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Cell Motil Cytoskeleton. 2000 Mar;45(3):200-10.

Identification of a 195 kDa protein in the striated rootlet: its expression in ciliated and ciliogenic cells.

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Department of Anatomy and Cell Biology, Gunma University School of Medicine, Maebashi, Japan.


Little is known about the molecular composition of the ciliary rootlet. We raised monoclonal antibodies to a crude preparation of striated rootlets isolated from the human oviduct, and obtained a clone (R4109) that specifically labeled the ciliary rootlets. Rootlets associated with the solitary cilium in secretory cells and fibroblasts were also labeled. R4109 identified a 195-kDa protein by immunoblotting. Ciliogenic cells in the oviduct epithelium of young mice were labeled in the globular and/or granular pattern by R4109 by immunofluorescence microscopy. Immunoelectron microscopy showed that they corresponded to fibrogranular complex and dense granule, respectively. The result demonstrated that the 195-kDa protein is a component common to the striated rootlet and dense granule, and thus suggested that dense granules are involved in the rootlet formation.

[Indexed for MEDLINE]

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