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Concept

Centrosome

Publications associées (31)

Cell-free reconstitution reveals centriole cartwheel assembly mechanisms

Pierre Gönczy, Henning Paul-Julius Stahlberg, Paul Guichard, Mircea Ioan Iacovache, Virginie Hamel, Niccolo Banterle, Veronika Nemcíková Villímová

How cellular organelles assemble is a fundamental question in biology. The centriole organelle organizes around a nine-foldsymmetrical cartwheel structure typically 100 nm high comprising a stack of rings that each accommodates nine homodimers of SAS-6 pro ...

Springer Nature2017

Identification of Chlamydomonas Central Core Centriolar Proteins Reveals a Role for Human WDR90 in Ciliogenesis

Pierre Gönczy, Romain Hamelin, Coralie Busso, Paul Guichard, Florence Armand, Virginie Hamel

Centrioles are evolutionarily conserved macromolecular structures that are fundamental to form cilia, flagella, and centrosomes. Centrioles are 9-fold symmetrical microtubule-based cylindrical barrels comprising three regions that can be clearly distinguis ...

2017

Distinct mechanisms eliminate mother and daughter centrioles in meiosis of starfish oocytes

Pierre Gönczy

Centriole elimination is an essential process that occurs in female meiosis of metazoa to reset centriole number in the zygote at fertilization. How centrioles are eliminated remains poorly understood. Here we visualize the entire elimination process live ...

Rockefeller University Press2016

KAT2A/KAT2B-targeted acetylome reveals a role for PLK4 acetylation in preventing centrosome amplification

Pierre Gönczy, Mathias Fournier

Lysine acetylation is a widespread post-translational modification regulating various biological processes. To characterize cellular functions of the human lysine acetyltransferases KAT2A (GCN5) and KAT2B (PCAF), we determined their acetylome by shotgun pr ...

Nature Research2016

Computational support for a scaffolding mechanism of centriole assembly

Pierre Gönczy, Paul Guichard, Virginie Hamel

Centrioles are essential for forming cilia, flagella and centrosomes. Successful centriole assembly requires proteins of the SAS-6 family, which can form oligomeric ring structures with ninefold symmetry in vitro. While important progress has been made in ...

Nature Research2016

Dynein Transmits Polarized Actomyosin Cortical Flows to Promote Centrosome Separation

Pierre Gönczy, Alessandro De Simone

The two centrosomes present at the onset of mitosis must separate in a timely and accurate fashion to ensure proper bipolar spindle assembly. The minus-end-directed motor dynein plays a pivotal role in centrosome separation, but the underlying mechanisms r ...

Elsevier2016

Chemical Genetic Screen Identifies Natural Products that Modulate Centriole Number

Pierre Gönczy, Kai Johnsson, Michele Graciotti, Zhou Fang

Centrioles are microtubule-based organelles found in most eukaryotic cells and that are critical for the formation of cilia and flagella, as well as of centrosomes in animal cells. The number of centrioles must be strictly regulated in proliferating cells ...

Wiley-Blackwell2016

Mechanisms of centrosome separation in C. elegans

Alessandro De Simone

Centrosomes are the major microtubule organizing centers of animal cells. The two centrosomes present at the onset of mitosis must separate in a timely fashion along the nuclear envelope to ensure proper bipolar spindle assembly and thus genome stability. ...

EPFL2016

Genetic depletion of Polo-like kinase 1 leads to embryonic lethality due to mitotic aberrancies

Polo-like kinase 1 (PLK1) is a serine/threonine kinase that plays multiple and essential roles during the cell division cycle. Its inhibition in cultured cells leads to severe mitotic aberrancies and cell death. Whereas previous reports suggested that Plk1 ...

Wiley-Blackwell2016

Purification of centrosomes from mammalian cell lines

Paul Guichard

Centrosomes act as the main microtubule-organizing centre of animal cells and play critical roles in the cell, such as mitotic spindle organization, cell polarity, and motility. They are composed of two barrel-shaped structures, the centrioles, surrounded ...

Elsevier Academic Press Inc2015

The Caenorhabditis elegans protein SAS-5 forms large oligomeric assemblies critical for centriole formation

Pierre Gönczy, Georgios Hatzopoulos

Centrioles are microtubule-based organelles crucial for cell division, sensing and motility. In Caenorhabditis elegans, the onset of centriole formation requires notably the proteins SAS-5 and SAS-6, which have functional equivalents across eukaryotic evol ...

2015