N‐terminal β‐strand of single‐headed kinesin‐1 can modulate the off‐axis force‐generation and resultant rotation pitch
N‐terminal β‐strand of single‐headed kinesin‐1 can modulate the off‐axis force‐generation and resultant rotation pitch
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单头驱动蛋白-1的N端β链可以调节离轴力的产生和由此产生的旋转螺距
DOI:
10.1002/cm.21630
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发表时间:
2020
期刊:
影响因子:
2.9
通讯作者:
Yajima Junichiro
中科院分区:
文献类型:
--
作者:
Yamagishi Masahiko;Fujimura Shoko;Sugawa Mitsuhiro;Nishizaka Takayuki;Yajima Junichiro
In in vitro microtubule gliding assays, most kinesins drive the rotation of gliding microtubules around their longitudinal axes in a corkscrew motion. The corkscrewing pitch is smaller than the supertwisted protofilament pitch of microtubules, indicating that the corkscrewing pitch is an inherent property of kinesins. To elucidate the molecular mechanisms through which kinesins corkscrew the microtubule, we performed three‐dimensional tracking of a quantum dot bound to a microtubule translocating over a surface coated with single‐headed kinesin‐1 s under various assay conditions to alter the interactions between the kinesin and microtubule. Although alternations in kinesin concentration, ionic strength, and ATP concentration changed both gliding and rotational velocities, the corkscrewing pitch remained left‐handed and constant at ~0.3 μm under all tested conditions apart from a slight increase in pitch at a low ATP concentration. We then used our system to analyze the effect of point mutations in the N‐terminal β‐strand protruding from the kinesin motor core and found mutations that decreased the corkscrewing pitch. Our findings confirmed that the corkscrewing motion of microtubules is caused by the intrinsic properties of the kinesin and demonstrates that changes in the active or retarding force originating from the N‐terminal β‐strand in the head modulate the pitch.
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影响因子:
2.9
作者:
Sack, S;M端ller, J;Mandelkow, E
通讯作者:
Mandelkow, E
DOI:
10.1073/pnas.90.11.5209
发表时间:
1993
影响因子:
11.1
作者:
Russell J. Stewart;Joshua P. Thaler;Lawrence S. B. Goldstein
通讯作者:
Lawrence S. B. Goldstein
影响因子:
3.4
作者:
K. Tawada;K. Sekimoto
通讯作者:
K. Sekimoto
影响因子:
5.7
作者:
Hwang, Wonmuk;Lang, Matthew J.;Karplus, Martin
通讯作者:
Karplus, Martin
DOI:
--
发表时间:
1987
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Porter,ME;Scholey,JM;Stemple,DL;Vigers,GP;Vale,RD;Sheetz,MP;McIntosh,JR
通讯作者:
McIntosh,JR