RanGAP1 is a continuous marker of the Arabidopsis cell division plane.

ABSTRACT: In higher plants, the plane of cell division is faithfully predicted by the preprophase band (PPB). The PPB, a cortical ring of microtubules and F-actin, disassembles upon nuclear-envelope breakdown. During cytokinesis, the expanding cell plate fuses with the plasma membrane at the cortical division site, the site of the former PPB. The nature of the "molecular memory" that is left behind by the PPB and is proposed to guide the cell plate to the cortical division site is unknown. RanGAP is the GTPase activating protein of the small GTPase Ran, which provides spatial information for nucleocytoplasmic transport and various mitotic processes in animals. Here, we show that, in dividing root cells, Arabidopsis RanGAP1 concentrates at the PPB and remains associated with the cortical division sit

SUBMITTER: Xu XM 

PROVIDER: S-EPMC2587610 | biostudies-literature | 2008 Nov

REPOSITORIES: biostudies-literature