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The Caenorhabditis elegans centrosomal protein SPD-2 is required for both pericentriolar material recruitment and centriole duplication.

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Pelletier,  Laurence
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Ozlu,  Nurhan
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Hannak,  Eva
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Cowan,  Carrie
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Habermann,  Bianca
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Ruer,  Martine
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Muller-Reichert,  Thomas
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Hyman,  Anthony A
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Citation

Pelletier, L., Ozlu, N., Hannak, E., Cowan, C., Habermann, B., Ruer, M., et al. (2004). The Caenorhabditis elegans centrosomal protein SPD-2 is required for both pericentriolar material recruitment and centriole duplication. Current Biology, 14(10), 863-873.


Cite as: http://hdl.handle.net/21.11116/0000-0001-1271-B
Abstract
BACKGROUND: The centrosome is composed of a centriole pair and pericentriolar material (PCM). By marking the site of PCM assembly, the centrioles define the number of centrosomes present in the cell. The PCM, in turn, is responsible for the microtubule (MT) nucleation activity of centrosomes. Therefore, in order to assemble a functional bipolar mitotic spindle, a cell needs to control both centriole duplication and PCM recruitment. To date, however, the molecular mechanisms that govern these two processes still remain poorly understood. RESULTS: Here we show that SPD-2 is a novel component of the C. elegans centrosome. SPD-2 localizes to the centriole throughout the cell cycle and accumulates on the PCM during mitosis. We show that SPD-2 requires SPD-5 for its accumulation on the PCM and that in the absence of SPD-2, centrosome assembly fails. We further show that centriole duplication is also defective in spd-2(RNAi) embryos, but not in spd-5(RNAi) embryos, where PCM recruitment is efficiently blocked. CONCLUSIONS: Taken together, our results suggest that SPD-2 may link PCM recruitment and centriole duplication in C. elegans. SPD-2 shares homology with a human centrosome protein, suggesting that this key component of the C. elegans centrosome is evolutionarily conserved.