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Cryo-Electron Tomography and Proteomics studies of centrosomes from differentiated quiescent thymocytes.


ABSTRACT: We have used cryo Electron Tomography, proteomics and immunolabeling to study centrosomes isolated from the young lamb thymus, an efficient source of quiescent differentiated cells. We compared the proteome of thymocyte centrosomes to data published for KE37 cells, focusing on proteins associated with centriole disengagement and centrosome separation. The data obtained enhances our understanding of the protein system joining the centrioles, a system comprised of a branched network of fibers linked to an apparently amorphous density that was partially characterized here. A number of proteins were localized to the amorphous density by immunolabeling (C-NAP1, cohesin SMC1, condensin SMC4 and NCAPD2), yet not DNA. In conjuction, these data not only extend our understanding of centrosomes but they will help refine the model that focus on the protein system associated with the centriolar junction.

SUBMITTER: Busselez J 

PROVIDER: S-EPMC6510768 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature

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Cryo-Electron Tomography and Proteomics studies of centrosomes from differentiated quiescent thymocytes.

Busselez Johan J   Chichón Francisco Javier FJ   Rodríguez Maria Josefa MJ   Alpízar Adan A   Gharbi Séverine Isabelle SI   Franch Mònica M   Melero Roberto R   Paradela Alberto A   Carrascosa José L JL   Carazo José-Maria JM  

Scientific reports 20190510 1


We have used cryo Electron Tomography, proteomics and immunolabeling to study centrosomes isolated from the young lamb thymus, an efficient source of quiescent differentiated cells. We compared the proteome of thymocyte centrosomes to data published for KE37 cells, focusing on proteins associated with centriole disengagement and centrosome separation. The data obtained enhances our understanding of the protein system joining the centrioles, a system comprised of a branched network of fibers link  ...[more]

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