Cytoplasmic Chaperonin Complexes Enter Neurites Developing In-Vitro And Differ In Subunit Composition Within Single Cells

Roobol, Anne and Holmes, F.E. and Hayes, Nandini V. L. and Baines, Anthony J. and Carden, Martin J. (1995) Cytoplasmic Chaperonin Complexes Enter Neurites Developing In-Vitro And Differ In Subunit Composition Within Single Cells. Journal of Cell Science, 108 . pp. 1477-1488. ISSN 0021-9533. (The full text of this publication is not available from this repository)

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Abstract

Chaperonins containing t-complex polypeptide-1 (CCT) are cytosolic molecular chaperone particles implicated especially in the biogenesis of cytoskeletal proteins by promoting the correct folding of the major ubiquitous cytoskeletal components, tubulin and actin, We have purified cytosolic chaperonins from the ND7/23 cell line, determined their subunit composition and examined changes in the intracellular locations of their components during differentiation of ND7/23 cells to a neuronal phenotype by using immunocytochemistry and immunoblots. Chaperonins containing the CCT alpha (TCP1) subunit enter neuritic processes and are particularly noticeable at the leading edge of growth cone-like structures where they co-localise with actin, Chaperonins containing three other components (CCT beta, epsilon and gamma), however, remain predominantly restricted to perikaryal cytoplasm. These findings suggest a heterogeneous population of chaperonin particles within single differentiated ND7/23 cells and this may reflect specialisation of chaperonin function in different cytoplasmic compartments of a neurone, Further, since ribosomes do not enter neurites while CCT alpha-containing chaperonins do, the latter may play roles, subsequent to translation, which influence cytoskeletal elaboration during neuritogenesis.

Item Type: Article
Uncontrolled keywords: TCP1; MOLECULAR CHAPERONE; NEURITOGENESIS; CYTOSKELETON; ACTIN; TUBULIN; PROTEIN FOLDING AND ASSEMBLY
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Biosciences
Depositing User: I.T. Ekpo
Date Deposited: 05 Jun 2009 20:11
Last Modified: 17 Apr 2014 13:05
Resource URI: http://kar.kent.ac.uk/id/eprint/18998 (The current URI for this page, for reference purposes)
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