Anti-HOOK3 Antibody Picoband®

Protein Hook homolog 3 is a protein that in humans is encoded by the HOOK3 gene. 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. The Drosophila Hook protein is a component of the endocytic compartment.

Highly expressed in chromaffin cells of the adrenal medulla (at protein level) . Detected in peripheral sympathetic ganglia (at protein level) . Found in some paracrine cells in stomach and duodenum (at protein level) .

Probably serves as a target for the spiC protein from Salmonella typhimurium, which inactivates it, leading to a strong alteration in cellular trafficking. Component of the FTS/Hook/FHIP complex (FHF complex) . The FHF complex may function to promote vesicle trafficking and/or fusion via the homotypic vesicular protein sorting complex (the HOPS complex) . May regulate clearance of endocytosed receptors such as MSR1. Participates in defining the architecture and localization of the Golgi complex. Acts as an adapter protein linking the dynein motor complex to various cargos and converts dynein from a non-processive to a highly processive motor in the presence of dynactin. Facilitates the interaction between dynein and dynactin and activates dynein processivity (the ability to move along a microtubule for a long distance without falling off the track) .

1. Urnavicius, L., Lau, C. K., Elshenawy, M. M., Morales-Rios, E., Motz, C., Yildiz, A., Carter, A. P. Cryo-EM shows how dynactin recruits two dyneins for faster movement. Nature 554: 202-206, 2018. 2. Walenta, J. H., Didier, A. J., Liu, X., Kramer, H. The Golgi-associated Hook3 protein is a member of a novel family of microtubule-binding proteins. J. Cell Biol. 152: 923-934, 2001.

Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.