| Abstract Detail
Cell Biology/Physiology Ramírez-Del Villar, Arianne [1], Callejas-Negrete, Olga A. [1], Riquelme, Meritxell [1], Mouriño-Pérez, Rosa R. [1]. The class V myosin in Neurospora crassa. Filamentous fungi grow in polarized fashion, though the secretion of vesicles to the cell apex. Vesicle movement is produced by motor protein via the cytoskeleton. For actin the group of motor proteins are called myosins. Class V myosin is responsible for intracellular vesicle transport in diffrent organisms. We studied the dynamics and localization of the only class V myosin in Neurospora crassa tagged with GFP and characterize a Myo-5 deletion mutant. MYO-5-GFP is localized in the tip, partially co-locating with Spitzenköper forming to dome. The photobleaching studies showed that MYO-5-GFP is transported from the subapical region toward to the tip. The absence of class V myosin produces alterations in growth and morphology of the hyphae. Colonies of  Myo-5 mutant are smaller and more compact than the WT strain. Myo-5 mutant produced 22.8 % of the WT biomass. Observations by confocal microscopy show differences in cell wall distribution in conidia, germlings and mature hyphae between the Myo-5 mutant and the WT. Moreover, in mutant hyphae the Spitzenkörper is clearly disorganized, observed as a diffuse cloud. Conidia in the Myo-5 mutant are bigger (2 X) and very rare. In conclusion Myo-V in N. crassa is not essential, but plays an important role in morphogenesis and growth in N. crassa. Log in to add this item to your schedule
1 - Centro de Investigación Cientifica y de Estudios Superiores de Ensenad, Microbiology, Carretera Ensenada-Tijuana No. 3918, Zona Playitas, Ensenada, BC, 22860, México
Keywords: class V myosin Vesicle movement.
Presentation Type: Offered Paper - Paper Session: 6 Location: Room 104 AB/Kellogg Hotel and Conference Center Date: Monday, June 9th, 2014 Time: 1:45 PM Number: 6004 Abstract ID:187 Candidate for Awards:Graduate Student Poster Presentation Award |