CGC Bibliography Paper 5216
Membrane transport in Caenorhabditis elegans: an essential role for VPS34 at the nuclear membrane.
Roggo L,
Bernard V,
Kovacs AL,
Rose AM,
Savoy F,
Zetka M,
Wymann MP,
Mueller F
- Medline:
-
- Citation:
- EMBO Journal 21: 1673-1683 2002
- Type:
- ARTICLE
- Genes:
- let-512 lrp-1
- 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