The influence of the microtubule inhibitor, methyl benzimidazol-2-yl carbamate (MBC) on nuclear division and the cell cycle in Saccharomyces cerevisiae

作者：Roy A. Quinlan, C I Pogson, Keith Gull · 发表于：Journal of Cell Science · 年份：1980 · DOI：10.1242/jcs.46.1.341 · 被引用次数：105 · 研究领域：Fungal and yeast genetics research、Microtubule and mitosis dynamics、Biofuel production and bioconversion

Methyl benzimidazol-2-yl-carbamate (MBC), at a concentration of 100 microM, has a pronounced effect on the growth of Saccharomyces cerevisiae, resulting in the accumulation of cells as large doublets. We have determined a specific execution point for the effect of MBC on the yeast cell cycle, and have shown that this execution point is between the cycle events of spindle pole body duplication and spindle pole body separation. An ultrastructural examination of the MBC-treated cells revealed the absence of cytoplasmic and spindle microtubules. MBC treatment also produced an altered spindle pole body morphology, causing the disappearance of the outer component. Nuclear size was also markedly increased in the MBC-induced doublet cells, although the septa were completely absent from these doublet cells. It is proposed that MBC inhibits microtubule polymerization, rather than causing the depolymerization of stable microtubules.