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PMID:11179417
| Citation |
Cerveny, KL, McCaffery, JM and Jensen, RE (2001) Division of mitochondria requires a novel DMN1-interacting protein, Net2p. Mol. Biol. Cell 12:309-21 |
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| Abstract |
Mitochondria are dynamic organelles that undergo frequent division and fusion, but the molecular mechanisms of these two events are not well understood. Dnm1p, a mitochondria-associated, dynamin-related GTPase was previously shown to mediate mitochondrial fission. Recently, a genome-wide yeast two-hybrid screen identified an uncharacterized protein that interacts with Dnm1p. Cells disrupted in this new gene, which we call NET2, contain a single mitochondrion that consists of a network formed by interconnected tubules, similar to the phenotype of dnm1 Delta cells. NET2 encodes a mitochondria-associated protein with a predicted coiled-coil region and six WD-40 repeats. Immunofluorescence microscopy indicates that Net2p is located in distinct, dot-like structures along the mitochondrial surface, many of which colocalize with the Dnm1 protein. Fluorescence and immunoelectron microscopy shows that Dnm1p and Net2p preferentially colocalize at constriction sites along mitochondrial tubules. Our results suggest that Net2p is a new component of the mitochondrial division machinery. |
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| Keywords |
Actins/metabolism; Actins/ultrastructure; Adaptor Proteins, Signal Transducing; Base Sequence; Carrier Proteins/genetics; Carrier Proteins/metabolism; Cytoskeleton/genetics; Cytoskeleton/ultrastructure; Fungal Proteins/genetics; Fungal Proteins/metabolism; GTP Phosphohydrolases/genetics; GTP Phosphohydrolases/metabolism; Membrane Proteins/genetics; Membrane Proteins/metabolism; Mitochondria/genetics; Mitochondria/metabolism; Mitochondria/ultrastructure; Mitochondrial Proteins; Molecular Sequence Data; Mutation; Open Reading Frames; Repetitive Sequences, Amino Acid; Saccharomyces cerevisiae Proteins; Yeasts/genetics; Yeasts/metabolism |
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Significance
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| Gene product | Qualifier | GO ID | GO term name | Evidence Code | with/from | Aspect | Notes | Status |
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