Preprophase band formation and cortical division zone establishment: RanGAP behaves differently from microtubules during their band formation.

ABSTRACT: Correct positioning of the division plane is a prerequisite for plant morphogenesis. The preprophase band (PPB) is a key intracellular structure of division site determination. PPB forms in G2 phase as a broad band of microtubules (MTs) that narrows in prophase and specializes few-micrometer-wide cortical belt region, named the cortical division zone (CDZ), in late prophase. The PPB comprises several molecules, some of which act as MT band organization and others remain in the CDZ marking the correct insertion of the cell plate in telophase. Ran GTPase-activating protein (RanGAP) is accumulated in the CDZ and forms a RanGAP band in prophase. However, little is known about when and how RanGAPs gather in the CDZ, and especially with regard to their relationships to MT band formation. Here, w

SUBMITTER: Yabuuchi T 

PROVIDER: S-EPMC4883843 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature