RESUMO

Microtubule Organizing Centers (MTOC) are subcellular structures in eukaryotic cells where nucleation of microtubules (MTs) takes place and represents the filament's minus end. Their localization depends on the species, cell type, and cell cycle stage. Along the fungal kingdom, the Spindle Pole Body (SPB) in the nucleus (an equivalent to Centrosomes in animal cells) is the principal MTOC. Other MTOCs have been identified in filamentous fungi, such as the Spitzenkörper in the hyphal tips of Schizosaccharomyces pombe or the septal pore of Aspergillus nidulans. However, in the fungal-model organism Neurospora crassa, these alternative MTOCs have not been recognized. Here, we present a Mass spectrometry-based dataset of proteins interacting with four MTOC components of N. crassa tagged with fluorescent proteins: γ-Tubulin-sGFP (main nucleator at the SPB), MZT-1-sGFP (structural SPB microprotein), APS-2-dRFP (septal protein and recognized SPB component), and SPA-10-sGFP (septal MTOC protein). A WT and a cytosolic GFP expressing strain were included as controls. The protein interactors were pulled down by Co-IP1, using GFP-Magnetic agarose that captures recombinant GFP proteins (including GFP-derivatives) in their native state. Bounded proteins were separated by SDS-PAGE and identified by nano LC-MS/MS2. The protein annotation was done using the N. crassa protein database.