Nucleosomes: regulators of transcription

Histones and nucleosomes are involved in the folding of DNA in the eukaryotic cell. Recent evidence suggests that they are also involved in a multistep process of DNA unfolding and gene regulation.     

细菌胞外多糖生物合成转录调控因子研究进展

细菌胞外多糖(Exopolysaccharide,EPS)因其独特的理化特性和生理活性,在食品、制药和化工等领域广泛应用。在食品行业中,黄原胶、结冷胶和热凝胶等细菌EPS备受青睐。转录调控因子能在转录水平上调控eps基因的表达,影响细菌EPS的生物合成。目前细菌EPS转录调控因子的研究报道较少,且多数已知的EPS转录因子调控机制尚未阐明。本文总结了近年来细菌EPS调控因子的研究进展,重点介绍其研究方法和调控机制,以期为细菌EPS转录调控研究提供借鉴。     

SAYP: A bridge connecting specific and general transcription regulators

Comment on: Vorobyeva NE, et al. Cell Cycle 2011; 10:1821-7.     

Raf激酶及其活性抑制剂的应用

Raf／MEK／ERK信号转导通路广泛参与了细胞的生长、分化和凋亡等过程,但Raf激酶活化的确切过程尚未阐明。研究发现多种蛋白参与了Raf激酶活性的调节过程,因此,应用Raf激酶的抑制剂或者通过调节影响Raf活性的蛋白可以达到下调Raf活性,抑制细胞增殖的效应。     

Plant cell proliferation and its regulators

Plant growth, where one of the key processes is cell division, is controlled by phytohormones. In this mini-review, an analysis of the literature on the molecular mechanisms controlling plant cell proliferation by phytohormones is presented.