Microtubular Organization in Tobacco Cells: Heat-Shock Protein 90 can Bind to Tubulin in Vitro
نویسنده
چکیده
The heat-shock protein 90 (HSP90) from tobacco VBIo cells specifically binds to nitrocellulose that had been coated with polymerized microtubules or tubulin dimers. HSP90 is expressed preferentially during cell division and becomes downregulated during cell elongation. HSP90 cofractionates with tubulin dimers during affinity chromatography with sepharose coupled to the tubulin-binding drug ethyl N-phenylcarbamate (EPC). Binding of HSP90 to EPC-sepharose depends on the presence of tubulin. Antibodies against tubulin and HSP90 irnmunoadsorb HSP90 and tubulin, respectively, These results demonstrate that HSP90 behaves as a microtubule-binding protein in vitro.
منابع مشابه
In Silico Screening Studies on Methanesulfonamide Derivatives as Dual Hsp27 and Tubulin Inhibitors Using QSAR and Molecular Docking
The expression of heat shock protein 27 (Hsp27) as a chaperone protein, is increased in response to various stress stimuli such as anticancer chemotherapy. This phenomenon can lead to survive of the cells and causes drug resistance. In this study, a series of methanesulfonamide derivatives as dual Hsp27 and tubulin inhibitors in the treatment of cancer were applied to quantitative structure–act...
متن کاملThe Effect of the Crocus Sativus L. Carotenoid, Crocin, on the Polymerization of Microtubules, in Vitro
Objective(s): Crocin, as the main carotenoid of saffron, has shown anti-tumor activity both in vitro and in vivo. Crocin might interact with cellular proteins and modulate their functions, but the exact target of this carotenoid and the other compounds of the saffron have not been discovered yet. Microtubular proteins, as one of the most important proteins inside the cells, have several functio...
متن کاملDifferentiation of human embryonic stem cells into neurons
Human embryonic stem (ES) cells are undifferentiated pluripotent cells derived from the inner cell mass of blastocyst stage embryos. These unique cell lines have the potential to form virtually any cell type in the body and can be propagated in vitro indefinitely in an undifferentiated state. These cells are capable of forming embryoid bodies (EB) that contain cells from all three embryonic lin...
متن کاملDifferentiation of human embryonic stem cells into neurons
Human embryonic stem (ES) cells are undifferentiated pluripotent cells derived from the inner cell mass of blastocyst stage embryos. These unique cell lines have the potential to form virtually any cell type in the body and can be propagated in vitro indefinitely in an undifferentiated state. These cells are capable of forming embryoid bodies (EB) that contain cells from all three embryonic lin...
متن کاملP-121: Assessment of Microtubule and Nuclear Status at Different Intervals of Bovine In Vitro Oocyte Maturation
Background: Mammalian oocyte undergoes a series of structural nuclear modulations during maturation in order to obtain full competence to support fertilization and early embryonic development. Microtubules are major cytoskeleton components and have pivotal modulators for chromosomal movement, and it has been shown that partial or immature spindle organization may compromise correct ploidy of th...
متن کامل