Centrobin regulates centrosome function in interphase cells by limiting pericentriolar matrix recruitment

Jeffery, J.M., Grigoriev, I., Poser, I., Van Der Horst, A., Hamilton, N., Waterhouse, N., Bleier, J., Subramaniam, V.N., Maly, I.V., Akhmanova, A., & Khanna, K.K. (2013) Centrobin regulates centrosome function in interphase cells by limiting pericentriolar matrix recruitment. Cell Cycle, 12(6), pp. 899-906.

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The amount of pericentriolar matrix at the centrosome is tightly linked to both microtubule nucleation and centriole duplication, although the exact mechanism by which pericentriolar matrix levels are regulated is unclear. Here we show that Centrobin, a centrosomal protein, is involved in regulating these levels. Interphase microtubule arrays in Centrobin-depleted cells are more focused around the centrosome and are less stable than the arrays in control cells. Centrobin-depleted cells initiate microtubule nucleation more rapidly than control cells and exhibit an increase in the number of growing microtubule ends emanating from the centrosome, while the parameters of microtubule plus end dynamics around the centrosome are not significantly altered. Finally, we show that Centrobin depletion results in the increased recruitment of pericentriolar matrix proteins to the centrosome, including γ-tubulin, AKAP450, Kendrin and PCM-1. We propose that Centrobin might regulate microtubule nucleation and organization by controlling the amount of pericentriolar matrix.

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5 citations in Scopus
4 citations in Web of Science®
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ID Code: 99838
Item Type: Journal Article
Refereed: Yes
Keywords: Centrobin, centriole duplication, microtubules, nucleation, pericentriolar matrix,
DOI: 10.4161/cc.23879
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Deposited On: 14 Oct 2016 00:03
Last Modified: 28 Jun 2017 20:01

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