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Related Experiment Videos

Analyzing the regulation and function of ATM.

Martin F Lavin1, Shaun P Scott, Sergei Kozlov

  • 1The Queensland Cancer Fund Research Unit, The Queensland Institute of Medical Research, Royal Brisbane Hospital, Herston, Australia.

Methods in Molecular Biology (Clifton, N.J.)
|June 29, 2004
PubMed
Summary

Researchers cloned and characterized the ataxia-telangiectasia mutated (ATM) gene. They analyzed its protein kinase activity and identified mutations affecting its function, advancing understanding of DNA damage response.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Ataxia-telangiectasia mutated (ATM) is a crucial kinase involved in DNA damage response.
  • Understanding ATM's function requires methods to express and assay its activity.

Purpose of the Study:

  • To clone and characterize the full-length ataxia-telangiectasia mutated (ATM) cDNA.
  • To analyze ATM protein expression and kinase activity in a cellular model.
  • To identify missense mutations impacting ATM kinase function.

Main Methods:

  • Cloning of full-length ATM cDNA into an inducible EBV-based vector (pMEP4).
  • Stable transfection and analysis of ATM expression via immunoblotting.
  • Immunoprecipitation and kinase assays using p53 substrate or phosphospecific antibodies.

Related Experiment Videos

  • In vitro mutagenesis to detect mutations affecting ATM kinase activity.

    • Main Results:

    • Successful cloning and inducible expression of full-length ATM protein.
    • Demonstration of ATM protein kinase activity in response to irradiation.
    • Identification of missense mutations that alter ATM kinase function.

    Conclusions:

    • The study provides a method for expressing and characterizing functional ATM protein.
    • This work facilitates the study of ATM mutations and their impact on DNA repair pathways.
    • The characterized ATM cDNA and assays are valuable tools for future research in DNA damage and cancer biology.