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024 7 _ |a 1044-2030
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024 7 _ |a 1939-4586
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037 _ _ |a DKFZ-2025-01002
041 _ _ |a English
082 _ _ |a 570
100 1 _ |a Gürkaşlar, Hazal Kübra
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245 _ _ |a Binding of CEP152 to PLK4 stimulates kinase activity to promote centriole assembly.
260 _ _ |a Bethesda, Md.
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|b American Society for Cell Biology
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520 _ _ |a Centriole duplication is regulated by polo-like kinase 4 (PLK4) and several conserved initiator proteins. The precise timing and regulation of PLK4 activation are critical for ensuring that centriole duplication occurs only once per cell cycle. While significant progress has been made in understanding how PLK4 is activated, many aspects remain unclear. Here, we show how CEP152 contributes to the activation of PLK4. We utilize human cell lines that have been genetically engineered to rapidly degrade CEP152. Upon degradation of CEP152, localization of PLK4 at the proximal end of the centriole is disrupted. We show that binding of CEP152 N-terminal part to PLK4 increases phosphorylation and kinase activation. CEP152 controls the localization and levels of phosphorylated PLK4 at the proximal end of the centriole. CEP152 binding to PLK4 leads to phosphorylation and activation of PLK4 which might stabilize PLK4 dimer formation, thus allowing autophosphorylation. We propose that CEP152 activates PLK4 to ensure proper centriole duplication at the onset of S-phase.
536 _ _ |a 314 - Immunologie und Krebs (POF4-314)
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700 1 _ |a Hoffmann, Ingrid
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