HOOK2 is a member of the Hook protein family. Hook proteins are cytosolic coiled-coil proteins that contain conserved N-terminal domains, which attach to microtubules, and more divergent C-terminal domains, which mediate binding to organelles. HOOK2 localizes to the centrosome through all phases of the cell cycle. Interference with HOOK2 function results in the loss of the radial organization of microtubules suggesting that HOOK2 contributes to the establishment and maintenance of centrosomal structure and function. HOOK2 may contribute to the establishment and maintenance of the pericentrosomal localization of aggresomes by promoting the microtubule-based delivery of protein aggregates to pericentriolar aggresomes.

Cytoplasmic. Note=Associates with discrete punctate structure that correspond to neither early or late endosomes, lysosomes, multivesicular bodies (MVBs), Golgi complex, endoplasmic reticulum, nor mitochondria.