Microtubule Associated Protein RP/EB Family, Member 1 (MAPRE1)

MAPRE1 is a regulator of microtubule dynamics that localizes at both the growing plus ends of microtubules and the centrosome. It is involved in a variety of cellular processes, including establishment and maintenance of cell polarity, search and capture of chromosomes during mitosis, and positioning of the mitotic spindle during asymmetric cell division.

This microtubule localization was abolished in the presence of the microtubule-destabilizing drug nocodazole; upon drug removal, the microtubule distribution of EB1 was recovered and EB1 fluorescence concentrated at the microtubule-organizing center. These results suggested that EB1 is associated with the microtubule network and may be involved in microtubule polymerization and spindle function.