Subcellular Localization and Oligomerization of the Arabidopsis thaliana Somatic Embryogenesis Receptor Kinase 1 Protein
作者:Khalid Shah、Theodorus W.J. Gadella Jr、Harrie van Erp、Valérie Hecht、Sacco C. de Vries
DOI:10.1006/jmbi.2001.4706
日期:2001.6
The Arabidopsis thaliana somatic embryogenesis receptor kinase 1 (AtSERK1) gene is expressed in developing ovules and early embryos. AtSERK1 is also transiently expressed during somatic embryogenesis. The predicted AtSERK1 protein contains an extracellular domain with a leucine zipper motif followed by five leucine-rich repeats, a proline-rich region, a single transmembrane region and an intracellular
拟南芥体细胞胚发生受体激酶1(AtSERK1)基因在发育的胚珠和早期胚胎中表达。AtSERK1在体细胞胚发生过程中也瞬时表达。预测的AtSERK1蛋白包含带有亮氨酸拉链基序的细胞外结构域,其后是五个富含亮氨酸的重复序列,一个富含脯氨酸的区域,一个跨膜区域和一个细胞内激酶结构域。AtSERK1 cDNA与绿色荧光蛋白(GFP)的两个不同变体融合,即发黄光的GFP(YFP)和发蓝光的GFP(CFP),并在植物原生质体和昆虫细胞中瞬时表达。使用共聚焦激光扫描显微镜确定,AtSERK1-YFP融合蛋白靶向植物和动物细胞中的质膜。富含细胞亮氨酸的重复序列 特别是存在于它们上的N-连接的寡糖似乎对于AtSERK1-YFP蛋白的正确定位是必不可少的。通过使用荧光光谱成像显微镜测量YFP / CFP荧光发射率,研究了AtSERK1蛋白的二聚化潜力。如果AtSERK1-CFP和AtSERK1-YFP融合蛋白