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Closing the gap on DNA ligase

¹Molecular Biology Program, Sloan-Kettering Institute, New York, NY 10021, USA.

Structure (London, England : 1993)

|June 15, 1996

Summary

This summary is machine-generated.

The crystal structure of T7 DNA ligase bound to ATP reveals the catalytic mechanism of nucleotidyl transferases. This finding aids understanding of ATP-dependent DNA ligases and GTP-dependent mRNA capping enzymes.

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Area of Science:

Biochemistry
Structural Biology
Molecular Biology

Background:

Nucleotidyl transferases are essential enzymes involved in DNA and RNA metabolism.
Understanding their catalytic mechanisms is crucial for drug development and molecular biology research.

Purpose of the Study:

To elucidate the mechanism of covalent catalysis employed by ATP-dependent DNA ligases.
To provide structural insights into the broader superfamily of nucleotidyl transferases.

Main Methods:

X-ray crystallography was used to determine the crystal structure of T7 DNA ligase complexed with ATP.

Main Results:

The determined crystal structure reveals key atomic interactions involved in the catalytic process.

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The structure illuminates the covalent catalysis mechanism common to ATP-dependent DNA ligases and related enzymes.

Conclusions:

The study provides a structural basis for understanding the function of T7 DNA ligase.
This work advances the comprehension of nucleotidyl transferase mechanisms, including mRNA capping enzymes.