Related Experiment Video
Updated: Aug 26, 2026

Probing Myosin Ensemble Mechanics in Actin Filament Bundles Using Optical Tweezers
Published on: May 4, 2022
Cooperative effects on the kinetics of ATP hydrolysis in collective molecular motors
1Institute of Theoretical Physics, The Chinese Academy of Sciences, P. O. Box 2735, Beijing 100080, China.
Abstract:
Within the framework of a two-state ratchet model, cooperative effects of collective molecular motors on the kinetics of adenosine triphosphate (ATP) hydrolysis have been studied in detail. We calculate the dependence of the rate of ATP consumption on the applied load. Features different from a single molecular motor have been found. We analyze two typical oscillations of collective molecular motors. The relations between the ATP concentration and oscillatory characteristics, such as frequency, amplitude, and the duty ratio, have been discussed.
Related Concept Videos
ATP Driven Pumps I: An Overview
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: Mechanism
ATP Driven Pumps III: V-type Pumps
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
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
Actin Filament Depolymerization
In F-actin, the ADF/cofilin proteins...

