Document Detail

Polarities of the centriolar structure: morphogenetic consequences.
MedLine Citation:
PMID:  11419478     Owner:  NLM     Status:  MEDLINE    
Centrioles and basal bodies are two versions of the same conserved eukaryotic organelle and share two remarkable properties: nine-fold symmetry of their microtubular shaft and capacity to generate a new organelle in a fixed geometrical relationship to the mother organelle. It can thus be postulated that what is true for basal bodies is likely to be true also for centrioles. While the functions of centrioles are difficult to dissect, the functions of basal bodies are easier to approach. Over more than two decades, studies on protists have led to the notion that ciliary and flagellar basal bodies display polarities, not only a proximo-distal polarity, like in centrioles, but also a circumferential polarity accorded to the polarities of the cell and of its cytoskeleton. The major cytological and genetical data, mainly of Chlamydomonas, Paramecium and Tetrahymena, which support the notion that the microtubule triplets of basal bodies are non-equivalent, are reviewed. The morphogenetic implications of this circumferential anisotropy, perpetuated through the process of basal body duplication itself, are discussed. The question is raised of the possibility that centrioles also display a circumferential polarity, like basal bodies, and whether at least certain of their functions depend on such asymmetries.
J Beisson; M Jerka-Dziadosz
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Biology of the cell / under the auspices of the European Cell Biology Organization     Volume:  91     ISSN:  0248-4900     ISO Abbreviation:  Biol. Cell     Publication Date:    1999 May-Jun
Date Detail:
Created Date:  2001-06-21     Completed Date:  2001-06-28     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8108529     Medline TA:  Biol Cell     Country:  France    
Other Details:
Languages:  eng     Pagination:  367-78     Citation Subset:  IM    
Centre de Génétique Moléculaire du CNRS, Gif-sur-Yvette, France.
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MeSH Terms
Cell Polarity*
Centrioles / physiology,  ultrastructure*
Chlamydomonas / ultrastructure
Cilia / physiology
Flagella / physiology
Paramecium / ultrastructure
Tetrahymena / ultrastructure

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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