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The Deletion Of The Bre1 Gene In Aspergillus Nidulans Impairs Mitotic Growth, Meiosis, And Dna Damage Repair, Andrea J. Sitton, Steven W. James
The Deletion Of The Bre1 Gene In Aspergillus Nidulans Impairs Mitotic Growth, Meiosis, And Dna Damage Repair, Andrea J. Sitton, Steven W. James
Student Publications
Bre1 is a homotetrameric E3 ubiquitin-protein ligase that heterodimerizes with Rad6, an E2 ubiquitin-conjugating enzyme, in order to ubiquitinate lysine 123 in Aspergillus nidulans. This post-translational modification promotes methylation of lysines 4 and 79 on histone H3, which are required for certain damage repair pathways and for both optimal mitotic cell growth and meiosis [1-3, 12]. ΔBre1 mutants were generated by exposing protoplasts from strains auxotrophic for pyridoxine to a three-way fusion construct made from the Bre1 5’ and 3’ flanking regions and the Aspergillus fumigatus pyroA gene, which served as a selectable marker. Molecular diagnosis was confirmed via trans-locus …