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Related Concept Videos

ATP Driven Pumps III: V-type Pumps01:30

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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.
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ATP Driven Pumps II: P-type Pumps01:34

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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...
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ATP Driven Pumps I: An Overview01:27

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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...
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High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices
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A current-driven nanometer water pump.

Jiaye Su1, Keda Yang

  • 1Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, People's Republic of China.

Nanotechnology
|January 30, 2016
PubMed
Summary
This summary is machine-generated.

Scientists designed a nanometer water pump using molecular dynamics simulations. Ions in a channel create electric current, driving water flow, with different ions showing unique pumping behaviors.

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Area of Science:

  • Nanotechnology
  • Fluid Dynamics
  • Computational Science

Background:

  • Designing efficient nanometer water pumps is crucial for nanotechnology and daily life applications.
  • Existing research explores ion-driven fluid transport, but detailed understanding of ion-specific behaviors is needed.

Purpose of the Study:

  • To design and simulate a nanometer water pump utilizing ion dynamics.
  • To investigate the influence of different ions (sodium and chlorine) on water flux under electric fields.
  • To analyze the power and energy consumption of the designed nanometer pump.

Main Methods:

  • Molecular dynamics simulations were employed to model the nanometer water pump.
  • Simulations involved ions (sodium or chlorine) in a narrow channel subjected to electric fields.
  • Water flux, ion velocity, power, and energy consumption were calculated and analyzed.

Main Results:

  • A nanometer water pump was successfully designed, achieving considerable water flux at accessible field strengths.
  • Sodium ions exhibited an almost linear increase in water flux with field strength.
  • Chlorine ions showed a critical field strength, with flux plateauing before increasing linearly, linked to ion velocity and friction.

Conclusions:

  • The study demonstrates a viable nanometer water pump design with potential for nanofluidic devices.
  • Different ions possess distinct pumping abilities, offering tunable control over fluid transport.
  • The findings provide significant insights connecting ion behavior, friction, and water flux in nanofluidic systems.