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Light-driven Molecular Motors on Surfaces for Single Molecular Imaging
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Ion-driven rotary membrane motors: From structure to function.

Freddie J O Martin1, Mònica Santiveri1, Haidai Hu1

  • 1Structural Biology of Molecular Machines Group, Protein Structure & Function Program, Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark.

Current Opinion in Structural Biology
|July 25, 2024
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Summary
This summary is machine-generated.

Ion-driven membrane motors convert ion gradients into rotational energy for vital biological functions. Recent structural studies advance understanding of rotary ATPases and 5:2 motors, revealing insights into their mechanisms and clinical relevance.

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Molecular Motors

Background:

  • Ion-driven membrane motors are crucial molecular machines converting ion gradients into mechanical work.
  • These motors power essential biological processes such as ATP synthesis, transport, and motility.
  • Understanding their structure and mechanism is key to deciphering cellular function.

Purpose of the Study:

  • To review recent structural advances in understanding rotary ATPases and 5:2 motors.
  • To highlight structural insights into clinically relevant mutations of F-type ATP synthases.
  • To explore the diverse roles and mechanistic details of sodium-driven 5:2 motors.

Main Methods:

  • Structural biology techniques, including X-ray crystallography and cryo-electron microscopy.
  • Analysis of high-resolution structures of key ion-driven membrane motors.
  • Integration of structural data with functional and biochemical information.

Main Results:

  • Recent structures of human F-type ATP synthase provide insights into function and disease-related mutations.
  • Structural resolution of ions in a sodium-driven motor elucidates selectivity and torque generation.
  • Advances reveal potential unifying mechanisms for ion selectivity and rotation across different motor types.

Conclusions:

  • Structural insights are rapidly advancing our understanding of ion-driven membrane motors.
  • These motors exhibit conserved principles in ion selectivity and torque generation.
  • Further structural studies will illuminate their roles in complex biological systems and disease.