中文摘要：

头脑是在 eubacteria ehloroplasts 在部门地点的选择起一个关键作用的无所不在的 ATPase，并且可能 Archaea。在四绿水藻， Mesostigma viride， Nephroselmis olivacea 小球藻粗俗并且 Prototheca wickerhamii， MinDhomologues 被编码为质体染色体。在 Arabidopsis，然而介意编码原子核的、指向叶绿体的蛋白质涉及叶绿体分割，它建议那头脑还在更高的陆地植物被转移了到原子核到在质体期间，进化糟糕仍然是的原子核的从质体的 M/nD 的侧面的基因转移(LGT ) 理解。这里，我们从单细胞的绿水藻 Chlamydomonas reinhardtii 识别了一个编码原子核的头脑相当或相同事物，在绿植物系的基础种。在野类型 E 的 CrMinD 的 Overexpression。coll 禁止了房间分割并且导致了细丝状的房间形成，清楚地在 CrMinD-egfp 的短暂表示证实了的光合的优核质的进化期间表明了头脑蛋白质的保存在质体分割的规定的 CrMinD 蛋白质的角色。寻找土地的所有出版质体 genomic 序列种，没有头脑相当或相同事物被发现，它建议到原子核力量的从质体的 M/nD 的转移发生在陆地植物的进化前。

英文摘要：

MinD is a ubiquitous ATPase that plays a crucial role in selection of the division site in eubacteria, chloroplasts, and probably Archaea. In four green algae, MesosUgma viride, Nephroselmis olivacea, Chlorella vulgaris and Prototheca wickerhamii, MinD homologues are encoded in the plastid genome. However, in Arabidopsis, MinD is a nucleus-encoded, chloroplast-targeted protein involved in chloroplast division, which suggests that MinD has been transferred to the nucleus in higher land plants. Yet the lateral gene transfer （LGT） of MinD from plastid to nucleus during plastid evolution remains poorly understood. Here, we identified a nucleus-encoded MinD homologue from unicellular green alga Chlamydomonas reinhardtii, a basal species in the green plant lineage. Overexpression of CrMinD in wild type E. coil inhibited cell division and resulted in the filamentous cell formation, clearly demonstrated the conservation of the MinD protein during the evolution of photosynthetic eukaryotes. The transient expression of CrMinD-egfp confirmed the role of CrMinD protein in the regulation of plastid division. Searching all the published plastid genomic sequences of land plants, no MinD homologues were found, which suggests that the transfer of MinD from plastid to nucleus might have occurred before the evolution of land plants.