Two binding partners cooperate to activate the molecular motor Kinesin-1.
Two binding partners cooperate to activate the molecular motor Kinesin-1.
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DOI:
10.1083/jcb.200605099
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发表时间:
2007-01-01
期刊:
影响因子:
--
通讯作者:
Verhey KJ
中科院分区:
文献类型:
--
作者:
Blasius TL;Cai D;Jih GT;Toret CP;Verhey KJ
The regulation of molecular motors is an important cellular problem, as motility in the absence of cargo results in futile adenosine triphosphate hydrolysis. When not transporting cargo, the microtubule (MT)-based motor Kinesin-1 is kept inactive as a result of a folded conformation that allows autoinhibition of the N-terminal motor by the C-terminal tail. The simplest model of Kinesin-1 activation posits that cargo binding to nonmotor regions relieves autoinhibition. In this study, we show that binding of the c-Jun N-terminal kinase–interacting protein 1 (JIP1) cargo protein is not sufficient to activate Kinesin-1. Because two regions of the Kinesin-1 tail are required for autoinhibition, we searched for a second molecule that contributes to activation of the motor. We identified fasciculation and elongation protein ζ1 (FEZ1) as a binding partner of kinesin heavy chain. We show that binding of JIP1 and FEZ1 to Kinesin-1 is sufficient to activate the motor for MT binding and motility. These results provide the first demonstration of the activation of a MT-based motor by cellular binding partners.
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影响因子:
3.5
作者:
Lee, S;Walker, CL;Wevrick, R
通讯作者:
Wevrick, R
影响因子:
4.8
作者:
Okumura, F;Hatakeyama, S;Nakayama, KI
通讯作者:
Nakayama, KI
影响因子:
21.3
作者:
Coy, DL;Hancock, WO;Howard, J
通讯作者:
Howard, J
影响因子:
7.8
作者:
Kuroda, S;Nakagawa, N;Tokunaga, C;Tatematsu, K;Tanizawa, K
通讯作者:
Tanizawa, K
DOI:
10.1083/jcb.152.5.959
发表时间:
2001-03-05
期刊:
The Journal of cell biology
影响因子:
--
作者:
Verhey KJ;Meyer D;Deehan R;Blenis J;Schnapp BJ;Rapoport TA;Margolis B
通讯作者:
Margolis B