一种直接源自内质网的新型囊泡参与水稻胚乳中液泡贮藏蛋白的运输。
A novel vesicle derived directly from endoplasmic reticulum is involved in the transport of vacuolar storage proteins in rice endosperm.
作者信息
Takahashi Hideyuki, Saito Yuhi, Kitagawa Tomoya, Morita Shigeto, Masumura Takehiro, Tanaka Kunisuke
机构信息
Laboratory of Genetic Engineering, Graduate School of Agriculture, Kyoto Prefectural University, Shimogamo, Kyoto, 606-8522 Japan.
出版信息
Plant Cell Physiol. 2005 Jan;46(1):245-9. doi: 10.1093/pcp/pci019. Epub 2005 Jan 19.
We found novel vesicles derived from rough endoplasmic reticulum (ER) in rice endosperm. The novel vesicles had characteristic structures different from that of the ER-derived protein body type I and the Golgi-derived dense vesicles. Immunocytochemical analysis revealed that the novel vesicles are derived directly from the aggregates of vacuolar storage proteins in the rough ER. In addition, BiP, an ER-resident molecular chaperone, was localized in the novel vesicles, but also in protein storage vacuoles (PSVs). These results suggest that the novel vesicles mediate transport of vacuolar storage proteins directly from the ER to PSVs in rice endosperm.
我们在水稻胚乳中发现了源自粗糙内质网（ER）的新型囊泡。这些新型囊泡具有与I型内质网衍生蛋白体和高尔基体衍生致密囊泡不同的特征结构。免疫细胞化学分析表明，新型囊泡直接源自粗糙内质网中液泡储存蛋白的聚集体。此外，内质网驻留分子伴侣BiP不仅定位于新型囊泡中，也定位于蛋白质储存液泡（PSV）中。这些结果表明，新型囊泡介导了水稻胚乳中液泡储存蛋白从内质网直接运输到蛋白质储存液泡的过程。
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