Abstract
Lambda (λ) bacteriophages are viruses that specifically infect bacteria. The genome of λ-phage is a double-stranded DNA molecule approx 50 kb in length (1). In bacterial cells, λ-phage employs one of two pathways of replication: lytic or lysogenic. Commonly, λ-phage vectors replicate via the lytic pathway. During lytic growth, the viral DNA is replicated manifold, a large number of phage gene products are synthesized, and progeny phage particles are assembled. The cell is eventually lysed, releasing its many new infectious virus particles; at this time, plaques will form on an infected bacterial lawn. Its high infectivity and clone-style propagation are the inherent basis for the use of λ-phage as a vector. Moreover, the central third of the viral genome is not essential for lytic growth and, thus, can be replaced by a variety of foreign gene segments. λ-Vectors usually contain multiple cloning sites facilitating the cloning of foreign DNA. In addition, λ-phage vectors have the following advantageous features: high cloning efficiency, a relatively large insert-size capacity, and suitability for screening using nucleic acid probes. In terms of gene screening, genomic DNA libraries are often screened by hybridization using a radioactive nucleic acid probe.
References
Sambrook, J., Fritsch, E. F., and Maniatis, T. (eds.) (1989) Bacteriophage λ vectors, in Molecular Cloning: A Laboratory Manual, Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, pp. 2.3–2.125.
Seed, B., Parker, R. C, and Davidson, N. (1982) Representation of DNA sequences in recombinant DNA library. Gene 19, 201–209.
Wang, Y., Cao, Z., Reid, E. A., et al. (2000) The use of competitive PCR mimic to evaluate a Limulus lambda phage genomic DNA library. Cell. Mol. Neurobiol. 20, 509–520.
Frischauf, A. M., Lahrach, H., Poustka, A., et al. (1983) Lambda replacement vectors carrying polylinker sequences. J. Mol. Biol. 170, 827–842.
Promega Corporation (1996) Protocols and Applications Guide, Promega, Madison, WI.
Moore, D. D. (1997) Overview of genomic DNA libraries, in Short Protocols in Molecular Biology (Ausubel, F., Brent, R., Kingston, R. E., et al. eds.), Wiley, New York, pp. 5.2–5.4.
Klickstein, L. B. (1997) Amplification of a bacteriophage library, in Short Protocols in Molecular Biology (Ausubel, F., Brent, R., Kingston, R. E., et al., eds.), Wiley, New York, pp. 5.5–5.6.
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Wang, Y., Cao, Z., Hood, D., Townsel, J.G. (2003). Construction of Genomic Libraries in λ-Vectors. In: Casali, N., Preston, A. (eds) E. coli Plasmid Vectors. Methods in Molecular Biology™, vol 235. Humana Press. https://doi.org/10.1385/1-59259-409-3:153
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DOI: https://doi.org/10.1385/1-59259-409-3:153
Publisher Name: Humana Press
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Online ISBN: 978-1-59259-409-2
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