Ancient Leishmania coronin (CRN12) is involved in microtubule remodeling during cytokinesis

Sahasrabuddhe, Amogh A. ; Nayak, Ramesh C. ; Gupta, Chhitar M. (2009) Ancient Leishmania coronin (CRN12) is involved in microtubule remodeling during cytokinesis Journal of Cell Science, 122 . pp. 1691-1699. ISSN 0021-9533

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In general, coronins play an important role in actin-based processes, and are expressed in a variety of eukaryotic cells, including Leishmania. Here, we show that Leishmania coronin preferentially distributes to the distal tip during cytokinesis, and interacts with microtubules through a microtubule-based motor, kinesin K39. We further show that reduction in coronin levels by 40-50% in heterozygous coronin mutants results in generation of bipolar cells (25-30%), specifically in the log phase, owing to unregulated growth of the corset microtubules. Further analysis of bipolar cells revealed that the main cause of generation of bipolar cell morphology is the intrusion of the persistently growing corset microtubules into the other daughter cell corset from the opposite direction. This defect in cytokinesis, however, disappears upon episomal gene complementation. Additionally, our attempts to prepare homozygous mutants were unsuccessful, as only the aneuploid cells survive the selection process. These results indicate that coronin regulates microtubule remodeling during Leishmania cytokinesis and is essentially required for survival of these parasites in culture.

Item Type:Article
Source:Copyright of this article belongs to Company of Biologists Ltd.
Keywords:Trypanosomatids; Cytokinesis; Coronin; Microtubule Remodeling
ID Code:15958
Deposited On:16 Nov 2010 13:40
Last Modified:17 May 2016 00:47

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