The rapid onset of elasticity during the assembly of the bacterial cell-division protein FtsZ.
The rapid onset of elasticity during the assembly of the bacterial cell-division protein FtsZ.
复制标题
细菌细胞分裂蛋白 FtsZ 组装过程中快速产生弹性。
DOI:
10.1016/j.bbrc.2005.05.152
复制
发表时间:
2005
期刊:
影响因子:
--
通讯作者:
Wirtz,Denis
中科院分区:
文献类型:
--
作者:
Esue,Osigwe;Tseng,Yiider;Wirtz,Denis
FtsZ, a prokaryotic homolog of eukaryotic tubulin, is a major constituent of the bacterial Z-ring, which contracts the cell wall during cell division. Because the mechanical properties of FtsZ are unknown, its function in the maintenance and constriction of the Z-ring is not well understood. Here, quantitative rheometry shows that, at physiological concentrations, FtsZ filaments form, extremely rapidly, highly elastic networks within physiological time scales (∼ minutes), much faster than other major dynamic cytoskeletal filaments, including microtubule, actin, and vimentin in eukaryotes. FtsZ networks display a relatively low viscosity and a high resilience against shear stresses, as well as an elasticity that depends weakly on concentration, G∼C0.57, a power-law dependence consistent with crosslinked flexible filaments. Calcium, whose intracellular concentration increases during bacterial division, further enhances the elasticity of FtsZ networks through filament bundling, an effect that occurs in the presence of GTP, not GDP. These studies suggest that FtsZ filaments have the toughness to provide strong mechanical support for the maintenance and circumferential constriction of the bacterial Z-ring.
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DOI:
10.1073/pnas.94.2.559
发表时间:
1997-01-21
影响因子:
11.1
作者:
Pogliano, J;Pogliano, K;Beckwith, J
通讯作者:
Beckwith, J
影响因子:
3.5
作者:
D. Scheffers;J. D. de Wit;T. den Blaauwen;A. Driessen
通讯作者:
A. Driessen
影响因子:
5.6
作者:
Tseng, Y;Fedorov, E;Wirtz, D
通讯作者:
Wirtz, D
影响因子:
3.6
作者:
Scheffers, DJ;den Blaauwen, T;Driessen, AJM
通讯作者:
Driessen, AJM
影响因子:
4.8
作者:
Beuria, TK;Krishnakumar, SS;Panda, D
通讯作者:
Panda, D