Trimerisation is important for the function of clathrin at the mitotic spindle.
Trimerisation is important for the function of clathrin at the mitotic spindle.
复制标题
修剪对于丝分裂纺锤体上网状蛋白的功能很重要。
DOI:
10.1242/jcs.03192
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发表时间:
2006-10-01
影响因子:
4
通讯作者:
Lagnado L
中科院分区:
文献类型:
--
作者:
Royle SJ;Lagnado L
Clathrin is a triskelion consisting of three heavy chains each with an associated light chain. During mitosis, clathrin contributes to kinetochore fibre stability. As the N-terminal domain at the foot of each leg can bind to the mitotic spindle, we proposed previously a “bridge hypothesis” wherein clathrin acts as a brace between two or three microtubules within a kinetochore fibre to increase fibre stability. Here, we have tested this hypothesis by replacing endogenous clathrin heavy chain in human cells with a panel of clathrin constructs. Mutants designed to abolish trimerization were unable to rescue the mitotic defects caused by depletion of endogenous clathrin. In contrast, stunted triskelia with contracted legs could partially rescue normal mitosis. These results indicate that the key structural features of clathrin that are necessary for its function in mitosis are a trimeric molecule with a spindle interaction domain at each end, supporting the “bridge hypothesis” for clathrin function in mitosis.
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影响因子:
64.8
作者:
UNGEWICKELL, E;BRANTON, D
通讯作者:
BRANTON, D
影响因子:
4.8
作者:
Shih, W;Gallusser, A;Kirchhausen, T
通讯作者:
Kirchhausen, T
影响因子:
64.5
作者:
LIU, SH;WONG, ML;BRODSKY, FM
通讯作者:
BRODSKY, FM
影响因子:
4.8
作者:
Royle, SJ;Bobanovic, LK;Murrell-Lagnado, RD
通讯作者:
Murrell-Lagnado, RD
影响因子:
64.8
作者:
Royle, SJ;Bright, NA;Lagnado, L
通讯作者:
Lagnado, L