Journal of Microbiology

, Volume 57, Issue 12, pp 1041–1047 | Cite as

Construction of a multicopy genomic DNA library and its application for suppression analysis

  • Hongbaek ChoEmail author


Suppression analysis is used for the identification of new genes and genetic interactions when there is a notable phenotype available for genetic selection or screening. A random genomic DNA library constructed on a multi-copy plasmid is a useful tool for suppression analysis when one expects that an overdose of a few genes will suppress the phenotype. These libraries have been successfully used to determine the function of a gene by revealing genes whose functions are related to the gene of interest. They have also been used to identify the targets of chemical or biological agents by increasing the number of unaffected target gene products in a cell. In this article, I will discuss important considerations for constructing multicopy genomic DNA libraries. The protocol provided in this paper should be a useful guide for constructing genomic DNA libraries in many bacterial species for which multi-copy plasmids are available.


genomic DNA multicopy plasmid library construction suppression analysis genetic selection 


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This work was supported by the National Research Foundation of Korea (NRF) Grant (NRF-2019R1A2C1002648).


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Copyright information

© The Microbiological Society of Korea 2019

Authors and Affiliations

  1. 1.Department of Biological Sciences, College of Natural SciencesSungkyunkwan UniversitySuwonRepublic of Korea

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