Grosche Christopher, Rensing Stefan A
Plant Cell Biology, Faculty of Biology, University of Marburg, Karl-von-Frisch-Str. 8, D-35043, Marburg, Germany.
Protoplasma. 2017 Sep;254(5):1879-1885. doi: 10.1007/s00709-017-1096-x. Epub 2017 Mar 3.
Nuclear-encoded plant FtsZ genes are derived from endosymbiotic gene transfer of cyanobacteria-like genes. The green lineage (Chloroplastida) and red lineage (Rhodophyta) feature FtsZ1 and FtsZ2 or FtsZB and FtsZA, respectively, which are involved in plastid division. These two proteins show slight differences and seem to heteropolymerize to build the essential inner plastid division ring. A third gene, encoding FtsZ3, is present in glaucophyte and charophyte algae, as well as in land plants except ferns and angiosperms. This gene was probably present in the last common ancestor of the organisms united by having a primary plastid (Archaeplastida) and was lost during vascular plant evolution as well as in the red and green algae. The presence/absence pattern of FtsZ3 mirrors that of a full set of Mur genes and the peptidoglycan wall encoded by them. Based on these findings, we discuss a role for FtsZ3 in the establishment or maintenance of plastid peptidoglycan shells.
核编码的植物FtsZ基因源自类蓝细菌基因的内共生基因转移。绿色谱系（叶绿体纲）和红色谱系（红藻门）分别具有FtsZ1和FtsZ2或FtsZB和FtsZA，它们参与质体分裂。这两种蛋白质存在细微差异，似乎会异源聚合以构建质体内必不可少的分裂环。第三个基因，编码FtsZ3，存在于灰胞藻和轮藻以及除蕨类植物和被子植物之外的陆地植物中。该基因可能存在于具有原始质体的生物（原始色素体生物）的最后一个共同祖先中，并在维管植物进化过程中以及在红藻和绿藻中丢失。FtsZ3的存在/缺失模式反映了全套Mur基因及其编码的肽聚糖壁的存在/缺失模式。基于这些发现，我们讨论了FtsZ3在质体肽聚糖外壳的建立或维持中的作用。
