Molecular characterization of Ciona sperm outer arm dynein reveals multiple components related to outer arm docking complex protein 2
Article first published online: 17 JUL 2006
Copyright © 2006 Wiley-Liss, Inc.
Cell Motility and the Cytoskeleton
Volume 63, Issue 10, pages 591–603, October 2006
How to Cite
Hozumi, A., Satouh, Y., Makino, Y., Toda, T., Ide, H., Ogawa, K., King, S. M. and Inaba, K. (2006), Molecular characterization of Ciona sperm outer arm dynein reveals multiple components related to outer arm docking complex protein 2. Cell Motil. Cytoskeleton, 63: 591–603. doi: 10.1002/cm.20146
- Issue published online: 6 SEP 2006
- Article first published online: 17 JUL 2006
- Manuscript Accepted: 5 JUN 2006
- Manuscript Received: 13 FEB 2006
- Ministry of Education, Culture, Sports, Science and Technology, Japan
- The National Institutes of Health. Grant Number: GM51293
- sperm flagella;
- Ciona intestinalis
Using proteomic and immunochemical techniques, we have identified the light and intermediate chains (IC) of outer arm dynein from sperm axonemes of the ascidian Cionaintestinalis. Ciona outer arm dynein contains six light chains (LC) including a leucine-rich repeat protein, Tctex1- and Tctex2-related proteins, a protein similar to Drosophila roadblock and two components related to Chlamydomonas LC8. No LC with thioredoxin domains is included in Ciona outer arm dynein. Among the five ICs in Ciona, three are orthologs of those in sea urchin dynein: two are WD-repeat proteins and the third one, unique to metazoan sperm flagella, contains both thioredoxin and nucleoside diphosphate kinase modules. The remaining two Ciona ICs have extensive coiled coil structure and show sequence similarity to outer arm dynein docking complex protein 2 (DC2) that was first identified in Chlamydomonas flagella. We recently identified a third DC2-like protein with coiled coil structure, Ci-Axp66.0 that is also associated in substoichiometric amounts with Ciona outer arm dynein. In addition, Oda5p, a component of an additional complex required for assembly of outer arm dynein in Chlamydomonas flagella, also groups with this family of DC2-like proteins. Thus, the assembly of outer arm dynein onto doublet microtubules involves multiple coiled-coil proteins related to DC2. Cell Motil. Cytoskeleton 2006. © 2006 Wiley-Liss, Inc.