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  • Title: Disruption of the MNN10 gene enhances protein secretion in Kluyveromyces lactis and Saccharomyces cerevisiae.
    Author: Bartkeviciūte D, Sasnauskas K.
    Journal: FEMS Yeast Res; 2004 Sep; 4(8):833-40. PubMed ID: 15450190.
    Abstract:
    Screening for genes affecting super-secreting phenotype of the over-secreting mutant of Kluyveromyces lactis resulted in isolation of the gene named KlMNN10, sharing high homology with Saccharomyces cerevisiae MNN10. The disruption of the KlMNN10 in Kluyveromyces lactis, as well as of MNN10 and MNN11 in Saccharomyces cerevisiae, conferred the super-secreting phenotype. MNN10 isolated from Saccharomyces cerevisiae suppressed the super-secretion phenotype in Kluyveromyces lactis klmnn10, as did the homologous KlMNN10. The genes MNN10 and MNN11 of Saccharomyces cerevisiae encode mannosyltransferases responsible for the majority of the alpha-1,6-polymerizing activity of the mannosyltransferase complex. These data agree with the view that the structure of glycoproteins in a yeast cell wall strongly influences the release of homologous and heterologous proteins in the medium. The set of genes namely the suppressors of the over-secreting phenotype, could be attractive for further analysis of gene functions, over-secreting mechanisms and for construction of new strains optimized for heterologous protein secretion. KlMNN10 has EMBL accession no. AJ575132.
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