Centrosome maturation relies on the assembly of an underlying molecular scaffold. In this issue of JCB, Rios et al. (https://doi.org/10.1083/jcb.202306142) use cross-linking mass spectrometry to reveal how PLK-1 phosphorylation promotes intermolecular SPD-5 self-association that is essential for scaffold formation.
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http://dx.doi.org/10.1083/jcb.202403003 | DOI Listing |
Dev Cell
December 2024
Structural and Computational Biology Unit, European Molecular Biology Laboratory (EMBL), 69117 Heidelberg, Germany; Cell Biology and Biophysics Unit, EMBL, 69117 Heidelberg, Germany. Electronic address:
Centrosomes organize microtubules that are essential for mitotic divisions in animal cells. They consist of centrioles surrounded by pericentriolar material (PCM). Questions related to mechanisms of centriole assembly, PCM organization, and spindle microtubule formation remain unanswered, partly due to limited availability of molecular-resolution structural data inside cells.
View Article and Find Full Text PDFCells
August 2024
Institute of Molecular Biology and Pathology, National Research Council of Italy, c/o Sapienza University of Rome, Via degli Apuli 4, 00185 Rome, Italy.
The AurkA serine/threonine kinase is a key regulator of cell division controlling mitotic entry, centrosome maturation, and chromosome segregation. The microtubule-associated protein TPX2 controls spindle assembly and is the main AurkA regulator, contributing to AurkA activation, localisation, and stabilisation. Since their identification, AurkA and TPX2 have been described as being overexpressed in cancer, with a significant correlation with highly proliferative and aneuploid tumours.
View Article and Find Full Text PDFNat Commun
August 2024
Cell Signalling, UCL Cancer Institute, University College London, 72 Huntley Street, London, WC1E 6BT, UK.
Primary cilia are antenna-like organelles which sense extracellular cues and act as signalling hubs. Cilia dysfunction causes a heterogeneous group of disorders known as ciliopathy syndromes affecting most organs. Cilia disassembly, the process by which cells lose their cilium, is poorly understood but frequently observed in disease and upon cell transformation.
View Article and Find Full Text PDFCurr Biol
August 2024
Internal Medicine IV, Medical Center - University of Freiburg, CIBSS Centre for Integrative Biological Signalling Studies, and SGBM Spemann Graduate School for Biology and Medicine, University of Freiburg, Freiburg, Germany. Electronic address:
Multiciliated cells produce over a hundred motile cilia anchored to the membrane by modified centrioles. Recent work has characterized an alternative cell cycle used by this post-mitotic cell type to generate additional centrioles without undergoing cell division.
View Article and Find Full Text PDFiScience
August 2024
Department of Genetics, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA.
Meiotic spindles are critical to ensure chromosome segregation during gamete formation. Oocytes lack centrosomes and use alternative microtubule-nucleation mechanisms for spindle building. How these mechanisms are regulated is still unknown.
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