Autoinhibition of the kinesin-2 motor KIF17 via dual intramolecular mechanisms.
Autoinhibition of the kinesin-2 motor KIF17 via dual intramolecular mechanisms.
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DOI:
10.1083/jcb.201001057
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发表时间:
2010-06-14
期刊:
影响因子:
--
通讯作者:
Verhey KJ
中科院分区:
文献类型:
--
作者:
Hammond JW;Blasius TL;Soppina V;Cai D;Verhey KJ
Kinesin-2 motor KIF17 autoinhibition is visualized in vivo; in the absence of cargo, this homodimer’s C-terminal tail blocks microtubule binding, and a coiled-coil segment blocks motility. Long-distance transport in cells is driven by kinesin and dynein motors that move along microtubule tracks. These motors must be tightly regulated to ensure the spatial and temporal fidelity of their transport events. Transport motors of the kinesin-1 and kinesin-3 families are regulated by autoinhibition, but little is known about the mechanisms that regulate kinesin-2 motors. We show that the homodimeric kinesin-2 motor KIF17 is kept in an inactive state in the absence of cargo. Autoinhibition is caused by a folded conformation that enables nonmotor regions to directly contact and inhibit the enzymatic activity of the motor domain. We define two molecular mechanisms that contribute to autoinhibition of KIF17. First, the C-terminal tail interferes with microtubule binding; and second, a coiled-coil segment blocks processive motility. The latter is a new mechanism for regulation of kinesin motors. This work supports the model that autoinhibition is a general mechanism for regulation of kinesin motors involved in intracellular trafficking events.
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影响因子:
16.2
作者:
Jacobson, C;Schnapp, B;Banker, GA
通讯作者:
Banker, GA
影响因子:
21.3
作者:
Coy, DL;Hancock, WO;Howard, J
通讯作者:
Howard, J
DOI:
10.1073/pnas.0803575105
发表时间:
2008-07-01
影响因子:
11.1
作者:
Dietrich, Kristen A.;Sindelar, Charles V.;Rice, Sarah E.
通讯作者:
Rice, Sarah E.
DOI:
10.1083/jcb.200605099
发表时间:
2007-01-01
期刊:
The Journal of cell biology
影响因子:
--
作者:
Blasius TL;Cai D;Jih GT;Toret CP;Verhey KJ
通讯作者:
Verhey KJ
影响因子:
11.4
作者:
Lee, JR;Shin, H;Kim, E
通讯作者:
Kim, E