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ATP Synthase: Mechanism

ATP Synthase: Mechanism

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 ATP...

ATP Driven Pumps I: An Overview

ATP Driven Pumps I: An Overview

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 are...

ATP Synthase: Structure

ATP Synthase: Structure

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...

ATP Driven Pumps III: V-type Pumps

ATP Driven Pumps III: V-type Pumps

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...

ATP Driven Pumps II: P-type Pumps

ATP Driven Pumps II: P-type Pumps

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...

Mechanical Protein Functions

Mechanical Protein Functions

Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force.

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Related Experiment Video

Updated: May 14, 2026

Measuring In Vitro ATPase Activity for Enzymatic Characterization

Measuring In Vitro ATPase Activity for Enzymatic Characterization

Published on: August 23, 2016

Rotary ATPases: models, machine elements and technical specifications.

Alastair G Stewart¹, Meghna Sobti, Richard P Harvey

¹The Victor Chang Cardiac Research Institute, Faculty of Medicine, The University of New South Wales, Sydney, NSW, Australia.

Bioarchitecture

|February 2, 2013

Summary

This summary is machine-generated.

Rotary ATPases are biological rotary motors essential for energy conversion. Recent studies reveal their architecture, function, and similarities to man-made machines, highlighting the importance of specific lipids for their operation.

Keywords:

A-type ATPase ATP synthase X-ray crystallography biological motors electron microscopy energy conversion rotary motors structural biology vacuolar ATPase

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A Semi-High-Throughput Adaptation of the NADH-Coupled ATPase Assay for Screening Small Molecule Inhibitors

A Semi-High-Throughput Adaptation of the NADH-Coupled ATPase Assay for Screening Small Molecule Inhibitors

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Last Updated: May 14, 2026

Measuring In Vitro ATPase Activity for Enzymatic Characterization

Measuring In Vitro ATPase Activity for Enzymatic Characterization

Published on: August 23, 2016

Visualization of ATP Synthase Dimers in Mitochondria by Electron Cryo-tomography

Visualization of ATP Synthase Dimers in Mitochondria by Electron Cryo-tomography

Published on: September 14, 2014

A Semi-High-Throughput Adaptation of the NADH-Coupled ATPase Assay for Screening Small Molecule Inhibitors

A Semi-High-Throughput Adaptation of the NADH-Coupled ATPase Assay for Screening Small Molecule Inhibitors

Published on: August 17, 2019

Area of Science:

Biochemistry
Molecular Biology
Structural Biology

Background:

Rotary ATPases are crucial molecular machines for biological energy conversion, synthesizing or hydrolyzing adenosine triphosphate.
Understanding their structure and function is key to comprehending cellular energy dynamics.

Purpose of the Study:

To elucidate the general architecture and subunit compositions of F-, V-, and A-type rotary ATPases.
To integrate structural data for a comprehensive understanding of these molecular motors.

Main Methods:

Construction of composite models by fitting high-resolution X-ray structures into low-resolution cryo-electron microscopy densities.
Utilizing electron cryo-tomography for insights into supra-molecular organization.
Employing mass-spectrometry to identify functionally important bound lipids.

Main Results:

Detailed models of intact F-, V-, and A-type ATPases have been generated.
New insights into the arrangement of eukaryotic ATP synthases in mitochondria were obtained.
Essential lipids associated with rotary ATPase function have been identified.

Conclusions:

Rotary ATPases share fundamental design principles with man-made machines.
The function of these nano-scale rotary engines depends on specific molecular components and 'fuel' like lipids.