Abstract：
:The accurate timing and execution of organelle biogenesis is crucial for cell physiology. Centriole biogenesis is regulated by Polo-like kinase 4 (Plk4) and initiates in S-phase when a daughter centriole grows from the side of a pre-existing mother. Here, we show that a Plk4 oscillation at the base of the growing centriole initiates and times centriole biogenesis to ensure that centrioles grow at the right time and to the right size. The Plk4 oscillation is normally entrained to the cell-cycle oscillator but can run autonomously of it-potentially explaining why centrioles can duplicate independently of cell-cycle progression. Mathematical modeling indicates that the Plk4 oscillation can be generated by a time-delayed negative feedback loop in which Plk4 inactivates the interaction with its centriolar receptor through multiple rounds of phosphorylation. We hypothesize that similar organelle-specific oscillations could regulate the timing and execution of organelle biogenesis more generally.
journal_name
Celljournal_title
Cellauthors
Aydogan MG,Steinacker TL,Mofatteh M,Wilmott ZM,Zhou FY,Gartenmann L,Wainman A,Saurya S,Novak ZA,Wong SS,Goriely A,Boemo MA,Raff JWdoi
10.1016/j.cell.2020.05.018subject
Has Abstractpub_date
2020-06-25 00:00:00pages
1566-1581.e27issue
7eissn
0092-8674issn
1097-4172pii
S0092-8674(20)30613-9journal_volume
181pub_type
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