Anti-NUP133 Antibody Picoband®

Nuclear pore complex protein Nup133, or Nucleoporin Nup133, is a protein that in humans is encoded by the NUP133 gene. The nuclear envelope creates distinct nuclear and cytoplasmic compartments in eukaryotic cells. It consists of two concentric membranes perforated by nuclear pores, large protein complexes that form aqueous channels to regulate the flow of macromolecules between the nucleus and the cytoplasm. These complexes are composed of at least 100 different polypeptide subunits, many of which belong to the nucleoporin family. The nucleoporin protein encoded by this gene displays evolutionarily conserved interactions with other nucleoporins. This protein, which localizes to both sides of the nuclear pore complex at interphase, remains associated with the complex during mitosis and is targeted at early stages to the reforming nuclear envelope. This protein also localizes to kinetochores of mitotic cells.

Overexpressed in hepatomas and colonic tumors. Also expressed in skeletal muscle, brain, heart, placenta, lung, liver, kidney and pancreas. Expression is elevated in the brain; highly expressed in the Purkinje cell bodies of the cerebellum.

Binds to the plus end of microtubules and regulates microtubule dynamics and microtubule organization. Acts as processive microtubule polymerase. Promotes cytoplasmic microtubule nucleation and elongation. Plays a major role in organizing spindle poles. In spindle formation protects kinetochore microtubules from depolymerization by KIF2C and has an essential role in centrosomal microtubule assembly independently of KIF2C activity. Contributes to centrosome integrity. Acts as component of the TACC3/ch-TOG/clathrin complex proposed to contribute to stabilization of kinetochore fibers of the mitotic spindle by acting as inter-microtubule bridge. The TACC3/ch-TOG/clathrin complex is required for the maintenance of kinetochore fiber tension. Enhances the strength of NDC80 complex-mediated kinetochore-tip microtubule attachments.

1. Belgareh, N., Rabut, G., Bai, S. W., van Overbeek, M., Beaudouin, J., Daigle, N., Zatsepina, O. V., Pasteau, F., Labas, V., Fromont-Racine, M., Ellenberg, J., Doye, V. An evolutionarily conserved NPC subcomplex, which redistributes in part to kinetochores in mammalian cells. J. Cell. Biol. 154: 1147-1160, 2001. 2. Braun, D. A., Lovric, S., Schapiro, D., Schneider, R., Marquez, J., Asif, M., Hussain, M. S., Daga, A., Widneier, E., Rao, J., Ashraf, S., Tan, W., and 46 others. Mutations in multiple components of the nuclear pore complex cause nephrotic syndrome. J. Clin. Invest. 128: 4313-4328, 2018. 3. Fujita, A., Tsukaguchi, H., Koshimizu, E., Nakazato, H., Itoh, K., Kuraoka, S., Komohara, Y., Shiina, M., Nakamura, S., Kitajima, M., Tsurusaki, Y., Miyatake, S., Ogata, K., Iijima, K., Matsumoto, N., Miyake, N. Homozygous splicing mutation in NUP133 causes Galloway-Mowat syndrome. Ann. Neurol. 84: 814-828, 2018. Note: Erratum: Ann. Neurol. 85: 462-463, 2019.

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 freezing and thawing.