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Published on: April 18, 2016
Boric Acid Disturbs Cell Wall Synthesis in Saccharomyces cerevisiae
Martin Schmidt1, Jaron Z Schaumberg, Courtney M Steen
1Biochemistry and Nutrition, Des Moines University, 3200 Grand Avenue, Des Moines, IA 50312, USA.
Abstract:
Boric acid (BA) has broad antimicrobial activity that makes it a popular treatment for yeast vaginitis in complementary and alternative medicine. In the model yeast S. cerevisiae, BA disturbs the cytoskeleton at the bud neck and impairs the assembly of the septation apparatus. BA treatment causes cells to form irregular septa and leads to the synthesis of irregular cell wall protuberances that extend far into the cytoplasm. The thick, chitin-rich septa that are formed during BA exposure prevent separation of cells after abscission and cause the formation of cell chains and clumps. As a response to the BA insult, cells signal cell wall stress through the Slt2p pathway and increase chitin synthesis, presumably to repair cell wall damage.
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