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RecA-like motor ATPases--lessons from structures.

Jiqing Ye1, Andrew R Osborne, Michael Groll

  • 1Department of Cell Biology, Harvard Medical School, HHMI, 240 Longwood Ave., LHRRB 613, Boston, MA 02115, USA.

Biochimica Et Biophysica Acta
|October 30, 2004
PubMed
Summary
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Motor ATPases utilize nucleotide binding and hydrolysis for mechanical work, such as moving macromolecules. Their RecA-like domains are key to this function, revealing molecular movement mechanisms.

Area of Science:

  • Biochemistry
  • Structural Biology
  • Molecular Motors

Background:

  • Many ATPases share a RecA-like structural domain.
  • These enzymes harness nucleotide binding and hydrolysis for mechanical work.
  • Examples include helicases, ABC transporters, clamp loaders, and proteases.

Purpose of the Study:

  • To elucidate the structural basis of mechanical work in RecA-like motor ATPases.
  • To understand how nucleotide binding and hydrolysis drive macromolecule movement.

Main Methods:

  • Structural determination of RecA-like motor ATPases.
  • Analysis of nucleotide binding sites and domain interfaces.
  • Comparison of structures across different ATPase functional states.

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Main Results:

  • RecA-like domains form the core functional units of these motor ATPases.
  • Nucleotide binding occurs at the interface between adjacent RecA-like folds.
  • Relative domain movement is integral to the ATPase cycle and mechanical output.

Conclusions:

  • The conserved RecA-like fold is fundamental to the function of diverse motor ATPases.
  • Understanding these structures reveals the mechanisms by which ATPases move macromolecules.
  • This knowledge advances the study of molecular machines and their biological roles.