Centriole reduplication during prolonged interphase requires procentriole maturation governed by Plk1.
Centriole reduplication during prolonged interphase requires procentriole maturation governed by Plk1.
复制标题
DOI:
10.1016/j.cub.2010.05.050
复制
发表时间:
2010-07-27
期刊:
影响因子:
9.2
通讯作者:
Khodjakov, Alexey
中科院分区:
文献类型:
--
作者:
Loncarek, Jadranka;Hergert, Polla;Khodjakov, Alexey
Supernumerary centrioles lead to abnormal mitosis which in turn promotes tumorigenesis. Thus, centriole duplication must be coordinated with the cell cycle to ensure that the number of centrioles in the cell doubles precisely during each cell cycle. However, in some transformed cells centrioles undergo multiple rounds of duplication (reduplication) during prolonged interphase. Mechanisms responsible for centriole reduplication are poorly understood. Here, we report that centrioles reduplicate consistently in cancerous and non-transformed human cells during G2 arrests and this reduplication requires the activity of Polo-like kinase 1 (Plk1). We also find that cell’s ability to reduplicate centrioles during S-arrests depends on the presence of activated (T210-phosphorylated) Plk1 at the centrosome. In the absence of activated Plk1, nascent procentrioles remain associated with mother centrioles, which prevent centriole reduplication. In contrast, if Plk1(pT210) appears at the centrosome, procentrioles mature, disengage from mother centrioles, and ultimately duplicate. Plk1 activity is not required for the assembly of procentrioles, however. Thus, the role of Plk1 is to coordinate centriole duplication cycle with the cell cycle. Activation of Plk1 during late-S-G2 induces procentriole maturation and after this point the centriole cycle can be completed autonomously, even in the absence of cell cycle progression.
登录
查看更多内容
影响因子:
3.7
作者:
Silkworth WT;Nardi IK;Scholl LM;Cimini D
通讯作者:
Cimini D
影响因子:
21.3
作者:
Loncarek, Jadranka;Hergert, Polla;Khodjakov, Alexey
通讯作者:
Khodjakov, Alexey
影响因子:
3.3
作者:
Guarguaglini, G;Duncan, PI;Nigg, EA
通讯作者:
Nigg, EA
影响因子:
9.2
作者:
Lenart, Peter;Petronczki, Mark;Peters, Jan-Michael
通讯作者:
Peters, Jan-Michael
影响因子:
64.8
作者:
Macurek, Libor;Lindqvist, Arne;Medema, Rene H.
通讯作者:
Medema, Rene H.