Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan.
Trends Plant Sci. 2013 Apr;18(4):227-33. doi: 10.1016/j.tplants.2012.12.002. Epub 2013 Jan 3.
Mechanical stimuli generate Ca(2+) signals and influence growth and development in plants. Recently, candidates for Ca(2+)-permeable mechanosensitive (MS) channels have been identified. These channels are thought to be responsible for sensing osmotic shock, touch, and gravity. One candidate is the MscS-like (MSL) protein family, a homolog of the typical bacterial MS channels. Some of the MSL proteins are localized to plastids to maintain their shape and size. Another candidate is the mid1-complementing activity (MCA) protein family, which is structurally unique to the plant kingdom. MCA proteins are localized in the plasma membrane and are suggested to be involved in mechanosensing and to be functionally related to reactive oxygen species (ROS) signaling. Here, we review their structural features and role in planta.
机械刺激会产生 Ca(2+)信号，并影响植物的生长和发育。最近，已经确定了候选的 Ca(2+)-通透机械敏感 (MS) 通道。这些通道被认为负责感知渗透冲击、触摸和重力。候选者之一是类似于 MscS 的 (MSL) 蛋白家族，是典型的细菌 MS 通道的同源物。一些 MSL 蛋白定位于质体以维持其形状和大小。另一个候选者是 mid1 互补活性 (MCA) 蛋白家族，它在植物王国中具有独特的结构。MCA 蛋白定位于质膜，被认为参与机械感知，并与活性氧 (ROS) 信号有关。在这里，我们回顾了它们的结构特征及其在植物中的作用。
