Mackey Shannon R, Golden Susan S
Department of Biology, St. Ambrose University, Davenport, IA 52803, USA.
Trends Microbiol. 2007 Sep;15(9):381-8. doi: 10.1016/j.tim.2007.08.005. Epub 2007 Sep 4.
The endogenous circadian clock of the cyanobacterium Synechococcus elongatus controls many cellular processes and confers an adaptive advantage on this organism in a competitive environment. To be advantageous, this internal biological oscillator must be reset daily to remain in synchrony with its environment and to transduce temporal information to control behaviors at appropriate times of day. Recent studies have discovered new components of these input and output pathways of the clock that help to 'wind up' our understanding of the clock system as a whole. Here we review the mechanisms by which S. elongatus maintains internal time, discuss how external stimuli affect this oscillation, and evaluate the mechanisms underlying circadian controlled cellular events.
细长聚球蓝细菌的内源性生物钟控制着许多细胞过程，并在竞争环境中赋予该生物体一种适应性优势。为了具有优势，这个内部生物振荡器必须每天重置，以与环境保持同步，并在一天中的适当时间传递时间信息来控制行为。最近的研究发现了生物钟这些输入和输出途径的新组成部分，这有助于加深我们对整个生物钟系统的理解。在这里，我们回顾了细长聚球蓝细菌维持内部时间的机制，讨论了外部刺激如何影响这种振荡，并评估了昼夜节律控制的细胞事件背后的机制。
