{"title":"Coordination of Chloroplast Envelope Division","authors":"G. Bertoni","doi":"10.1105/tpc.108.200913","DOIUrl":null,"url":null,"abstract":"Chloroplasts arose from cyanobacteria and, like cyanobacteria, divide by binary fission. These organelles are surrounded by a double membrane, and their division requires the coordinated action of the inner and outer chloroplast membrane constriction machineries (Miyagishima, 2005; Maple and Moller, 2007; Glynn et al., 2007). Division of the inner membrane is mediated by an internal constricting ring at the stromal surface composed of the tubulin-like FtsZ protein, which arose from the prokaryotic endosymbiont. Similarly, division of the outer membrane involves an external constricting ring on the cytoplasmic surface composed of the dynamin-like ARC5 protein, which was contributed by the eukaryotic host. How constriction of the FtsZ and ARC5 rings is coordinated to achieve the concerted division of the two membranes has been unclear until recently.","PeriodicalId":22905,"journal":{"name":"The Plant Cell Online","volume":"9 1","pages":"2284 - 2284"},"PeriodicalIF":0.0000,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The Plant Cell Online","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1105/tpc.108.200913","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Chloroplasts arose from cyanobacteria and, like cyanobacteria, divide by binary fission. These organelles are surrounded by a double membrane, and their division requires the coordinated action of the inner and outer chloroplast membrane constriction machineries (Miyagishima, 2005; Maple and Moller, 2007; Glynn et al., 2007). Division of the inner membrane is mediated by an internal constricting ring at the stromal surface composed of the tubulin-like FtsZ protein, which arose from the prokaryotic endosymbiont. Similarly, division of the outer membrane involves an external constricting ring on the cytoplasmic surface composed of the dynamin-like ARC5 protein, which was contributed by the eukaryotic host. How constriction of the FtsZ and ARC5 rings is coordinated to achieve the concerted division of the two membranes has been unclear until recently.
叶绿体由蓝藻产生,像蓝藻一样,通过二元裂变分裂。这些细胞器被双层膜包围,它们的分裂需要内外叶绿体膜收缩机制的协调作用(Miyagishima, 2005;Maple and Moller, 2007;Glynn et al., 2007)。内膜的分裂是由间质表面的内收缩环介导的,该环由原核内共生体产生的微管蛋白样FtsZ蛋白组成。同样,外膜的分裂涉及细胞质表面的一个由动力蛋白样ARC5蛋白组成的外收缩环,这是由真核宿主贡献的。直到最近,人们还不清楚FtsZ和ARC5环是如何协调收缩以实现两种膜的协调分裂的。