Genetically controlled cell lysis in the yeast Saccharomyces cerevisiae

Nianshu Zhang, David C J Gardner, Stephen G. Oliver, Lubomira I. Stateva

    Research output: Contribution to journalArticlepeer-review


    The cell wall of the yeast Saccharomyces cerevisiae is a tough, rigid structure, which presents a significant barrier to the release of native or recombinant proteins from this biotechnologically important organism. There is hence a need to develop inexpensive and efficient methods of lysing yeast cells in order to release their intracellular contents. To develop such a method, a tightly regulated promoter, pMET3, has been used to control three genes involved in cell wall biogenesis: PDE2, SRB1/PSA1, and PKC1. Two of these regulation cassettes, pMET3-SRB1/PSA1 and pMET3-PKC1, have been integrated at the chromosomal loci of the respective genes in order to overcome problems of plasmid instability. Although repression of PDE2 did not cause cell lysis, cells depleted of Srb1p/Psa1p gradually lost their viability and integrity, releasing about 10% of total protein into the medium. Repression of PKC1 led to extensive cell lysis, accompanied by the release of 45% of cellular protein into the medium. A double mutant, carrying both pMET3-SRB1/PSA1 and pMET3-PKC1 cassettes in place of SRB1/PSA1 and PKC1, was constructed and found to permit the efficient release of both homologous and heterologous proteins.
    Original languageEnglish
    Pages (from-to)607-615
    Number of pages8
    JournalBiotechnology and Bioengineering
    Issue number5
    Publication statusPublished - 20 Mar 1999


    • Cell lysis
    • PDE2
    • PKC1
    • Saccharomyces cerevisiae
    • SRB1/PSA1

    Research Beacons, Institutes and Platforms

    • Manchester Institute of Biotechnology


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