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Related Experiment Videos

Polyethenoadenosine phosphate as a fluorogenic substrate for barnase

P C Fitzgerald1, R W Hartley

  • 1Laboratory of Cellular and Developmental Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892.

Analytical Biochemistry
|November 1, 1993
PubMed
Summary
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Barnase-barstar interaction.

Methods in enzymology·2001

Polyethylene adenosine phosphate is quickly broken down by barnase, causing a significant fluorescence increase. This reaction provides a reliable method for quantitatively measuring barnase enzyme activity.

Area of Science:

  • Biochemistry
  • Enzymology
  • Molecular Biology

Background:

  • Barnase is a ribonuclease enzyme with known catalytic activity.
  • Enzyme assays are crucial for understanding enzyme kinetics and function.
  • Developing sensitive and quantitative assays is essential for biochemical research.

Purpose of the Study:

  • To develop a novel fluorescence-based assay for quantifying barnase activity.
  • To characterize the substrate polyethenoadenosine phosphate for barnase detection.
  • To establish optimal conditions for the barnase assay.

Main Methods:

  • Synthesis and preparation of the polyethenoadenosine phosphate substrate.
  • Hydrolysis of the substrate by barnase enzyme.
  • Monitoring fluorescence increase as a measure of enzyme activity.

Related Experiment Videos

  • Kinetic analysis under specific buffer conditions (pH 8, 0.2 M ammonium acetate).

    • Main Results:

    • Polyethenoadenosine phosphate is rapidly hydrolyzed by barnase.
    • The hydrolysis reaction results in a significant increase in fluorescence.
    • The initial rate of fluorescence increase is directly proportional to barnase concentration.
    • The assay demonstrates quantitative accuracy for barnase activity measurement.

    Conclusions:

    • A novel, sensitive, and quantitative fluorescence assay for barnase activity has been developed.
    • Polyethenoadenosine phosphate serves as an effective substrate for this assay.
    • The assay provides a valuable tool for biochemical and enzymatic studies involving barnase.