DGRASP localization and function in the early exocytic pathway in Drosophila S2 cells.

ABSTRACT: The de novo model for Golgi stack biogenesis predicts that membrane exiting the ER at transitional ER (tER) sites contains and recruits all the necessary molecules to form a Golgi stack, including the Golgi matrix proteins, p115, GM130, and GRASP65/55. These proteins leave the tER sites faster than Golgi transmembrane resident enzymes, suggesting that they act as a template nucleating the formation of the Golgi apparatus. However, the localization of the Golgi matrix proteins at tER sites is only shown under conditions where exit from the ER is blocked. Here, we show in Drosophila S2 cells, that dGRASP, the single Drosophila homologue of GRASP65/55, localizes both to the Golgi membranes and the tER sites at steady state and that the myristoylation of glycine 2 is essential for the localiza

SUBMITTER: Kondylis V 

PROVIDER: S-EPMC1196319 | biostudies-literature | 2005 Sep

REPOSITORIES: biostudies-literature