过多的膜合成驱动了细胞增殖的原始模式
Romain Mercier1, Yoshikazu Kawai, Jeff Errington
1Centre for Bacterial Cell Biology, Institute for Cell and Molecular Biosciences, Medical School, Newcastle University, Richardson Road, Newcastle upon Tyne NE2 4AX, UK.
Cell
|March 5, 2013
概括
细菌可以脱离它们的细胞壁,进入无壁的L形状态,通过膜泡进行分裂. 过多的膜合成或增加的表面积与体积比率推动了这种独特的细菌繁殖.
科学领域:
- 微生物学 微生物学
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
背景情况:
- 糖细胞壁是细菌的一个决定性特征.
- 许多细菌可以反向进入无壁L形状态.
- L-形式的增殖绕过了标准的FtsZ-依赖的分裂路径.
研究的目的:
- 调查驱动L型病毒扩散的机制.
- 为了确定生物物理因素是否影响L型分裂.
- 建立一个研究早期细胞进化的模型.
主要方法:
- 通过突变诱导Bacillus subtilis中的L型分裂.
- 操纵膜合成和表面积与体积的比率.
- 观察细胞形状的变化和细胞分裂过程.
主要成果:
- 导致多余膜合成的突变促进L型分裂.
- 在野生类型原生质中增加表面积与体积的比率会导致类似的分裂.
- L型分裂与膜动力学和生物物理性质有关.
结论:
- 细菌L型分裂可以由简单的生物物理过程驱动,独立于FtsZ.
- 这些发现为早期细胞增殖的演变提供了洞察力.
- L-形式为研究细胞分裂和进化提供了一个模型.
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