Crossref journal-article
Wiley
Journal of Neuroscience Research (311)
Abstract

AbstractWe have used the monoclonal antibody YL 1/2 (Tyr) specific for tyrosinated tubulin, and a polyclonal antibody (Glu) specific for detyrosinated tubulin to visualize the distribution of microtubules and microtubule assembly sites during axonal outgrowth. Cerebellar macroneurons growing in culture initially extend several short and thin neurites which have the potential to differentiate either as axons or dendrites (Ferreira and Caceres: Developmental Brain Research 49:205‐213, 1989). At the onset of axonal outgrowth the Tyr antibody labels the minor neurites, the axon, and its growth cone, while the Glu antibody only shows immunoreactivity in the axonal shaft. After nocodazole treatment, the Tyr staining disappears, whereas that produced by the Glu antibody remains practically unchanged. When nocodazole was removed, tyrosinated microtubules reappeared first at the tip of the axon, in a more distal region than that occupied by detyrosinated microtubules; another focal site of tyrosinated tubulin incorporation was detected in the cell body. Incorporation of tyrosinated tubulin into growing axons was also studied after taxol treatment. After long incubation periods in the presence of taxol, the Tyr staining disappeared from the axon but remained in the cell body; however, immunoreactivity in this site was negative when the cells were preincubated in the presence of protein synthesis inhibitors. Release from taxol results in the reappearance of Tyr immunoreactivity at the distal end of the axon. Taken collectively, the present results indicate (1) that in cerebellar macroneurons axonal differentiation is accompanied by a temporal and spatial differentiation of microtubules fcnd (2) that there is an active site of tyrosinated tubulin assembly at the tip of axonal processes, and they suggest that the highly tyrosinated domain in this region is a consequence of rapid microtubule turnover and tubulin tyrosine ligase activity.

Bibliography

Arregui, C., Busciglio, J., Caceres, A., & Barra, H. S. (1991). Tyrosinated and detyrosinated microtubules in axonal processes of cerebellar macroneurons grown in culture. Journal of Neuroscience Research, 28(2), 171–181. Portico.

Authors 4
  1. C. Arregui (first)
  2. J. Busciglio (additional)
  3. A. Caceres (additional)
  4. H. S. Barra (additional)
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Dates
Type When
Created 20 years, 8 months ago (Jan. 1, 2005, 12:24 a.m.)
Deposited 1 year, 10 months ago (Oct. 22, 2023, 5:38 p.m.)
Indexed 1 day, 3 hours ago (Sept. 3, 2025, 7:14 a.m.)
Issued 34 years, 7 months ago (Feb. 1, 1991)
Published 34 years, 7 months ago (Feb. 1, 1991)
Published Online 20 years, 10 months ago (Oct. 11, 2004)
Published Print 34 years, 7 months ago (Feb. 1, 1991)
Funders 0

None

@article{Arregui_1991, title={Tyrosinated and detyrosinated microtubules in axonal processes of cerebellar macroneurons grown in culture}, volume={28}, ISSN={1097-4547}, url={http://dx.doi.org/10.1002/jnr.490280204}, DOI={10.1002/jnr.490280204}, number={2}, journal={Journal of Neuroscience Research}, publisher={Wiley}, author={Arregui, C. and Busciglio, J. and Caceres, A. and Barra, H. S.}, year={1991}, month=feb, pages={171–181} }