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- Title
Membrane transport in Caenorhabditis elegans: an essential role for VPS34 at the nuclear membrane.
- Authors
Roggo, Lorenz; Bernard, Vincent; Kovacs, Attila L; Rose, Ann M; Savoy, Fabienne; Zetka, Monique; Wymann, Matthias P; Müller, Fritz
- Abstract
Here we present a detailed genetic analysis of let-512/vps34 that encodes the Caenorhabditis elegans homologue of the yeast phosphatidylinositol 3-kinase Vps34p. LET-512/VPS34 has essential functions and is ubiquitously expressed in all tissues and developmental stages. It accumulates at a perinuclear region, and mutations in let-512/vps34 result in an expansion of the outer nuclear membrane as well as in a mislocalization and subsequent complete lack of expression of LRP-1, a C.elegans LDL receptor normally associated with the apical surface of hypodermal cells. Using a GFP::2xFYVE fusion protein we found that the phosphatidylinositol 3-phosphate (PtdIns 3-P) product of LET-512/VPS34 is associated with a multitude of intracellular membranes and vesicles located at the periphery, including endocytic vesicles. We propose that LET-512/VPS34 is required for membrane transport from the outer nuclear membrane towards the cell periphery. Thus, LET-512/VPS34 may regulate the secretory pathway in a much broader range of compartments than was previously suggested for the yeast orthologue.
- Publication
The EMBO journal, 2002, Vol 21, Issue 7, p1673
- ISSN
0261-4189
- Publication type
Journal Article
- DOI
10.1093/emboj/21.7.1673