Gamma-tubulin in differentiated cell types: localization in the vicinity of basal bodies in retinal photoreceptors and ciliated epithelia. J Cell Sci 1993 Apr;104 ( Pt 4):1229-37
Date
04/01/1993Pubmed ID
7686172DOI
10.1242/jcs.104.4.1229Scopus ID
2-s2.0-0027285879 (requires institutional sign-in at Scopus site) 98 CitationsAbstract
gamma-Tubulin, a newly discovered member of the tubulin superfamily required for microtubule nucleation, is associated with the centrosome(s) throughout the vertebrate cell cycle. We have used a polyclonal antibody, generated against a highly conserved segment of gamma-tubulin, to localize this protein in postmitotic, ciliated cells, in which the major microtubule organizing centers are the basal bodies. Single-cilium photoreceptor cells from bovine retina contained a strongly immunoreactive species, with molecular characteristics of gamma-tubulin, in association with a detergent-resistant, cytoskeletal fraction devoid of cytoplasmic microtubules. gamma-Tubulin was discretely localized throughout the basal body region, extending opposite to the axonemal shaft, in mechanically detached rod outer segments and whole-mounted, connecting cilium-derived axonemes. In multiciliated epithelia from bovine trachea and oviduct, gamma-tubulin immunoreactivity was detected at the base of the cilia, where basal bodies are located. These results suggest that this key centrosomal protein of mitotically active cells is also an integral component of microtubule organizing centers, required for the generation of the microtubule network in terminally differentiated cells.
Author List
Muresan V, Joshi HC, Besharse JCMESH terms used to index this publication - Major topics in bold
AnimalsAntibodies, Monoclonal
Cattle
Cell Differentiation
Cilia
Epithelium
Female
Photoreceptor Cells
Retina
Staining and Labeling
Tubulin
