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Related Experiment Videos

ATPase switches controlling DNA replication initiation.

D G Lee1, S P Bell

  • 1Massachusetts General Hospital, Boston, MA 02114, USA.

Current Opinion in Cell Biology
|May 10, 2000
PubMed
Summary
This summary is machine-generated.

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ATP-binding proteins regulate DNA replication initiation. In yeast, origin recognition complex and Cdc6p use ATP binding and hydrolysis as a molecular switch, similar to E. coli factors, controlling replication start.

Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • ATP-binding and hydrolyzing proteins are crucial for DNA replication initiation.
  • Eukaryotic DNA replication involves AAA+ ATPase family members like origin recognition complex and Cdc6p.
  • Bacterial replication initiation factors, such as DnaA and DnaC, are also ATP-dependent.

Purpose of the Study:

  • To investigate the distinct roles of ATP binding and hydrolysis in eukaryotic DNA replication.
  • To compare the ATP-dependent regulation mechanisms between yeast and bacterial replication initiation factors.
  • To elucidate how ATP acts as a molecular switch in coupling replication initiation events.

Main Methods:

  • Comparative analysis of AAA+ ATPase family proteins in Saccharomyces cerevisiae and Escherichia coli.

Related Experiment Videos

  • Biochemical studies on the functions of origin recognition complex and Cdc6p.
  • Investigation of ATP binding and hydrolysis activities in replication initiation factors.

    • Main Results:

    • Origin recognition complex and Cdc6p in yeast exhibit separable roles for ATP binding and hydrolysis.
    • The ATP-dependent regulation of yeast replication proteins shows functional parallels with E. coli DnaA and DnaC.
    • ATP binding and hydrolysis function as a molecular switch, altering protein function and coupling replication events.

    Conclusions:

    • ATP binding and hydrolysis act as a conserved molecular switch in DNA replication initiation across species.
    • This switch mechanism is critical for coordinating key events during the initiation of DNA replication.
    • Understanding this regulation provides insights into the fundamental processes of DNA replication.