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Phage DNA packaging
1Department of Botany, Graduate School of Science, Kyoto University, Japan. hisao.fujisawa@ma1.seikyou.ne.jp
Genes to Cells : Devoted to Molecular & Cellular Mechanisms
|December 31, 1997
Summary
This review details how bacteriophage DNA is packaged into protein shells using terminase enzymes. It explores DNA processing and ATP hydrolysis driving translocation.
Area of Science:
- Molecular biology
- Virology
- Biochemistry
Background:
- Bacteriophage DNA packaging involves translocating DNA into a prohead shell.
- This process utilizes a terminase enzyme complex with distinct subunits.
- DNA translocation is powered by adenosine triphosphate (ATP) hydrolysis.
Purpose of the Study:
- To review the molecular mechanisms of bacteriophage DNA concatemer processing.
- To elucidate the coupling of ATP hydrolysis to DNA translocation during packaging.
Main Methods:
- Literature review of molecular mechanisms.
- Analysis of biochemical activities of terminase enzyme subunits.
- Examination of DNA replication and processing pathways.
Main Results:
- Terminase large subunit possesses ATP-binding, prohead binding, and DNA cleavage functions.
- Terminase small subunit functions as a DNA-binding protein.
- Concatemer processing is coupled to DNA packaging and ATP hydrolysis.
Conclusions:
- Understanding these mechanisms is crucial for bacteriophage assembly.
- The review highlights the intricate interplay between DNA processing and energy-driven translocation.