Department of Cell Biology of the Philipps University Marburg; Marburg, Germany; Current Affiliation: Department of Biomolecular Mechanisms; Max-Planck-Institute for Medical Research; Heidelberg, Germany.
Plant Signal Behav. 2013 Oct;8(10). doi: 10.4161/psb.26050.
Complex plastids evolved by secondary endosymbiosis and are, in contrast to primary plastids, surrounded by 3 or 4 envelope membranes. Recently, we provided evidence that in diatoms proteins exist that get N-glycosylated during transport across the outermost membrane of the complex plastid. This gives rise to unique questions on the transport mechanisms of these bulky proteins, which get transported across up to 3 further membranes into the plastid stroma. Here we discuss our results in an evolutionary context and speculate about the existence of plastidal glycoproteins in other organisms with complex plastids.
复杂的质体通过二次内共生进化而来，与原始质体不同，它们被 3 或 4 层膜包围。最近，我们提供了证据表明，在硅藻中存在一些蛋白质，它们在穿过复杂质体最外层膜的运输过程中发生 N-糖基化。这就产生了一个关于这些大型蛋白质运输机制的独特问题，这些蛋白质需要穿过多达 3 层额外的膜进入质体基质。在这里，我们将在进化背景下讨论我们的结果，并推测其他具有复杂质体的生物中是否存在质体糖蛋白。
