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Molecular base of plant HSP90-MT interaction
 Benáková, Martina ; Krtková, Jana (advisor) ; Malcová, Ivana (referee)
Microtubules (MTs) are one of the essential cell structure that participate in a number of key events in the plant cells and their properties and functions are influenced and modified by many other proteins. These proteins belong to a group of microtubule- associated proteins (MAPs, microtubule-associated proteins). One of the MAPs, the molecular chaperone Hsp90, examines and fulfills a large number of different functions in the cell. Its colocalization with MTs has been demonstrated previously by Freudenreich and Nick (1998) and Petrášek et al. (1998). However, direct interaction with MTs was described only recently using cosedimentation assay. The specific cytosolic isoform of tobacco Hsp90 bound to MTs was called Hsp90_MT due to its ability to bind MTs. It has been also found that the binding to MTs is independent on the activity of ATP (Krtková et al., 2012). The authors also described a positive effect of Hsp90_MT on MT recovery after their exposure to cold stress. Although MT cytoskeleton dynamics is influenced by a large number of MAPs, it is surprising that the molecular mechanism of MAPs interaction with MTs and their MT-binding domains have not been described yet. Therefore, we decided to determine the tobacco Hsp90_MT MT-binding domain by production of a set of recombinant proteins...
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