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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Analysis of endomembrane markers in the cortical cytoplasm and their co-localization with Arp2/3 complex
 Jelínková, Barbora ; Schwarzerová, Kateřina (advisor) ; Fendrych, Matyáš (referee)
ARP2/3 is an evolutionarily conserved heteroheptameric protein complex. Its main activity lies in the nucleation of dendritic actin filaments that are involved in membrane remodeling. ARP2/3 takes part in plasma membrane remodeling and the formation of cytoplasmic protrusions that serve in the amoeboid motion of mammalian cells and some protists and plays role in exocytosis and endocytosis of animal and yeast cells. The main objective of this work was to find a connection between the ARP2/3 complex and the regulation of the plant endomembrane system. Using TIRF microscopy we visualized the localization of the ARP2/3 complex in the cortical layer of plant cells and compared it to the localization of several endomembrane markers from the Rab family and an exocytotic marker Exo84b. In the vicinity of the plasma membrane, the ARP2/3 complex subunits localized to dynamic dots very similar to the localization of Exo84b protein. Colocalization analysis showed that a small portion of Exo84b marker and ARP2/3 complex signals colocalize and this result was seconded by the biochemical approach of coimmunoprecipitation. Key words: ARP2/3, endomembrane system, cortical layer, RabA1g, RabC1, RaD2a, Exo84b
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