是内皮细胞.微循环是一种微循环.红细胞是血液中的红细胞.

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In Vivo Three-Dimensional Two-Photon Microscopy to Study Conducted Vascular Responses by Local ATP Ejection Using a Glass Micro-Pipette
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