A single protofilament is sufficient to support unidirectional walking of dynein and kinesin.
A single protofilament is sufficient to support unidirectional walking of dynein and kinesin.
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单一的原丝足以支持动力蛋白和动力素的单向步行。
DOI:
10.1371/journal.pone.0042990
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Toyoshima YY
中科院分区:
文献类型:
--
作者:
Shibata K;Miura M;Watanabe Y;Saito K;Nishimura A;Furuta K;Toyoshima YY
Cytoplasmic dynein and kinesin are two-headed microtubule motor proteins that move in opposite directions on microtubules. It is known that kinesin steps by a ‘hand-over-hand’ mechanism, but it is unclear by which mechanism dynein steps. Because dynein has a completely different structure from that of kinesin and its head is massive, it is suspected that dynein uses multiple protofilaments of microtubules for walking. One way to test this is to ask whether dynein can step along a single protofilament. Here, we examined dynein and kinesin motility on zinc-induced tubulin sheets (zinc-sheets) which have only one protofilament available as a track for motor proteins. Single molecules of both dynein and kinesin moved at similar velocities on zinc-sheets compared to microtubules, clearly demonstrating that dynein and kinesin can walk on a single protofilament and multiple rows of parallel protofilaments are not essential for their motility. Considering the size and the motile properties of dynein, we suggest that dynein may step by an inchworm mechanism rather than a hand-over-hand mechanism.
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DOI:
10.1126/science.1164424
发表时间:
2008-12-12
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Carter AP;Garbarino JE;Wilson-Kubalek EM;Shipley WE;Cho C;Milligan RA;Vale RD;Gibbons IR
通讯作者:
Gibbons IR
影响因子:
3.4
作者:
Inoue, Y;Iwane, AH;Yanagida, T
通讯作者:
Yanagida, T
影响因子:
64.8
作者:
KIKKAWA, M;ISHIKAWA, T;HIROKAWA, N
通讯作者:
HIROKAWA, N
影响因子:
64.8
作者:
HIROSE, K;LOCKHART, A;AMOS, LA
通讯作者:
AMOS, LA
DOI:
10.1073/pnas.91.15.6865
发表时间:
1994-07-19
影响因子:
11.1
作者:
HACKNEY, DD
通讯作者:
HACKNEY, DD