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Attempts to purify a membrane attached chromoid of bacteriophage lambda
Biochimie
|January 1, 1976
Summary
Researchers isolated bacteriophage gamma DNA using E. coli chromosome methods. Two DNA fractions were found, with one suitable for further analysis due to minimal bacterial DNA contamination.
Area of Science:
- Molecular Biology
- Virology
- Genetics
Background:
- Bacterial chromosome isolation techniques can be adapted for phage DNA.
- Understanding bacteriophage DNA structure is crucial for viral replication studies.
Purpose of the Study:
- To isolate and characterize the native form of bacteriophage gamma chromosome.
- To develop methods for purifying phage DNA from infected host cells.
Main Methods:
- Adaptation of E. coli chromosome isolation methods.
- Sedimentation analysis of lysates from bacteriophage gamma infected cells.
- In vivo DNA synthesis assays.
Main Results:
- Phage DNA separated into two distinct fractions upon sedimentation.
- Both fractions contained membrane-bound phage DNA and supported DNA synthesis.
- A lighter fraction, relatively free of bacterial DNA, was identified and suitable for further analysis.
- Specific phage mutations affected the formation of the lighter fraction.
Conclusions:
- A method for isolating bacteriophage gamma DNA in two distinct fractions was established.
- The lighter DNA fraction is a promising starting material for detailed molecular analysis of bacteriophage gamma DNA.