RT Journal Article
A1 Pachinger, Claudia
A1 Dobbelaere, Jeroen
A1 Rumpf-Kienzl, Cornelia
A1 Raina, Shiviya
A1 Garcia-Baucells, Júlia
A1 Sarantseva, Marina
A1 Brauneis, Andrea
A1 Dammermann, Alexander
T1 A conserved role for centriolar satellites in translation of centrosomal and ciliary proteins
JF Journal of Cell Biology
JO J Cell Biol
YR 2025
DO 10.1083/jcb.202408042
OP e202408042
VO 224
IS 8
SN 0021-9525
AB Centriolar satellites are cytoplasmic particles found in the vicinity of centrosomes and cilia whose specific functional contribution has long been unclear. Here, we identify Combover as the Drosophila ortholog of the main scaffolding component of satellites, PCM1. Like PCM1, Combover localizes to cytoplasmic foci containing centrosomal proteins and its depletion or mutation results in centrosomal and ciliary phenotypes. Strikingly, however, the concentration of satellites near centrosomes and cilia is not a conserved feature, nor do Combover foci display directed movement. Proximity interaction analysis revealed not only centrosomal and ciliary proteins, but also RNA-binding proteins and proteins involved in quality control. Further work in Drosophila and vertebrate cells found satellites to be associated with centrosomal and ciliary mRNAs, as well as evidence for protein synthesis occurring directly at satellites. Given that PCM1 depletion does not affect overall protein levels, we propose that satellites instead promote the coordinate synthesis of centrosomal and ciliary proteins, thereby facilitating the formation of protein complexes.
RD 5/24/2025
UL https://doi.org/10.1083/jcb.202408042