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RNA ligases.

S Tabor1

  • 1Harvard Medical School, Boston, Massachusetts, USA.

Current Protocols in Molecular Biology
|February 12, 2008
PubMed
Summary
This summary is machine-generated.

T4 RNA ligase, an enzyme from phage gene 63, joins DNA and RNA single-strand termini. It has applications in radioactive labeling, oligonucleotide synthesis, and enhancing DNA ligase activity.

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Area of Science:

  • Molecular Biology
  • Enzymology

Background:

  • T4 RNA ligase is an enzyme encoded by gene 63 of the T4 phage.
  • The enzyme is purified from phage-infected bacterial cells.

Purpose of the Study:

  • To describe the purification and reaction conditions for T4 RNA ligase.
  • To outline various applications of T4 RNA ligase in molecular biology.

Main Methods:

  • Purification of T4 RNA ligase from phage-infected cells.
  • Characterization of the enzyme's catalytic activity in joining nucleic acid termini.
  • Demonstration of applications including labeling, circularization, and ligation.

Main Results:

  • T4 RNA ligase catalyzes ATP-dependent joining of 5'-phosphoryl to 3'-hydroxyl termini of single-stranded DNA or RNA.

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  • Specific reaction conditions for optimal enzyme activity were determined.
  • Successful applications demonstrated include 3' end labeling of RNA, circularization of oligonucleotides, and aiding T4 DNA ligase blunt-end ligation.

    • Conclusions:

    • T4 RNA ligase is a versatile enzyme with significant utility in nucleic acid manipulation.
    • The enzyme facilitates critical steps in molecular biology research and synthetic biology applications.