Resting and active states of the ERK2:HePTP complex.
Resting and active states of the ERK2:HePTP complex.
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DOI:
10.1021/ja2075136
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发表时间:
2011-11-02
影响因子:
15
通讯作者:
Page, Rebecca
中科院分区:
文献类型:
--
作者:
Francis, Dana M.;Rozycki, Bartosz;Tortajada, Antoni;Hummer, Gerhard;Peti, Wolfgang;Page, Rebecca
The MAP kinase ERK2 is regulated by numerous phosphatases that tightly control its activity. For example, the hematopoietic tyrosine phosphatase (HePTP) negatively regulates T cell activation in lymphocytes via ERK2 dephosphorylation. However, only very limited structural information is available for these biologically important complexes. Here, we use small angle X-ray scattering combined with EROS ensemble refinement to characterize the structures of the resting and active states of ERK2:HePTP complexes. Our data shows that the resting state ERK2:HePTP complex adopts a highly extended, dynamic conformation that becomes compact and ordered in the active state complex. This work experimentally demonstrates that these complexes undergo significant dynamic structural changes in solution and provides the first structural insight into an active state MAPK complex.
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