This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. (i) find what regulates organelle transport along microtubules in the melanophore system: we will identify differentially regulated protein kinase(s) bound to organelles and determine how they regulate organelle transport; (ii) find the mechanism of coordination between plus and minus-end movement of pigment organelles along microtubules: we will determine if coordination is governed by cooperative differential binding of plus and minus-end directed motors to receptor proteins on the surface of organelles or it is determined by a stochastic mechanism; (iii) find how myosin-V is regulated in melanophores and other cell types: we will explore mechanisms of regulation of myosin-V in interphase cells using Xenopus melanophores and mouse macrophages and determine the role of p21-activated kinase (PAK1) in its regulation.
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