Regulated trafficking of cellulose synthases

New findings reveal that proteins involved in cellulose biosynthesis undergo regulated trafficking between intracellular compartments and the plasma membrane. The coordinated secretion and internalization of these proteins involve both the actin and cortical microtubule cytoskeletons. This regulated trafficking allows the dynamic remodeling of cellulose synthase complex (CSC) secretion during cell expansion and differentiation. Several new actors of the cellulose synthesis machinery have been recently identified.

Research highlights▶ Plant growth is regulated by ordered deposition of cellulose in the cell wall. ▶ Cellulose synthase complexes migrate through the plasma membrane. ▶ Cortical microtubules control their trajectories, and influence their trafficking. ▶ Much remains to be learned about the molecular interactions involved.