UMMS Affiliation

Department of Molecular Genetics and Microbiology; Program in Molecular Medicine

Publication Date


Document Type



Animals; Centrosome; Chromosome Segregation; Drosophila; Drosophila Proteins; Genes, Fungal; Male; Meiosis; Microscopy, Fluorescence; Microtubule-Associated Proteins; Microtubules; Mitosis; Mitotic Spindle Apparatus; Mutation; RNA, Small Interfering; Spermatocytes; Tubulin


Life Sciences | Medicine and Health Sciences


We have performed a mutational analysis together with RNA interference to determine the role of the kinesin-like protein KLP67A in Drosophila cell division. During both mitosis and male meiosis, Klp67A mutations cause an increase in MT length and disrupt discrete aspects of spindle assembly, as well as cytokinesis. Mutant cells exhibit greatly enlarged metaphase spindle as a result of excessive MT polymerization. The analysis of both living and fixed cells also shows perturbations in centrosome separation, chromosome segregation, and central spindle assembly. These data demonstrate that the MT plus end-directed motor KLP67A is essential for spindle assembly during mitosis and male meiosis and suggest that the regulation of MT plus-end polymerization is a key determinant of spindle architecture throughout cell division.

DOI of Published Version



Mol Biol Cell. 2004 Jan;15(1):121-31. Epub 2003 Sep 17. Link to article on publisher's site

Journal/Book/Conference Title

Molecular biology of the cell

Related Resources

Link to Article in PubMed

PubMed ID