bims-fascar Biomed News
on Phase separation and cellular architecture
Issue of 2020‒12‒06
one paper selected by
Victoria Yan
Max Planck Institute of Molecular Cell Biology and Genetics

  1. Curr Opin Struct Biol. 2020 Nov 25. pii: S0959-440X(20)30164-0. [Epub ahead of print]66 139-147
      Centrosomes are micron-scale structures that nucleate microtubule arrays for chromosome segregation and mitotic spindle positioning. For these jobs, centrosomes must be dynamic enough to grow, yet stable enough to resist microtubule-mediated forces. How do centrosomes achieve such seemingly contradictory features? While much is understood about the molecular parts of centrosomes, very little is known about their functional material properties. Two prevalent hypotheses pose that the centrosome is either a liquid droplet or a solid lattice. However, many material states exist between a pure Newtonian liquid and a crystalline solid, and it is not clear where centrosomes lie along this spectrum. Furthermore, broad terms like "liquid" or "solid" do not reveal functional properties like strength, ductility, elasticity, and toughness, which are more relevant to understand how centrosomes resist forces. This review covers recent findings and new rheology techniques that reveal the material characteristics of centrosomes and how they are regulated.