Insights into Kinesin-1 Activation from the Crystal Structure of KLC2 Bound to JIP3.
Insights into Kinesin-1 Activation from the Crystal Structure of KLC2 Bound to JIP3.
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DOI:
10.1016/j.str.2018.07.011
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发表时间:
2018-11-06
期刊:
影响因子:
--
通讯作者:
Way M
中科院分区:
文献类型:
--
作者:
Cockburn JJB;Hesketh SJ;Mulhair P;Thomsen M;O'Connell MJ;Way M
Kinesin-1 transports numerous cellular cargoes along microtubules. The kinesin-1 light chain (KLC) mediates cargo binding and regulates kinesin-1 motility. To investigate the molecular basis for kinesin-1 recruitment and activation by cargoes, we solved the crystal structure of the KLC2 tetratricopeptide repeat (TPR) domain bound to the cargo JIP3. This, combined with biophysical and molecular evolutionary analyses, reveals a kinesin-1 cargo binding site, located on KLC TPR1, which is conserved in homologs from sponges to humans. In the complex, JIP3 crosslinks two KLC2 TPR domains via their TPR1s. We show that TPR1 forms a dimer interface that mimics JIP3 binding in all crystal structures of the unbound KLC TPR domain. We propose that cargo-induced dimerization of the KLC TPR domains via TPR1 is a general mechanism for activating kinesin-1. We relate this to activation by tryptophan-acidic cargoes, explaining how different cargoes activate kinesin-1 through related molecular mechanisms. Crystal structure of the kinesin-1 KLC2 TPR domain bound to the cargo JIP3 JIP3 binding site is located on KLC TPR1 and is conserved from sponges to humans Molecular mechanism by which ARF6 regulates kinesin-1 recruitment by JIP3/4 revealed A unified framework explaining how unrelated cargoes activate kinesin-1 Cockburn et al. present the structure of the cargo binding TPR domain of kinesin light chain bound to the cargo molecule JIP3. From this they propose a mechanism by which multiple, unrelated cellular cargo molecules can “hotwire” the kinesin-1 molecule into motility.
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DOI:
10.1083/jcb.200601067
发表时间:
2006-05-22
期刊:
The Journal of cell biology
影响因子:
--
作者:
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通讯作者:
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影响因子:
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DOI:
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期刊:
PROTEINS-STRUCTURE FUNCTION AND GENETICS
影响因子:
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通讯作者:
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影响因子:
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