Braam J, Sistrunk M L, Polisensky D H, Xu W, Purugganan M M, Antosiewicz D M, Campbell P, Johnson K A
Dept of Biochemistry and Cell Biology, Rice Univ., Houston, TX 77055-1892, USA.
Physiol Plant. 1996 Dec;98(4):909-16.
The Arabidopsis TCH genes were discovered as a consequence of their marked upregulation of expression in response to seemingly innocuous stimuli such as touch. Further analyses have indicated that these genes are upregulated by a variety of diverse stimuli. Understanding the mechanism(s) and factors that control TCH gene regulation will shed light on the signaling pathways that enable plants to respond to changing environmental conditions. The TCH proteins include calmodulin, calmodulin-related proteins and a xyloglucan endotransglycosylase. Expression analyses and localization of protein accumulation indicate that the potential sites of TCH protein function include expanding cells and tissues under mechanical strain. We hypothesize that the TCH proteins may collaborate in cell wall biogenesis.
拟南芥TCH基因是在其对诸如触摸等看似无害的刺激作出明显的表达上调反应后被发现的。进一步分析表明，这些基因会被多种不同的刺激上调。了解控制TCH基因调控的机制和因素将有助于揭示使植物能够应对不断变化的环境条件的信号通路。TCH蛋白包括钙调蛋白、钙调蛋白相关蛋白和一种木葡聚糖内转糖基酶。表达分析和蛋白质积累定位表明，TCH蛋白发挥功能的潜在部位包括处于机械应力下正在扩展的细胞和组织。我们推测，TCH蛋白可能在细胞壁生物合成中协同发挥作用。
