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Phasmids as effective and simple tools for construction and analysis of gene libraries
N K Yankovsky1, Fonstein MYu, Lashina SYu
1Institute for Genetics and Selection of Industrial Microorganisms, Moscow, U.S.S.R.
Gene
|September 30, 1989
Summary
A new hybrid vector, lambda pMYF131 (phasmid), efficiently constructs gene libraries in E. coli. This vector simplifies genomic library creation and gene identification through in vitro packaging and plaque selection.
Area of Science:
- Molecular Biology
- Genetics
- Biotechnology
Background:
- Gene library construction is crucial for genomic analysis.
- Existing phage and plasmid vectors have limitations in efficiency and selection.
Purpose of the Study:
- To develop a novel hybrid vector, lambda pMYF131 (phasmid), for enhanced gene library construction.
- To evaluate the efficiency and utility of this new vector system.
Main Methods:
- Construction of the lambda pMYF131 phasmid vector by combining phage lambda and plasmid pUC19.
- Utilizing in vitro packaging and plaque formation for selection of recombinant DNA molecules.
- Cloning DNA fragments using unique restriction sites and assessing insert size capacity.
Main Results:
- Lambda pMYF131 demonstrated high efficiency in constructing gene libraries, yielding 3 x 10^6 recombinant clones per microgram of DNA.
- The vector allows for simplified selection of recombinant DNA through plaque formation.
- It accommodates DNA fragments up to approximately 20 kb and possesses nine unique restriction sites for versatile cloning.
- Successfully used to create libraries for bovine, pig, quail, and bacterial genomes, leading to the identification of 13 genes.
Conclusions:
- The lambda pMYF131 phasmid vector is a highly efficient tool for constructing and analyzing gene libraries.
- Its unique properties simplify library construction procedures and enhance gene discovery.
- This vector system offers significant advantages over traditional phage vectors for genomic research.