A fluid membrane enhances the velocity of cargo transport by small teams of kinesin-1.
A fluid membrane enhances the velocity of cargo transport by small teams of kinesin-1.
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流体膜提高了小组驱动蛋白-1 的货物运输速度。
DOI:
10.1063/1.5006806
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Xu,Jing
中科院分区:
文献类型:
--
作者:
Li,Qiaochu;Tseng,Kuo-Fu;King,StephenJ;Qiu,Weihong;Xu,Jing
Kinesin-1 is a major molecular motor driving the fundamental process of transport in live cells. While the single-molecule functions of kinesin are well characterized, the physiologically relevant transport of membranous cargos by small teams of kinesins remains poorly understood. A key experimental challenge remains in the quantitative control of the number of motors driving cargo transport. Here we utilized “motile fraction” to overcome this challenge, and experimentally accessed transport by single kinesins through the physiologically relevant transport by small teams of kinesins. We use a fluid lipid bilayer to model the cellular membrane in vitro, and employed optical trapping to quantify transport of membrane-enclosed cargos versus traditional membrane-free cargos at the same motile fraction (motor number). We found that coupling motors via a fluid membrane significantly enhances the velocity of cargo transport by small teams of kinesins. Importantly, enclosing a cargo in a fluid lipid membrane does not impact single-kinesin transport, indicating that membrane-dependent velocity enhancement for team-based transport resulted from altered interactions between kinesin motors. Our study demonstrates that membrane-based coupling between motors is a key determinant of kinesin-based transport. Enhanced velocity may be critical for the timely delivery of cargos in live cells.
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影响因子:
3.3
作者:
Uppulury, Karthik;Efremov, Artem K.;Driver, Jonathan W.;Jamison, D. Kenneth;Diehl, Michael R.;Kolomeisky, Anatoly B.
通讯作者:
Kolomeisky, Anatoly B.
影响因子:
16.6
作者:
通讯作者:
--
影响因子:
--
作者:
Sloboda,RD;Rosenbaum,JL
通讯作者:
Rosenbaum,JL
影响因子:
64.5
作者:
Rai A;Pathak D;Thakur S;Singh S;Dubey AK;Mallik R
通讯作者:
Mallik R
影响因子:
2.4
作者:
KOCHY, T;BAYERL, TM
通讯作者:
BAYERL, TM