In complex with KIF18B, constitutes the major microtubule plus-end depolymerizing activity in mitotic cells . Regulates the turnover of microtubules at the kinetochore and functions in chromosome segregation during mitosis . Plays a role in chromosome congression and is required for the lateral to end-on conversion of the chromosome-microtubule attachment .
Subcellular locations: Cytoplasm, Cytoskeleton, Nucleus, Chromosome, Centromere, Chromosome, Centromere, Kinetochore
Associates with the microtubule network at the growing distal tip (the plus-end) of microtubules, probably through interaction with MTUS2/TIP150 and MAPRE1 (By similarity). Association with microtubule plus ends is also mediated by interaction with KIF18B. Centromeric localization requires the presence of BUB1 and SGO2.
Expressed at high levels in thymus and testis, at low levels in small intestine, the mucosal lining of colon, and placenta, and at very low levels in spleen and ovary; expression is not detected in prostate, peripheral blood Leukocytes, heart, brain, lung, liver, skeletal muscle, kidney or pancreas. Isoform 2 is testis-specific.