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Plant and Cell Physiology Advance Access first published online on January 3, 2007
This version published online on January 4, 2007
Plant and Cell Physiology, doi:10.1093/pcp/pcl064
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© The Author 2007. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org

Characterization of a splicing variant of plant Aurora kinase

Daisuke Kurihara1,4, Akira Kawabe1,2,4, Sachihiro Matsunaga1, Katsuyuki Nakagawa1, Satoru Fujimoto1,3, Susumu Uchiyama1 and Kiichi Fukui1,*

1Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Osaka, Japan
2Present address: Institute of Evolutionary Biology, University of Edinburgh, Ashworth Lab. King's Buildings, W. Mains Rd., Edinburgh EH9 3JT, UK
3Present address: Department of Molecular Biology 3944, College of Agriculture, University of Wyoming, 1000 East University Avenue, Laramie, WY 82071
4These authors equally contributed to this work.

*Corresponding author: Kiichi Fukui, Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Osaka, Japan E-mail: kfukui{at}bio.eng.osaka-u.ac.jp; Tel: +81-6-6879-7440 / Fax: +81-6-6879-7441


  Abstract

Aurora kinases play a key role in chromosome segregation and cytokinesis. In plants, three Aurora kinases (AtAUR1-3) have been identified in Arabidopsis thaliana. Here, we report an AtAUR2 splicing variant (AtAUR2S), which lacking the fourth exon which encodes a part of the kinase domain of AtAUR2. AtAUR2S was shown to have lost its kinase activity to phosphorylate histone H3 at Ser10; however, it maintained its ability to bind to histone H3. The localization pattern of AtAUR2S was the same as that of AtAUR2. The findings suggest that AtAUR2S affects cell division by competing with AtAUR2.

Keywords: alternative splicing - Arabidopsis thaliana - Aurora kinase - histone H3

The nucleotide sequence reported in this paper has been submitted to the DDBJ/EMBL/GenBank databases under the accession number AB279605 [GenBank] .


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D. Kurihara, S. Matsunaga, S. Uchiyama, and K. Fukui
Live Cell Imaging Reveals Plant Aurora Kinase Has Dual Roles During Mitosis
Plant Cell Physiol., August 1, 2008; 49(8): 1256 - 1261.
[Abstract] [Full Text] [PDF]


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