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Genetic analysis of lysosomal trafficking in Caenorhabditis elegans.


ABSTRACT: The intestinal cells of Caenorhabditis elegans embryos contain prominent, birefringent gut granules that we show are lysosome-related organelles. Gut granules are labeled by lysosomal markers, and their formation is disrupted in embryos depleted of AP-3 subunits, VPS-16, and VPS-41. We define a class of gut granule loss (glo) mutants that are defective in gut granule biogenesis. We show that the glo-1 gene encodes a predicted Rab GTPase that localizes to lysosome-related gut granules in the intestine and that glo-4 encodes a possible GLO-1 guanine nucleotide exchange factor. These and other glo genes are homologous to genes implicated in the biogenesis of specialized, lysosome-related organelles such as melanosomes in mammals and pigment granules in Drosophila. The glo mutants thus provide a simple model system for the analysis of lysosome-related organelle biogenesis in animal cells.

SUBMITTER: Hermann GJ 

PROVIDER: S-EPMC1165410 | biostudies-literature | 2005 Jul

REPOSITORIES: biostudies-literature

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Genetic analysis of lysosomal trafficking in Caenorhabditis elegans.

Hermann Greg J GJ   Schroeder Lena K LK   Hieb Caroline A CA   Kershner Aaron M AM   Rabbitts Beverley M BM   Fonarev Paul P   Grant Barth D BD   Priess James R JR  

Molecular biology of the cell 20050420 7


The intestinal cells of Caenorhabditis elegans embryos contain prominent, birefringent gut granules that we show are lysosome-related organelles. Gut granules are labeled by lysosomal markers, and their formation is disrupted in embryos depleted of AP-3 subunits, VPS-16, and VPS-41. We define a class of gut granule loss (glo) mutants that are defective in gut granule biogenesis. We show that the glo-1 gene encodes a predicted Rab GTPase that localizes to lysosome-related gut granules in the inte  ...[more]

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