Identification of phosphorylation-induced changes in vimentin intermediate filaments by site-directed spin labeling and electron paramagnetic resonance.
Identification of phosphorylation-induced changes in vimentin intermediate filaments by site-directed spin labeling and electron paramagnetic resonance.
复制标题
通过定点自旋标记和电子顺磁共振鉴定波形蛋白中间丝中磷酸化诱导的变化。
DOI:
10.1021/bi801137m
复制
发表时间:
2008
期刊:
影响因子:
2.9
通讯作者:
Fitzgerald,PaulG
中科院分区:
文献类型:
--
作者:
Pittenger,JoshT;Hess,JohnF;Budamagunta,MadhuS;Voss,JohnC;Fitzgerald,PaulG
Phosphorylation drives the disassembly of the vimentin intermediate filament (IF) cytoskeleton at mitosis. Chromatographic analysis has suggested that phosphorylation produces a soluble vimentin tetramer, but little has been determined about the structural changes that are caused by phosphorylation or the structure of the resulting tetramer. In this study, site-directed spin labeling and electron paramagnetic resonance (SDSL-EPR) were used to examine the structural changes resulting from protein kinase A phosphorylation of vimentin IFs in vitro. EPR spectra suggest that the tetrameric species resulting from phosphorylation is the A11 configuration. EPR spectra also establish that the greatest degree of structural change was found in the linker 2 and the C-terminal half of the rod domain, despite the fact that most phosphorylation occurs in the N-terminal head domain. The phosphorylation-induced changes notably affected the proposed “trigger sequences” located in the linker 2 region, which have been hypothesized to mediate the induction of coiled-coil formation. These data are the first to document specific changes in IF structure resulting from a physiologic regulatory mechanism and provide further evidence, also generated by SDSL-EPR, that the linker regions play a key role in IF structure and regulation of assembly/disassembly.
登录
查看更多内容
影响因子:
2.9
作者:
ANDO, S;TANABE, K;INAGAKI, M
通讯作者:
INAGAKI, M
DOI:
--
发表时间:
1993
期刊:
影响因子:
--
作者:
G. Likhtenshtein
通讯作者:
G. Likhtenshtein
DOI:
--
发表时间:
1989
期刊:
European Journal of Biochemistry
影响因子:
--
作者:
N. Geisler;M. Hatzfeld;K. Weber
通讯作者:
K. Weber
DOI:
10.1073/pnas.82.23.7929
发表时间:
1985-01-01
影响因子:
11.1
作者:
SOELLNER, P;QUINLAN, RA;FRANKE, WW
通讯作者:
FRANKE, WW
影响因子:
11.4
作者:
N. Geisler;K. Weber
通讯作者:
K. Weber